| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5397762 | Journal of Luminescence | 2017 | 6 Pages |
Abstract
A novel red-emission sulfonamidoquinoline-based derivative (2-PyTSQ) with visible excitation was synthesized as an off-on type fluorescent sensor for distinguishing group IIB cations from common metal ions. When excited at 422Â nm, 2-PyTSQ displayed the longer wavelength emission (>600Â nm) with a remarkable fluorescence enhancement upon Zn2+, Cd2+, or Hg2+ coordination in aqueous solution, respectively. A 2:1 stoichiometry was found for the complexes formed by 2-PyTSQ and these cations. And the binding constants (logKs) gradually decreased from 9.45 to 8.96 as ionic radius of group IIB cations increased. Moreover, fluorescence imaging studies revealed that 2-PyTSQ was a cell-permeable and Cd2+-responsive reagent in yeast cells.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yu Zhang, Xiangfeng Guo, Libo Zheng, Lihua Jia,