Day 1 :
Keynote Forum
Xuenian Chen
Henan Normal University, China
Keynote: Target synthesis and mechanism studies of boron/nitrogen-alkane analogs
Time : 10:00-10:30
Biography:
Xuenian Chen has rewarded his PhD from Lanzhou Institute of Chemical Physics (LICP) of Chinese Academy of Sciences (CAS). He is the Director of Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials. His major field is Boron Chemistry, Organometallic and Coordination Chemistry. He has published more than 80 papers in reputed journals and has been serving as an Editorial Board Member of repute.
Abstract:
Boron/nitrogen materials are well known and have been applied in many fields because of their unique properties such as super hardness and good abrasivity. On the basis of the Isolobal Analogy, B-N is iso-electronic to C-C so B, N-alkane analogs should have a similar framework to alkanes and be generally occurred. However, a very few B, N-alkane analogs can be used to make B/N materials mainly due to their unavailability. The different electronegativity of boron from nitrogen leads B, N-alkane analogs to be polar molecules and hydrogen bonding to boron and nitrogen atoms are chemical active, which results in totally different properties of B, N-alkane analogs from that of alkanes. For example, ethane is a non-polar molecule and its melting point is -184ËšC, but its isolectronic B, N-alkane analogs, ammonia borane, NH3BH3, is a polar molecule with the M.P. 103ËšC. The polarity and activity of B, N-alkane analogs mentioned above make their preparation difficult. As a result, only a few B, N-alkane analogs such as NH3 (BH2NH2) nBH3, (n=0, 1, 2) were prepared, and in most case, these compounds were serendipitously prepared. We found such B, N-alkane analogs can be target synthesized using proper reactions. In this topic, we report the target synthesis of B, N-alkane analogs. We will also discuss the influence factors and mechanism of reactions and try to summarize the general synthetic methods for preparation of long chain B, N-alkane analogs.
Keynote Forum
Werner Urland
University of Fribourg, Switzerland
Keynote: Design of lanthanide based phosphors using non-empirical calculations
Time : 10:30-11:00
Biography:
Werner Urland received his PhD in Inorganic Chemistry in 1971 from Giessen University. During his PhD, he joined the group of Prof. Lord J Lewis at the University of London and worked together with Dr. M Gerloch in the field of magnetochemistry. Afterwards, he spent two years as a Post-doctoral fellow at the University Chemical Laboratory in Cambridge in the group of Prof. Dr. A D Buckingham working on Theoretical Chemistry. After his habilitation on magnetochemistry of lanthanide compounds in 1980, he joined the group of Prof. Dr. A Simon at the Max-Planck-Institute for solid state research in Stuttgart. In 1986, he became a Professor for Inorganic Chemistry at the University of Hannover. His current research as a guest Professor at the University of Fribourg is focused on the theory of 4f- and 5f-systems.
Abstract:
Phosphors doped by divalent or trivalent lanthanides are in the spotlight of scientific investigation due to possible application via domestic lighting, laser materials or scintillator crystals. Non-empirical calculations are used to design new phosphors by predicting their luminescence properties. The model is based on Density Functional Theory, which is used to parameterize an effective Hamiltonian that includes electrostatic, spin-orbit and ligand field contributions. From this calculations the multiple energy levels arising from the ground [Xe]4fn and excited [Xe]4fn 15d1 electron configurations of Ln2+ and Ln3+ in their chemical environment are obtained. The results are in good agreement with the experimental investigations, validating the usefulness of the theoretical modelling to understand and characterize the luminescence spectra of phosphors.
- Fundamentals and principles of Applied Chemistry | Applied Physical Chemistry | Applied Surface Chemistry Applied Inorganic Chemistry | Catalytic Chemistry
Location: Windsor II
Chair
Mauro Coelho dos Santos
Federal University of ABC, Brazil
Co-Chair
Sergei A Kulinich
Tokai University, Japan
Session Introduction
Dina Ahmed El-Gayar
Alexandria University, Egypt
Title: Intensification of the rate of production of an annular electrochemical reactor used to conduct diffusion controlled reactions by the combined swirl flow and surface roughness
Time : 11:20-11:40
Biography:
Dina Ahmed El-Gayar has completed her PhD from Alexandria University Faculty of Engineering and finished MSc Chemical Engineering from the same university in 2009. She is Lecturer at Chemical Engineering Department, Alexandria University. She is Instructor for Process control and Renewable Energy Resources. She is member in the executive office of Quality Assurance Unit in faculty of Engineering. She works in Alex Uni. Team in a Trinex project funded by Tempus as one of the partners of the project. She has published 2 papers in international journals and 2 papers are in progress.
