Luminescent Coordination Glass: Remarkable Morphological Strategy for Assembled Eu(III) Complexes

Syntheses of novel luminescent Eu­(III) coordination glasses 1 ([Eu­(hfa)3(o-dpeb)]2), 2 ([Eu­(hfa)3(m-dpeb)]3), and 3 ([Eu­(hfa)3(p-dpeb)] n ) are reported. They are composed of Eu­(III) ions, hexafluoroacetylacetonato (hfa) ligands, and unique bent-angled phosphine oxide (o-, m-, p-dpeb) ligands w...

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Published in:Inorganic chemistry 2015-05, Vol.54 (9), p.4364-4370
Main Authors: Hirai, Yuichi, Nakanishi, Takayuki, Kitagawa, Yuichi, Fushimi, Koji, Seki, Tomohiro, Ito, Hajime, Fueno, Hiroyuki, Tanaka, Kazuyoshi, Satoh, Toshifumi, Hasegawa, Yasuchika
Format: Article
Language:English
Subjects:
Benzene
Formability
Glass
Ligands
Luminescence
Mathematical analysis
Strategy
X-rays
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Summary:Syntheses of novel luminescent Eu­(III) coordination glasses 1 ([Eu­(hfa)3(o-dpeb)]2), 2 ([Eu­(hfa)3(m-dpeb)]3), and 3 ([Eu­(hfa)3(p-dpeb)] n ) are reported. They are composed of Eu­(III) ions, hexafluoroacetylacetonato (hfa) ligands, and unique bent-angled phosphine oxide (o-, m-, p-dpeb) ligands with ethynyl groups. Their coordination structures and glass formability are dependent on the regiochemistry of substitution in regard to the internal benzene core. Single-crystal X-ray analyses and DFT calculation reveals dinuclear, trinuclear, and polymer structures for Eu­(III) coordination glasses 1, 2, and 3, respectively. Those compounds show characteristic glass-transition (T g = 25–96 °C) and strong luminescence properties (ΦLn = 72–94%).
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.5b00145