A new "ON-OFF" fluorescent and colorimetric chemosensor based on 1,3,4-oxadiazole derivative for the detection of Cu2+ ions

被引：45
作者：
Wang, Lin [1 ]
Bing, Qijing [1 ]
Li, Jianxin [1 ]
Wang, Guang [1 ]
机构：
[1] Northeast Normal Univ, Fac Chem, Changchun 130024, Jilin, Peoples R China
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2018年 / 360卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Chemosensor; Fluorescence; Colorimetric; Oxadiazole; Copper ion; SENSITIVE DETERMINATION; AQUEOUS-SOLUTION; WATER SAMPLES; COPPER; SENSOR; ANION; FE3+;
D O I：
10.1016/j.jphotochem.2018.04.015
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A symmetrical oxadiazole derivative (OXD) containing two pyrazole moieties was synthesized successfully and characterized by single crystal X-ray diffraction, nuclear magnetic resonance and mass spectrometry. The synthesized compound displayed "On-Off" fluorescent sensing towards Cu2+ with high selectivity and sensitivity. Fluorescence and UV-vis absorbance spectra studies demonstrated that the proposed sensor can detect Cu2+ directly in acetonitrile solution over a wide range of metal ions including Ag+, Na+, K+, Hg2+, Mg2+, Cd2+, Co2+, Ni2+, Zn2+, Fe2+, Pb2+, Ca2+, Mn2+, Ba2+, Fe3+, Al3+, and Cr3+. Moreover, the synthesized sensor exhibits an instantaneous naked-eye color change from colorless to yellow with the presence of Cu e ' ion. The fluorescence intensity of the sensor has shown a linear response to Cu2+ in the concentration range of 0-15 mu M with a detection limit of 2.14 mu M. Fluorescence titration, H-1 NMR spectrum, ESI-MS, and DFT calculation confirmed that fluorescence quenching is caused by the complex formation between the sensor and Cu2+ with 1:1 stoichiometry. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：86 / 94
页数：9
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