Abstract:
Rates of mass transfer at the inner rough surface of an annulus were determined under swirl flow by an electrochemical technique which involves measuring the limiting current of the cathodic reduction of K3Fe(CN)6. Roughness was made by cutting longitudinal grooves in the inner cylinder transverse to swirl flow. The variables studied were solution velocity, peak to valley height of the roughness element, physical properties of the electrolyte, active length of the inner cylinder and the effect of drag reducing polymers. The rate of mass transfer was found to increase with increasing swirl flow velocity and the degree of surface roughness. Mass transfer data at smooth and rough surfaces were correlated by dimensionless correlations. Drug reducing polymers were found to decrease the rate of mass transfer by an amount ranging from 5 to 23%. Implication of the present results for the design and operation of high space-time yield annular and catalytic reactors used to conduct diffusion controlled reactions such as electro organic synthesis; electrochemical waste water treatment; photo catalytic reactions and immobilized enzyme catalyzed biochemical reactions etc., were highlighted. The importance of the present results in designing more efficient annular membrane equipment's with inner corrugated membrane to conduct processes such as reverse osmosis, dialysis and ultra-filtration under swirl flow was pointed out. By virtue of the analogy between heat and mass transfer the importance of the present results in designing more efficient heat exchanger was noted.
Antonio Martins Figueiredo Neto
University of Sao Paulo, Brazil
Title: Effect of the presence of strong and weak electrolytes on the existence of the uniaxial and biaxial nematic phases in lyotropic mixtures
Time : 11:40-12:00
Biography:
Antonio Martins Figueiredo Neto concluded in Physics The DPA [SP-CAPITAL] by Sao Paulo University in 1981. Currently, he is Professor at Sao Paulo University. He has published over 100 journal articles and more than 20 papers in event proceedings. He published a book about the Physics of Crystals Liquids by Oxford University Press and Co-edited “Another World” for SCI. He has 3 chapters published in books and 4 product technological registered. He guided more than two Master’s dissertations and PhD theses in Physics and received one prize and/or tribute. He worked extensively in physics, with emphasis in physics of fluids complex.
Abstract:
Lyotropic mixture of potassium laurate/decanol/water presenting only the uniaxial nematic calamitic phase was doped with KCl, DL-mandelic acid, benzoic acid, DL-phenyllactic acid, phenylacetic acid, phenol, phenylmethanol, benzene, RS-hexahydromandelic acid, cyclohexanecarboxylic acid, cyclohexaneacetic acid, cyclohexanol, cyclohexylmethanol and cyclohexane, separately. The nematic phase sequences were investigated as a function of the dopant molar concentration and temperature. Laser conoscopy was used to characterize the nematic phases. Weak electrolytes having –COOH group as polar part were shown to be very effective in stabilizing the three nematic phases (two uniaxial and the biaxial). Guest molecules with only the –OH group did not show any effect on the stabilization of other nematic phases. There is no direct relation between the solubility of the guest molecule in water and its effectiveness to stabilize the different nematic phases. We observed that the guest molecule acidity constant pKa was shown to be an important parameter. These dopants were shown to be more effective in the stabilization of the three nematic phases when comparing to strong electrolytes. We interpreted the results in terms of the location of dopant molecules at the micelle surfaces and their effectiveness of screening the polar head repulsion. This situation favors the relaxing of curved surfaces in the micelle, increasing the flat micellar surfaces. These flat surfaces are perpendicular to the main amphiphilic bilayer. The increase of the micellar dimensions in this plane favors the orientational fluctuations characteristic of the nematic discotic phase, as observed in our experimental results.
Mauro Coelho dos Santos
Federal University of ABC, Brazil
Title: Degradation of organic pollutants using nanomaterials and electrochemical advanced oxidative processes
Time : 12:00-12:20
Biography:
Mauro Coelho dos Santos has completed his PhD from São Paulo University, Brazil and Post-doctoral studies from Federal University of São Carlos, Brazil. He is the Coordinator of the Laboratory of Electrochemistry and Nanostructured Materials of ABC Federal University, Brazil. He has published more than 86 papers in reputed journals and has been serving as an Editorial Member of Electrocatalysis. He serves as the Editor of Journal of Nanomaterials (2012). He has received Academic Excellence Prize from Federal University of ABC (2015) in the area of Chemistry. He has 1,300 citations in ISI and H-Index of 23.
