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Solvent-dependent luminescence of eight-coordinated Eu(III) complexes with bidentate phosphine oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
26995 43992 2012 5 PDF Available
Title
Solvent-dependent luminescence of eight-coordinated Eu(III) complexes with bidentate phosphine oxide
Abstract

Solvent-dependent luminescence of Eu(III) complexes composed of oxo-linked bidentate phosphine oxide ligands, 4,5-bis(diphenylphosphoryl)-9,9-dimethylxanthene (xantpo), 4,5-bis(di-tert-butylphosphoryl)-9,9-dimethylxanthene (tBu-xantpo) and low-vibrational frequency hexafluoroacetylacetonato (hfa) ligands is reported. The Eu(III) complexes, Eu(hfa)2(xantpo)2 and Eu(hfa)3(tBu-xantpo), exhibit eight-coordinated square antiprism and trigonal dodecahedron structure, respectively. Their emission quantum yield, emission lifetime, and radiative and non-radiative rate constant are characterized using acetone, acetone-d6, toluene, chloroform, and DMF. The relationship between photophysical properties and coordination structures of eight-coordinated Eu(III) complexes is discussed for the first time.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Solvent-dependent luminescence of Eu(III) complexes is reported. ► The Eu(III) complexes, Eu(hfa)2(xantpo)2 and Eu(hfa)3(tBu-xantpo), exhibit eight-coordinated squre antiprism and trigonal dodecahedron structure, respectively. ► Their emission quantum yield, emission lifetime, and radiative and non-radiative rate constant are characterized using acetone, acetone-d6, toluene, chloroform, and DMF. ► The relationship between photophysical properties and coordination structures is discussed for the first time.

Keywords
Complex; Eu(III); Luminescence; Solvent effect
First Page Preview
Solvent-dependent luminescence of eight-coordinated Eu(III) complexes with bidentate phosphine oxide
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 235, 1 May 2012, Pages 35–39
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering