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Ratiometric Fluorescent Chemosensor for Selective Detection Cr 3+ based on Carbazole and Benzimidazole
Author(s) -
Zhu Weiju,
Fang Min,
Zhang Qing,
Xu Ying,
Wu Zhenyu,
Li Cun
Publication year - 2018
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201700336
Subject(s) - chemistry , benzimidazole , carbazole , fluorescence , photochemistry , combinatorial chemistry , nanotechnology , organic chemistry , physics , quantum mechanics , materials science
A novel Cr 3+ ‐selective ratiometric fluorescent chemosensor 1‐substitued‐2‐carbazoleylbenzoimidazole ( L ) based on benzimidazole and carbazole was synthesized and characterized by nuclear magnetic resonance ( 1 H/ 13 C NMR), Fourier transform infrared spectrometry (FTIR), and mass spectroscopy. L could selectively detect Cr 3+ over other metal ions by UV–vis absorption and fluorescence emission spectroscopic methods in CH 3 CN. L showed ratiometric fluorescent recognition of Cr 3+ ; the fluorescent responses could be observed by naked eye under a UV lamp. The binding stoichiometry ratio of the L –Cr 3+ complex was found to be 1:1 according to Job’s plot and MALDI‐TOF MS analysis. The results of DFT calculation supported this conclusion.