Abstract:
This work describes the use of both carbon modified with nanostrucutres (nanoparticles, nanowires and nanospheres) containing metal and metals oxides and boron doped diamond electrodes for degradation of cyprofloxacine, fenol, dypirone, blue – Evans dye. The main materials prepared are related to: Carbon materials modified with functional groups by acidic and alkaline treatment and nanomaterials modifying carbon support. The effects of increasing H2O2 electrogeneration are associated to the surface properties of the two materials which are completely different from those ones of pure carbon for further production of hydroxil radicals. For this reason, we have been developing changes of the carbon materials with acidic and alkaline treatment and using nanostructures of different oxides and metals with very small amounts on carbon and base materials for H2O2 electrogeneration. The main surface chemistry phenomena of this work is to discuss the modification of the carbon properties such as hydrophilicity, conductivity, structure and composition of the surface species when we use both different carbon treatments and different proportions of nanostructures with several oxides and metals on carbon. In the case of the use of Boron-Doped Diamond Surfaces using Solar Photo-Electron-Fenton Processes is same as in the case of cyprofloxacione in synthetic urine. At the latter case we are capable to promote the electrochemical incineration of the molecule yielding 96% ciprofloxacin removal and 98% mineralization after 360 min of electrolysis at optimum values of pH 3.0 and current density of 66.6 mA cm−2. The evolution of released inorganic ions was followed by ion chromatography.
Venkatasubba Naidu Nuthalapati
Sri Venkateswara University, India
Title: A novel high performance dual biosensor for the detection of aspartame in food samples
Time : 12:20-12:40
Biography:
Venkatasubba Naidu Nuthalapati has completed his PhD from Sri Venkateswara University and currently working as a Professor in the Department of Chemistry, Sri Venkateswara University, India. His research involves the development of novel and cost effective spectroscopic and electrochemical methods for the detection of organic and inorganic molecules from different matrices. He has published more than 100 papers in reputed journals and has been serving as an Editorial Board Member of repute.
Abstract:
An improved high performance dual enzyme based biosensor has been developed for the determination of aspartame in food samples. The nanobiocomposite involves ammonium piperidine dithiocarbamate (APDC) capped copper nanoparticles (CuNPs) loaded on multi walled carbon nanotubes (MWCNTs) and assimilated with β-cyclodextrin. Finally, the dual enzyme system was immobilized onto the electrode surface to construct CHT-LAAO/CuNPs-APDC-MWCNTs-β-CD/GCE. Characterization was performed using Transmition electron microscope (TEM), Thermogravimmetric analysis (TGA), X-ray diffraction (XRD) and Fourier transition infrared spectroscopy (FT-IR). The biosensor showed optimum response within 5s at pH 7.5 and 35oC, when polarized at 0.25 V vs. Ag/AgCl. Furthermore, CHT and LAAO were adsorbed tightly on the surface of the modified electrode and shows enzyme activity to convert aspartame to its oxidized product of keto ester and H2O2. There was a linear relationship between biosensor response (mA) and aspartame concentration in the range 0.001–2.0 mM. The sensitivity of the biosensor was 78.35 µA cm−2mM−1 with a detection limit of 0.005 mM (S/N=3). The long term stability of the sensor in terms of 89.0% of the original response on the third day was observed when conducted over a range of ten runs for five days using the same coating. The biosensor was evaluated and employed for the measurement of aspartame concentrations in different commercially available food samples.
Sergei A Kulinich
Tokai University, Japan
Title: Nanoflake arrays: Their preparation and gas-sensing
Time : 13:50-14:10
Biography:
Sergei A Kulinich obtained his PhD degree in Inorganic Chemistry from Moscow State University and then was a Post-doctoral fellow and Research Associate at the University of Tokyo (Materials Engineering), University of Quebec at Chicoutimi (Applied Sciences), University of British Columbia (Chemistry) and Osaka University (Materials Engineering). His recent research activities include gas sensors, thin films and coatings, materials and surface analysis, superhydrophobic and anti-icing surfaces and nanomaterials (especially those prepared via laser ablation in liquids).
Abstract:
Gas sensors play a key role in daily life, contributing actively to toxic- and explosive-gas alarms, automotive cabin air-quality control, health care, household appliances and so on. Therefore, tremendous efforts have been recently made to design and fabricate reliable and durable sensors with high sensitivity and selectivity, as well as fast response, toward various gases. This work focuses on chemi-resistive gas sensors prepared via the chemical bath deposition approach, such as nanoarrays of CdO, which demonstrate promise in detecting certain volatile organic compounds, having high selectivity, sensitivity and fast response time. The preparation, characterization and performance of such sensors are described and sensing mechanisms are commented.
Xuenian Chen
Henan Normal University, China
Title: Agostic interaction influencing catalyst procedure and C-H chemical shift
Time : 14:10-14:30
Biography:
Xuenian Chen has done his PhD from Lanzhou Institute of Chemical Physics (LICP) of Chinese Academy of Sciences (CAS). He is the Director of Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials. His major field is Boron Chemistry, Organometallic and Coordination Chemistry. He has published more than 80 papers in reputed journals and has been serving as an Editorial Board Member of repute.
Abstract:
Agostic interaction is a weak interaction between an inert C-H and M, which often used to activate C‒H bonds resulting in new reactions. In this topic, we report examples of designed catalysts based on the agostic interaction. Novel copper(I) complexes [BBN(pzx)2]Cu(PPh3)n (BBN=9-borabicyclo[3.3.1]nonane; pzx=3-substituted pyrazole; x=H, n=2; x=Me, n=1) and {[BBN(pziPr)2]Cu}2 have been synthesized and structurally characterized. Single crystal studies of these compounds showed weak intra-molecular C‒H∙∙∙Cu interactions which can be assigned as agostic interactions. Catalytic studies of these complexes toward carbenoid insertion into N‒H bonds indicate these weak interactions act as a “switch” which will be turned “on” if interacting with the substrate and “off” if eliminating the substrate and regenerating the weak interaction. The process of the “switch” turning “on” or “off”, related to the catalytic effect, is found to be influenced by both steric effects and the solvent: a less sterically hindered catalyst in non-coordinating benzene results in high yield, while a more sterically hindered catalyst in coordinating THF results in relatively low yield. We also found that the agostic interaction in nickel containing complex could cause great C-H chemical shift.
M C Enedoh
Imo State University, Nigeria
Title: Complexes of salicyladehyde-2-amino-4-thiazoleacetic acid hydrazone (ATASH) with some M(II) sulphates and acetates (M= Ni, Cu, Co, Zn, Mn)
Time : 14:30-14:50
Biography:
M C Enedoh has completed her PhD from the University of Abuja, Nigeria. She has published some papers in reputable journals. She has been serving as a Lecturer in Chemistry at the Imo State University, Nigeria. She is an Academic Adviser to all chemistry students.
Abstract:
Synthesis of the complexes of salicylaldehyde-2-amino-4-thiazoleacetic acid hydrazone (ATASH) with M(II) sulphates and acetates was carried out (M=Ni, Cu, Co, Mn and Zn). The ligand and complexes were characterized by conductance, elemental analyses, infrared and electronic spectral studies. The conductivity data showed that both the ligand and complexes are non-electrolyte. The ligand and complexes were screened for antimicrobial activity and one of the compounds was relatively active against the organism tested. An octahedral coordination for Ni2+, Mn2+and Co2+ complexes was observed through the electronic spectroscopy while Cu2+ complexes may possibly be of a square planar coordination. The Infrared spectra a data indicate bidentate coordination via the oxygen of the carbonyl group and the azomethine group, the SO42- and OA- anions are in their inner coordination spheres.
Zhiyong Wang
Troy University, USA
Title: Study of Pd nanoparticles and metal-organic framework (MOF) composite as heterogeneous catalyst
Time : 14:50-15:10
Biography:
Zhiyong Wang completed his PhD in Chemistry from Northwestern University and received Post-doctoral studies at University of Pittsburgh and then Texas A&M University. He worked in a number of organic chemistry related areas including enzyme inhibitor design, drug discovery, protein functional studies and applications of metal-organic frameworks. He is currently an Assistant Professor at the Department of Chemistry and Physics at Troy University. He has published more than 20 papers in reputable journals.
Abstract:
By combining the great catalytic activity of palladium nanoparticles and large surface area and tunable structure of metal-organic frameworks, we have developed a Pd@MIL-101 composite material as a heterogeneous catalyst for the tandem in situ generation of hydrogen from ammonia borane and reduction of various nitro compounds. The catalyst exhibits high activity, selectivity and recyclability. A variety of aliphatic and aromatic nitro compounds with different groups were able to be reduced to the respective primary amines with excellent conversion yields (>99%) in very short reaction times (1.5–5 min). Six consecutive runs of the tandem catalysis result in no discernable loss of catalytic ability, demonstrating the great stability and recyclability of the Pd@MIL-101 catalyst. Compared to other reported reduction systems for nitro compounds, our catalyst does not require stored or pressurized hydrogen and it is therefore not only more efficient but also much safer. The application of Pd@MIL-101 in a number of other organic transformations will also be discussed.
Xiaoming Sun
Beijing University of Chemical Technology, China
Title: Super-wetting micro-/nano-structured electrodes for gas-involved electro-catalysis
Time : 15:10-15:30
Biography:
Xiaoming Sun has gained his BS degree and PhD in Department of Chemistry, Tsinghua University in 2000 and 2005, respectively. After Post-doctoral work at Stanford University, he joined State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology in 2008. His main research interests focus on separation and assembly of inorganic nanostructures, synthesis and separation of carbon nanomaterials and their composites and structure control, opto-/electro-property investigations of nanoarrays and superwetting micro-/nanostructure electrodes for energy sciences. He has authored 63 journal articles (e g. J. Am. Chem. Soc., Angew. Chem. Int. Ed., Adv. Mater., ACS Nano) which have been cited >4600 times.
Abstract:
Electrochemical gas-involved reactions can be divided into two types: gas-evolution reaction and gas-consumption reaction, both of which are crucial for a variety of energy conversion processes and industries (e.g. HER and ORR). For gas-evolution reaction, if generated gas bubbles pin at the electrode surface and cannot escape from the surface in time, the accumulated bubbles will reduce the effective electrode surface area, increase diffusion resistance and enlarge polarization effect, resulting in more energy consumption. How to construct a novel electrode to promote gas bubble release is critical for improving the electrochemical efficiency besides activity improvement. Inspired from bio-inspired superwetting surfaces, we found that the interface behavior of electrode could be tuned by surface architecture construction, for example, transferring from aerophobic to superaerophobic by engineering a series of micro-/nanostructured electrode, e. g. MoS2, pine-shaped Pt, NiFe LDHs and Cu films. This kind of superaerophobic electrodes could decrease the critical size of gas overflowing from the surface by cutting the three phase contact lines into discontinue dots, and thus reduce the diffused impedance and maintain the integrity of the solid−liquid interface that is necessary for electrocatalysis (e.g. water splitting and hydrazine fuel cells). On the other hand, for gas-consumption reaction, the construction of micro-/nanostructured “superaerophilic” electrode could accelerate gas diffusion to reaction zone via gas-phase to solve the issue of low solubility and slow diffusion of gases in traditional electro catalysis reaction system with limited current density (e g., ORR). Therefore, the construction of superwetting electrodes is imperative to improve gas transport at electrodes surface and to enhance activity and stability of electrodes.
Sanjeev P Maradur
Poornaprajna Institute of Scientific Research, India
Title: Valorization of bioglycerol to value added products: Sulfonated mesoporous Polydivinylbenzene (PDVB) as an efficient solid acid catalyst for room temperature synthesis of solketal
Time : 15:30-15:50
Biography:
Sanjeev P Maradur has completed his PhD from Shivaji University Kolhapur, India in 2006 and worked as Research Scientist in Jubilant Life Sciences Ltd, Noida, India. He then moved to South Korea in 2009 for his Post-doctoral studies to work with Prof. R Ryoo at Center for Functional Nanomaterials, Korea Advanced Institute of Science and Technology (KAIST), and Prof. K S Yang at Alan MacDiarmid Energy Research Institute (AMERI), Chonnam National University, Gwangju Republic of Korea. He then moved to University of Oklahoma at Norman to work with Prof. Kenneth M Nicholas on catalytic conversion of biomass derived polyols to olefins. He is presently Asst. Professor at Poornaprajna Institute of Scientific Research, Bangalore, India. He has published more than 15 papers in reputed journals and two patents to his credit. He has guided 2 MTech students and 3 graduate students are presently working in his group. He is a recipient Young Scientist Research Award from Government of Karnataka, India. He is the Co-Investigator for industry project sponsored by GTC Technology Inc, USA and Hindustan Petroleum Corporation Ltd, India.
