A simple donor-acceptor probe for the detection of Cr3+ cations

被引：17

作者：

Xu, Yunlong ^{[1
]}

Yang, Wen ^{[1
]}

Shao, Jie ^{[1
]}

Zhou, Weiqun ^{[1
]}

Zhu, Wei ^{[1
]}

Xie, Juan ^{[1
]}

机构：

[1] Soochow Univ, Sch Chem & Chem Engn & Mat Sci, Suzhou, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 30期

基金：

中国国家自然科学基金;

关键词：

TRIPLE FLUORESCENCE; CHEMOSENSOR; CR(III); CR(VI); SENSOR; RECOGNITION; BENZANILIDE; ANIONS; WATER; IONS;

D O I：

10.1039/c4ra00034j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

simple probe (1, 1-(4-cyano-phenyl)-3-(4-dimethylamino-phenyl)-thiourea)) is prepared as a ligand for metal ions and characterized by elemental analysis, nuclear magnetic resonance (H-1/C-13 NMR), mass spectroscopy and Fourier transform infrared spectrometry (FTIR). The probe exhibits fluorescence enhancement upon exposure to chromium(III) in THF-water (v/v 9/1) buffer solution (trihydroxymethyl aminomethane-hydrochloric acid (Tris-HCl), pH 7.4). A chelation photo-induced electronic transfer (PET) mechanism is introduced to explain the enhancement of the fluorescence and its high selectivity and sensitivity. It is found that the probe has a detection limit of 8.18 X 10(-7) M. Furthermore, fluorescence imaging experiments of the exciplex (1@ Cr3+) in living human glioma cells (U251) evidence its potential for practical application in biological systems.

引用

页码：15400 / 15405

页数：6