• Ratiometric fluorescence signalling of fluoride ions by an amidophthalimide derivative

• # Fulltext

https://www.ias.ac.in/article/fulltext/jcsc/119/02/0091-0097

• # Keywords

Chemosensor; ratiometric fluorescence signalling; fluoride ion; proton transfer; density functional calculation.

• # Abstract

Fluorescence behaviour of 4-benzoylamido-N-methylphthalimide (1), designed and developed for selective detection of fluoride ions, is reported. 1 displays $F^-$-induced colour change that allows its detection with the naked eye. The $F^-$ specificity of the sensor system is evident from the fact that unlike $F^-$, other halides do not affect the absorption characteristics of 1. Apart from the colorimetric response, the fluorescence output of 1 is also modulated by $F^-$ in a manner that permits ratiometric fluorescence signalling of $F^-$ as well. It is found that the system can detect $F^-$ in the concentration range of $10^-$ 60 𝜇M. The results of the experiments and theoretical calculations unambiguously suggest that the changes of the electronic absorption and fluorescence behaviour of 1, which have been exploited for signalling purpose, are due to $F^-$-induced deprotonation of the 4-amido moiety of the sensor system.

• # Author Affiliations

2. Training School, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085

• # Journal of Chemical Sciences

Volume 134, 2022
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019