Abstract:
Acetalization of glycerol with acetone is very significant reaction for synthesis of solketal (2, 2-dimethyl-4- hydroxymethyl-1, 3-dioxolane). Solketal can be used as an additive in formulation of diesel, biodiesel and gasoline fuels. It decreases the viscosity, improves cold properties and provides the required flash point to the biodiesel. These oxygenated products when blended with the diesel fuel curtail the uncontrolled emission of carbon monoxide, particles, hydrocarbons and aldehydes. Challenge in the synthesis of glycerol derivatives is the formation of by-product water which hinders the catalytic activity in case of silica due to low hydrothermal stability and commercial resins being too hydrophilic. Moreover, the commercial resins are not characterized by well-defined pores. Diffusion limitation and polymer swelling remain as disadvantage despite the development of large-pore resins, low-swelling polymers. In this work, sulfonic acid functionalized mesoporous polymer catalyst (MP-SO3H) was prepared by post synthetic modification of mesoporous polydivinylbenene by incorporating sulfonic acid moiety using conc. H2SO4. The synthesized materials were characterized by using several physicochemical techniques and their performance was evaluated for room temperature liquid phase acetalization of glycerol with acetone. MP-SO3H catalyst performed better than other conventional solid acid catalysts with 94 % glycerol conversion and 98.5 % selectivity for solketal. The high activity of MP-SO3H catalyst can be attributed due to facile diffusion of reactants and products in the mesoporous environment together with an optimized balance of acid functionalization. Glycerol conversion increased with increase in the total acidity of the catalyst. Amount of acidity and surface density of (H+) ions were found to have a direct correlation with catalyst performance.
Ganapati Shanbhag
Poornaprajna Institute of Scientific Research, India
Title: Novel metal hydroxystannates and their oxides as solid acid-base catalysts for biodiesel synthesis and glycerol transformations
Time : 15:50-16:10
Biography:
Ganapati Shanbhag has completed his PhD from National Chemical Laboratory, Pune, India in 2008 and 2-year Post-doctoral studies from Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea. He is presently Asst. Professor at Poornaprajna Institute of Scientific Research, Bangalore, India. He has published more than 35 papers in reputed journals and has been serving as an Editorial Board Member of Journal of Catalyst and Catalysis. He has guided 3 PhDs and 3 MTech theses. He is the Principal Investigator for industry projects sponsored by GTC Technology Inc, USA and Hindustan Petroleum Corporation Ltd, India.
Abstract:
Increasing demand for petroleum fuels and depleting availability of crude oil has made to look for alternative sources of energy. Biodiesel is one such source which attracted many researchers since it can be synthesized by transesterification of vegetable oil in presence of an acid or a base catalyst. To overcome the issues related to homogeneous catalysts like NaOH, heterogeneous acid-base catalysts were developed to make an eco-friendly process of biodiesel synthesis. Further, to improve the economics of the process, the byproduct glycerol can be converted into value-added chemicals like acetins and glycerol carbonate via transesterification and carbonylation reactions respectively. In this work, a novel metal hydroxystannate was reported as a strong base catalyst for organic transformations. It has a perovskite type crystal structure with metal atoms octahedrally coordinated with corner sharing hydroxyl groups to form Sn(OH)6 and M(OH)6 octahedra (where M is Ca, Zn, Mg or Sr). It is found that calcium hydroxystannate acts as a strong solid base catalyst with very high activity for biodiesel synthesis from vegetable oils and synthesis of acetins from glycerol. On the other hand, zinc hydroxystannate acts as bifunctional acid-base catalyst with hydroxy groups contributing as basic sites and zinc as Lewis acid center. This catalyst was successfully applied for glycerol carbonylation with urea to make glycerol carbonate. Further, calcination of metal hydroxystanntes at high temperatures resulted in metal composite oxides which also found to exhibit good acidity and basicity which are successfully applied for glycerol transformation reactions.
