Off-On-Off fluorescence behavior of an intramolecular charge transfer probe toward anions and CO2

被引：23

作者：

Ali, Rashid ^{[1
]}

Razi, Syed S. ^{[1
]}

Shahid, Mohammad ^{[1
]}

Srivastava, Priyanka ^{[1
]}

Misra, Arvind ^{[1
]}

机构：

[1] Banaras Hindu Univ, Inst Sci, Dept Chem, Varanasi 221005, UP, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2016年 / 168卷

关键词：

TCPPI; ICT; F-; CN- and CO2; STRUCTURAL-CHARACTERIZATION; COLORIMETRIC CHEMOSENSORS; FLUORIDE IONS; CYANIDE ION; RECOGNITION; NAPHTHALIMIDE; RECEPTORS; SENSOR; CU2+; CHEMISTRY;

D O I：

10.1016/j.saa.2016.05.045

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The photophysical behavior of a newly developed fluorescent probe, tricyanoethylphenyl phenanthroimidazole (TCPPI) has been studied. Upon interaction of different class of anions TCPPI displayed naked-eye sensitive fluorescence "turn-on" response to detect selectively F- (0.98 mu M,18.62 ppb) and CN- (1.12 M, 29.12 ppb) anions in acetonitrile (MeCN). Job's plot analysis revealed a 1:1 binding stoichiometry between probe and anions. The spectral data analysis and 1H NMR titration studies suggested about the affinity of F- and CN- anions with moderately acidic -NH fragment of imidazolyl unit of probe through deprotonation and H-bonding interaction. Moreover, the anion activated probe upon interaction with CO2 revived photophysical properties of probe, "On-Off-On" type fluorescence and enabled anion-induced CO2 sensing in the medium. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：21 / 28

页数：8

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