Shukla Adarash Kumar, Sisodiya Dilawar Singh, Chattopadhyay Anjan, Bhattacharya Anupam
Department of Chemistry, Birla Institute of Technology and Science-Pilani (Hyderabad Campus), Hyderabad 500078, India.
Department of Chemistry, Birla Institute of Technology and Science-Pilani (KK Birla Goa Campus), NH 17B, Bypass, Road, Zuarinagar, Sancoale 403726, Goa, India.
J Phys Chem B. 2023 Nov 23;127(46):10025-10034. doi: 10.1021/acs.jpcb.3c05936. Epub 2023 Nov 9.
Molecules relying on the excited-state intramolecular proton transfer/excited-state proton transfer (ESIPT/ESPT) mechanism are widely used in material science. In the current work, a known β-carboline-based probe TrySy was used to selectively detect explosive trinitrotoluene (TNT) in water. Compared to conventional TNT sensing, which relies mainly on the quenching of the fluorescence signal, TrySy could perform nanomolar detection of TNT via ESPT destabilization and AIE, with a significant fluorescence output. The mechanism followed was validated by computational and experimental results.