Imeda Rubashvili
Tbilisi State University, Georgia
Title: Development and validation of carotenoids determination method in organic extracts obtained from agro industrial waste materials using extraction techniques and high performance liquid chromatography
Time : 16:40-17:00
Biography:
Imeda Rubashvili has completed his PhD from Georgian Technical University and Post-doctoral study from the University of Liege. He is a Scientific Researcher at Ivane Javakhishvili Tbilisi State University and the Head of Validation department of pharmaceutical company “Aversi-rational” Ltd. He has published more than 25 scientific papers and has participated in more than 30 international scientific conferences. He is the member of the council of young scientists of the Georgian National Academy of Sciences.
Abstract:
The manufacture of food products and dietary supplements using natural food pigments and other different natural compounds has been attracted attention in the field of modern food industry. One of the necessary and interesting natural compounds are carotenoids which show strong antioxidant and immunomodulation activities and may prevent degenerative diseases as well. The present research concerns the development and validation of a new, rapid, modern, effective and selective HPLC method for determination of carotenoids – beta-carotene and lycopene in organic extracts obtained from tomato, tangerine and orange agro industrial waste materials using extraction techniques-supercritical fluid and sequential ultrasonication-assisted extractions. The method was developed using RP-18 end-capped LiChroCART 4 x 250mm, 5μm column. The method was validated with respect to robustness, system suitability test, specificity, linearity-range, accuracy, precision, limit of detection (LOD) and quantitation (LOQ). The LOD and the LOQ are 0.081µg/mL and 0.041µg/mL for beta-carotene, 0.034µg/mL and 0.085µg/mL for lycopene, respectively. The content of each carotenoid per 1 g of dried local agro industrial waste material varies for beta-carotene 0.290-10.030 µg (tomato peel), 0.445-3.972 µg (tangerine peel), and 0.833-2.455 µg (orange peel) and for lycopene 0.418-143.79 µg (tomato peel), 0.051-179.988 µg (tangerine peel), 0.091-0.114 µg (orange peel).
Y. Walid Bizreh
Damascus University, Syria
Title: Use of a new developed micro-pulse-like reactor for the kinetic catalytic measurements of CO, CH, NO, and NOx removal from car exhaust gases on the catalyst (BZ Ag2 O, Al2 O3 -MoO3 -Ag2 O)
Time : 17:00-17:20
Biography:
Prof. Y. Walid Bizreh harvested twelve different scientific patents relating to the diverse fields of Chemistry; four of which were presented, examined and passed successfully as novelty by WIPO; WIPO is the World Intellectual Property Organization. Dr. Bizreh has authored eight books that are core curriculum in different universities in the Mediterranean region and participated in translating others. Dr. Y. Walid Bizreh has completed his PHD at the age of 33 years from the Moscow State University. Prof. Bizreh was a visiting scientist at the University of Delaware, DE, USA at the Center of Catalytic Science and Technology in 1981 and 1982. He has been a professor of physical and surface chemistry at Damascus University since 1969. In addition to his books, Dr. Bizreh has published over twenty papers, harvested 12 patents, supervised four PHDs, and supervised nine master dissertations. Prof. Bizreh was the chief editor of the Damascus University Journal of Essential Sciences between the years of 1999-2001.
Abstract:
Researches on car exhaust gas pollutants require accurate information particularly those of kinetics of catalytic reactions concentrating de-NO, de-NOx and de-CH, that take place in catalytic converters connected directly with the engine of the motor car. Unstable velocity of out coming flow gas from car exhaust of the main impediment to be overcome in order to determine the desired kinetic parameters. Therefore, we have constructed a laboratory pilot plant, data obtained by means of which have been proved to be in accord with the kinetic equation for the pulse flow catalytic reactions. This pilot plant has been repeatedly used and determine the kinetic parameters and catalytic activity for new 11 catalysts prepared by us from metal oxides supported by matrix of Syrian natural zeolite, Jordanian natural zeolite, and Syrian bentonite. The DTA diagrams indicated characteristic indothermal and exothermal effects. The adsorption- desorption of N2 measurements were carried out at -196 C. In addition to FTIR studies.
- Video Presentations
Session Introduction
Deb Narayan Nath
Indian Association for the Cultivation of Science, India
Title: Effect of variation of viscosity on magnetic field effect in radical ion pair system at various permittivities
Biography:
Deb Narayan Nath is currently working as Professor in Indian Association for the Cultivation of Science, India.
