Issue 21, 2018

A highly luminescent Eu(iii) complex based on an electronically isolated aromatic ring system with ultralong lifetime

Abstract

A luminescent Eu(III) complex with a large electronically isolated aromatic ring system, Eu(hfa)3(DPPTO)2 (where hfa denotes hexafluoroacetylacetonate and DPPTO denotes 2-diphenylphosphoryltriphenylene), is reported. The light-harvesting efficiency of the Eu(III) complex was assessed from electronic absorption spectra. Luminescence properties were evaluated from luminescence spectra, excitation spectra, luminescence quantum yields, and luminescence lifetimes. A remarkably brilliant luminescence was observed because of the strong light absorption and the high luminescence quantum yield of the Eu(III) complex. Density functional theory calculations indicated an electronic separation between the energy-donating large π-conjugated orbital and the energy-accepting Eu(III) orbital. These findings demonstrate that novel Eu(III) photophysics can be induced by large electronically isolated aromatic ring systems.

Graphical abstract: A highly luminescent Eu(iii) complex based on an electronically isolated aromatic ring system with ultralong lifetime

Supplementary files

Article information

Article type
Paper
Submitted
07 Mar 2018
Accepted
25 Apr 2018
First published
17 May 2018

Dalton Trans., 2018,47, 7327-7332

A highly luminescent Eu(III) complex based on an electronically isolated aromatic ring system with ultralong lifetime

Y. Kitagawa, F. Suzue, T. Nakanishi, K. Fushimi and Y. Hasegawa, Dalton Trans., 2018, 47, 7327 DOI: 10.1039/C8DT00883C

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