A highly luminescent Eu(iii) complex based on an electronically isolated aromatic ring system with ultralong lifetime. Issue 21 (17th May 2018)

• Record Type: Journal Article
• Authors: Kitagawa, Yuichi; Suzue, Fumiya; Nakanishi, Takayuki; Fushimi, Koji; Hasegawa, Yasuchika
• Is Part Of: Dalton transactions. Volume 47:Issue 21(2018)
• Page Start: 7327
• Page End: 7332
• Publication Date: 2018-05-17
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt00883c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A Eu(iii ) complex with a large electronically isolated aromatic ring system induces a brilliant luminescence. 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.