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

Dalton Transactions : an International Journal of Inorganic Chemistry
Yuichi KitagawaYasuchika Hasegawa

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.

References

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Citations

Mar 3, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuichi KitagawaYasuchika Hasegawa
Sep 3, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alexey E KaluginDmitrii M Roitershtein
Jul 4, 2020·Chemistry : a European Journal·Yuichi KitagawaYasuchika Hasegawa
Jul 20, 2021·The Journal of Physical Chemistry Letters·Yoshinori Okayasu, Junpei Yuasa
Aug 20, 2021·Chemistry : a European Journal·Teng ZhangYasuchika Hasegawa
Oct 6, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Yuichi KitagawaYasuchika Hasegawa

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Methods Mentioned

BETA
phosphorescence
X-ray

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