Novel indole based colorimetric and “turn on” fluorescent sensors for biologically important fluoride anion sensing
作者:Qian Li、Yong Guo、Jian Xu、Shijun Shao
DOI:10.1016/j.jphotobiol.2011.02.021
日期:2011.5
A novel indole Hydrazone receptor 1 has been synthesized by one step of condensation, which can act as an efficient colorimetric and "turn on" fluorescent sensor for fluoride anions; Benesi-Hildebrand equation indicates that 1 associates with F- in a 1:1 stoichiometry; [TBA]OH and H-1 NMR titration experiments indicate that the deprotonation process involved upon addition of fluoride anions. (C) 2011 Elsevier B.V. All rights reserved.
Ratiometric and Selective Fluorescent Sensor for F− Based on Intramolecular Charge Transfer (ICT)
作者:Yaping Li、Hai Lin、Huakuan Lin
DOI:10.1007/s10895-010-0681-6
日期:2010.11
A simple colorimetric and ratiometric fluorescent anion sensor 1, was rationally designed and synthesized by facile one-step condensation on basis of the mechanism of intramolecular charge transfer (ICT). The sensor 1 shows more highly and selectively ability to F− that induced the color changes from little yellow to purple, absorption-transferred to long wavelength and emission-transferred to short wavelength. Accordingly, 1H NMR analysis reveals that the F−-induced colorimetric and fluorometric responses of 1 are simply driven by hydrogen bonding interaction between the NH protons and F− ions.