Chiral sensing using an achiral europium(III) complex by induced circularly polarized luminescence

Munetaka Iwamura; Yoshihiro Kimura; Risa Miyamoto; Koichi Nozaki

doi:10.1021/ic202355s

Chiral sensing using an achiral europium(III) complex by induced circularly polarized luminescence

Munetaka Iwamura^*, Yoshihiro Kimura, Risa Miyamoto, Koichi Nozaki

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

[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-5-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 ⁵D ₀ → ⁷F 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.

Original language	English
Pages (from-to)	4094-4098
Number of pages	5
Journal	Inorganic Chemistry
Volume	51
Issue number	7
DOIs	https://doi.org/10.1021/ic202355s
State	Published - 2012/04/02

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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@article{f2e05808e40e43d793dcb2ce43d84bf8,

title = "Chiral sensing using an achiral europium(III) complex by induced circularly polarized luminescence",

abstract = "[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-5-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 5D 0 → 7F 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.",

author = "Munetaka Iwamura and Yoshihiro Kimura and Risa Miyamoto and Koichi Nozaki",

year = "2012",

month = apr,

day = "2",

doi = "10.1021/ic202355s",

language = "英語",

volume = "51",

pages = "4094--4098",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Chiral sensing using an achiral europium(III) complex by induced circularly polarized luminescence

AU - Iwamura, Munetaka

AU - Kimura, Yoshihiro

AU - Miyamoto, Risa

AU - Nozaki, Koichi

PY - 2012/4/2

Y1 - 2012/4/2

N2 - [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-5-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 5D 0 → 7F 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.

AB - [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-5-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 5D 0 → 7F 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.

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U2 - 10.1021/ic202355s

DO - 10.1021/ic202355s

M3 - 学術論文

C2 - 22414194

AN - SCOPUS:84859255844

SN - 0020-1669

VL - 51

SP - 4094

EP - 4098

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 7

ER -

Chiral sensing using an achiral europium(III) complex by induced circularly polarized luminescence

Abstract

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