Pawanpreet Kaur
DAV College, India
Title: A tripod exhibiting colorimetric and OFF-ON-OFF fluorogenic response for some metallic species
Biography
Biography: Pawanpreet Kaur
Abstract
An “off-on-off” type tripodal Schiff base chemosensor derived from condensation of tris(2-aminoethyl)amine and 2-hydroxynaphthalene-1-carboxaldehyde exhibiting pronounced fluorescence signaling for Zn2+ and Cd2+ as well as chromogenic response towards Fe3+, Fe2+, Zn2+ and Cd2+ ions has been explored herein. The sensor can be considered as molecular switch which turns “ON” upon selective binding with Zn2+/Cd2+ ions and “OFF” in the simultaneous presence of Zn2+/Cd2+ and IO4- ion. The addition of metallic cations induces a remarkable colorimetric response from yellow to colorless (for Zn2+, Cd2+), purple (for Fe3+) and light green (for Fe2+). Therefore, the sensor can easily differentiate two states of iron (Fe3+ from Fe2+) by revealing distinctive colors. In addition, the detection limit of the sensor towards Zn2+/Cd2+ was slowed down to nanomolar concentration. Thus, it is potentially significant sensor and can be applied to both the environment and biological systems.