Inorganic Chemistry · 2015 · 58 citations · 38 references
Natural SciencesChemistryMaterials ScienceInorganic ChemistryMaterials ChemistryOptical MaterialsCoordination ChemistryCoordination PolymersCrystal ChemistryCrystallographyLuminescent MaterialsOptical GlassesCoordinationGlass TransitionGlass Transition TemperatureLanthanide ComplexesLanthanide Coordination ChemistryLanthanide Coordination PolymersLuminescent Coordination CompoundsSingle-crystal X-ray Diffraction
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 (Tg = 25-96 °C) and strong luminescence properties (ΦLn = 72-94%).
38