A Novel Rhodamine-Benzimidazole Conjugate as a Highly Selective Turn-on Fluorescent Probe for Fe3+

被引：59

作者：

Li, Junbo ^{[1
]}

Hu, Qihui ^{[1
]}

Yu, Xianglin ^{[1
]}

Zeng, Yang ^{[1
]}

Cao, Cancan ^{[1
]}

Liu, Xiwen ^{[1
]}

Guo, Jia ^{[1
]}

Pan, Zhiquan ^{[1
]}

机构：

[1] Wuhan Inst Technol, Hubei Novel Reactor & Green Chem Technol Key Lab, Key Lab Green Chem Proc, Minist Educ, Wuhan 430074, Hubei Province, Peoples R China

来源：

JOURNAL OF FLUORESCENCE | 2011年 / 21卷 / 05期

基金：

美国国家科学基金会;

关键词：

Fluorescent probe; Rhodamine; Benzimidazole; Iron ion; AQUEOUS-SOLUTION; CHEMOSENSOR; CHEMODOSIMETER; HG2+; IRON(III); ION; COMPLEXES; SENSORS; CU(II); COPPER;

D O I：

10.1007/s10895-011-0901-8

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

In this manuscript, a novel probe RHBI based on the rhodamine-benzimidazole conjugate was designed and synthesized. RHBI showed an extreme selectivity for Fe3+ over other metal ions such as Pb2+, Ni2+, Co2+, Mn2+, Zn2+, Hg2+, Cd2+, Ag+, Mg2+, Ca2+, Ba2+, Na+ and K+ in acetonitrile. Upon the addition of 10 equiv. of Fe3+, a 1098-fold fluorescence intensity enhancement was observed at the maximum emission wavelength of 582 nm. Both the Job's plot and ESI-MS showed that RHBI coordinated with Fe3+ in a 1:1 stoichomitry and the calculated binding constant was 1.01 x 10(4) M-1. The competition experiment for Fe3+ ions mixed with other metal ions exhibited no obvious change except Cu2+ that could induce a mild fluorescence quenching. Moreover, the fluorescence emission increased linearly with the Fe3+ concentration in the range of 6 x 10(-6)-4 x 10(-5) M and the detection limit was 1.5 x 10(-8) M.

引用

页码：2005 / 2013

页数：9

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