Novel dithieno-benzo-imidazole-based Pb2+ sensors: substituent effects on sensitivity and reversibility
作者:Rudrakanta Satapathy、Yen-Hsing Wu、Hong-Cheu Lin
DOI:10.1039/c2cc31131c
日期:——
Two novel dithieno-benzo-imidazole-based compounds (M2 and A2) showed remarkable sensitivities towards Pb2+ by 12-fold enhancement and 10-fold decay of fluorescence, respectively, in aqueous solutions. Substituent effects of different dithieno-benzo-imidazole-based moieties (M1, M2, A1 and A2) on the quantum yields, fluorescence lifetimes and sensitivities to Pb2+ along with the reversibilities by S2− were investigated.
Poly(benzodithieno-imidazole-alt-carbazole) based π-conjugated copolymers: Highly selective and sensitive turn-off fluorescent probes for Hg2+
作者:Dipanjan Giri、Arindam Bankura、Sanjib K. Patra
DOI:10.1016/j.polymer.2018.10.069
日期:2018.12
common organic solvents, heptyl (in P1) or 2-(2-(2-methoxyethoxy)ethoxy)ethyl (in P2) substituents have been introduced at benzodithieno-imidazole and 9-position of carbazole unit. The well-defined and soluble π-conjugated polymers have been characterized by multinuclear NMRspectra as well as by tetradetector GPC studies showing molecular weight (Mn) of 16.5 and 14.3 kDa with the polydispersity indices