Abstract:
In the literature the role of viscosity on the magnetic field effect (MFE) on radical ion pair (RIP) system has been studied mainly by flash-photolysis experiment through monitoring the escape products and the inter system crossing (ISC) being taking place via ∆g mechanism. In this work we have studied the effect by monitoring the singlet exciplex luminescence of pyrene-N, N, di-methylaniline (Py-DMA) system. The Noyes approach of classical Smoluchowksi equation of stochastic motion states that as the diffusivity increases, the recombination probability of geminate RIP should increase. We know that to have MFE the RIP must diffuse out to the extent of S-T degeneracy where hyperfine interaction (HFI) induced ISC can be operative and at the same time to observe the effect on singlet exciplex luminescence there should be also appreciable recombination probability. The role of diffusivity on MFE thus mainly depends on the relative distances of RIP generation and recombination. Burshtein et al has considered the spatial dispersion of free energy (ΔG) and reorganization energy (Er) and the simplified concept of exponentially decreasing CT probability W(r) (according to Marcus) changes to bell shaped curve (non-monotonous, the probability is maximum not at contact but at a certain distance) for both ionization [WI(r)] and recombination [WR(r)]. According to Burshtein model; at very high diffusivity when the system is kinetically controlled the transfer is approximated to be contact. Whereas, when ionization is controlled by diffusion (under viscous condition) the spherical reaction layer, where ions are mainly born (rg), is shown to have a greater radius than the closest approach distance. Burshtein model predicts opposite slope of MFE with diffusivity in the kinetically controlled and diffusion controlled regime.
Biography:
Phoebe Farag Allah Lamie has completed her PhD from Beni-Suef University, Egypt and Post-doctoral studies from the same university. She has published about 9 papers in different international journals.
Abstract:
Sixteen new phthalimide derivatives were synthesized and evaluated for their
in vitro anti-microbial, anti-oxidant and anti-inflammatory activities. The cytotoxicity for all synthesized compounds was also determined in cancer cell lines and in normal human cells. None of the target derivatives had any cytotoxic activity. (ZE)-2-[4-(1-Hydrazono-ethyl) phenyl] isoindoline-1, 3- dione showed remarkable anti-microbial activity. Its activity against Bacillus subtilis was 133%, 106% and 88.8% when compared with the standard antibiotics ampicillin, cefotaxime and gentamicin, respectively. (ZE)-2-[4-(1-Hydrazonoethyl)phenyl]isoindoline-1,3-dione also showed its highest activities in Gram negative bacteria against Pseudomonas aeruginosa where the percentage activities were 75% and 57.6% when compared sequentially with the standard antibiotics cefotaxime and gentamicin. It was also found that the compounds 2-[4-(4-ethyl-3-methyl-5-thioxo-1,2,4-triazolidin-3-yl)phenyl]isoindoline-1,3-dione and 2-[4-(3-methyl-5-thioxo-4-phenyl-1,2,4-triazolidin-3-yl)phenyl]isoindoline-1,3-dione had anti-oxidant activity. 4-(N'-{1-[4-(1, 3-Dioxo-1, 3-dihydro-isoindol-2-yl)-phenyl]-ethylidene}-hydrazino)-benzenesulfonamide showed the highest in vitro anti-inflammatory activity of the tested compounds (a decrease of 32%). To determine the mechanism of the anti-inflammatory activity of 4-(Nʹ-{1-[4-(1, 3-dioxo-1, 3-dihydro-isoindol-2-yl)-phenyl]-ethylidene}-hydrazino)-benzenesulfonamide, a docking study was carried out on the COX-2 enzyme. The results confirmed that the latter had a higher binding energy score (-17.89 kcal/mol) than that of the ligand celecoxib (−17.27 kcal/mol).
Biography:
John N Phillopes has completed his PhD from Beni-Suef University, Egypt and Post-doctoral studies from the same University. He has published many papers in different international journals.
Abstract:
Three new series of thiazoles, quinolones and thiazolidinones merged with benzimidazole, benzoxazole and benzothiazole nuclei were synthesized. All the prepared compounds were subjected to IR, 1H NMR, 13C NMR, mass spectral data and elemental analyses. Cytotoxic activity of the synthesized compounds was evaluated against two different types of cancer cells, breast (MCF-7) and colon cancer (HCT-116) cell lines. Seven compounds showed potent cytotoxic activity compared with doxorubicin, the reference drug with IC50 between 0.0125-0.0198 µM.