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

Hirai Y; Nakanishi T; Kitagawa Y; Fushimi K; Seki T; Ito H; Fueno H; Tanaka K; Satoh T; Hasegawa Y

Inorganic Chemistry, Vol.54, No.9, 4364-4370, 2015

DOI10.1021/acs.inorgchem5b00145 Export Citation

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

Hirai Y, Nakanishi T, Kitagawa Y, Fushimi K, Seki T, Ito H, Fueno H, Tanaka K, Satoh T, Hasegawa Y

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 degrees C) and strong luminescence properties (phi(Ln) = 72-94%).