A Dual Responsive Turn-on Chemosensor for the Detection of AS(III) in Aqueous Environment

Verma, Vikas (2017) A Dual Responsive Turn-on Chemosensor for the Detection of AS(III) in Aqueous Environment. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Vikas Verma (12MS087)) Thesis_Vikas_Verma_12MS087_2017.pdf - Submitted Version Restricted to Repository staff only Download (3MB)

Abstract

Monitoring As(III) affected water bodies on a regular basis requires a reliable, simple and cost effective testing method. In this work, we have designed and synthesized fluorescein-derived monomer (FT) and it’s polymer (Poly-Nor-OR) which is first example of a chemodosimeter for simple and efficient detection of As(III) in aqueous environment. The sensitivity and selectivity of the monomer and it’s polymer towards As(III) among different metal ions were investigated by UV-vis and fluorescence spectroscopy. Complexing with As(III) ion leads to spirolactam ring opening of FT and consequently causes a color variation from colorless to pink. The detection limit was found to be 3.94 x 10⁻¹¹ M. FT is capable of sensing As³⁺ colorimetrically and fluorimetrically and displays sub-ppb detection limit.

Actions (login required)

View Item