Chiral Sensing Using an Achiral Europium(III) Complex by Induced Circularly Polarized Luminescence

被引：58

作者：

Iwamura, Munetaka ^{[1
]}

Kimura, Yoshihiro ^{[1
]}

Miyamoto, Risa ^{[1
]}

Nozaki, Koichi ^{[1
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 07期

关键词：

METAL-ION BINDING; PHOTOPHYSICAL PROPERTIES; LANTHANIDE COMPLEXES; ABSOLUTE-CONFIGURATION; COORDINATION CHEMISTRY; TERBIUM(III); RECOGNITION; DICHROISM; SITES; PROBE;

D O I：

10.1021/ic202355s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

[Eu(bda)(2)](-) (bda = 2,2'-bipyridine-6,6'-dicarboxylic acid) produces intense circularly polarized luminescence (CPL) in aqueous solutions in the presence of (S)-2-pyrrolidone-S-carboxylic acid upon UV irradiation, although the molecular structure of the europium(III) complex is achiral. The mechanism for the induction of CPL was preliminarily attributed to distortions induced by association with an amino acid to generate chirality in the achiral complex. The optical anisotropy factor (g(lum) value) for the D-5(0)-> F-7(1) transition was 0.03 in the presence of 1.0 mol dm(-3) of the amino acid. Analysis of the CPL intensity as a function of the amino acid concentration gave an association constant between those of [Eu(bda)(2)](-) and the amino acid, K-aso = 0.55 +/- 0.09 mol(-1) dm(3). These results demonstrate the potential of [Eu(bda)(2)](-) to act as a luminescent chiral-sensing reagent in microscopic spectroscopy.

引用

页码：4094 / 4098

页数：5

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