Dipyrrolyl quinoxalines with extended chromophores are efficient fluorimetric sensors for pyrophosphateElectronic supplementary information (ESI) available: experimental data. See http://www.rsc.org/suppdata/cc/b3/b301362f/
Photophysical Studies of Anion-Induced Colorimetric Response and Amplified Fluorescence Quenching in Dipyrrolylquinoxaline-Containing Conjugated Polymers
作者:Cheng-Yang Wu、Min-Shen Chen、Chih-An Lin、Su-Ching Lin、Shih-Sheng Sun
DOI:10.1002/chem.200500804
日期:2006.3.1
synthesized and employed as chromogenic and fluorescent chemosensors for inorganic anions. We have found that in the presence of fluoride or pyrophosphate, the receptors do not form hydrogen bonds between the pyrrole protons and anions. The colorimetric responses and fluorescence quenching in these chemosensors are indeed the result of deprotonation of the N-H proton. The anion selectivity is primarily
A new approach to sensing of aqueous phosphate-related anions based on chromogenic conductive polymers is demonstrated. The anion-sensor affinity can be adjusted by externally applied voltage. Introduction of p-doping to the polymers results in augmented anion sensitivity, which is ascribed to the effect of synergy between low-level p-doping in a polythiophene polymer and hydrogen bonding. The chromogenic conductive polymer films display anion-specific changes in color, conductivity, and mass upon increasing concentration of anions. (C) 2004 Elsevier Ltd. All rights reserved.