Journal
CHEMICAL COMMUNICATIONS
Volume 47, Issue 35, Pages 9834-9836Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cc13297k
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Funding
- NNSFC [20825103, 90922031, 21021061]
- MSTC [2007CB815304]
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Four lanthanide-based metal-organic frameworks, [Emim][Ln(1.5) (2,5-tdc)(2)]Cl1.5-xBrx(Ln = Nd 1, Eu 2) and [Emim][Ln(2,5-tdc)(2)] (Ln = Nd 3, Eu 4) (2,5-tdc = thiophene-2,5-dicarboxylate, Emim = 1-methyl-3-ethylimidazolium), were synthesized under ionothermal conditions. Compounds 1 and 2 crystallize in the polar space group P2(1)2(1)2, while 3 and 4 crystallize in the central symmetry space group P2(1)/c. Luminescence studies revealed a significantly higher quantum yield of 4 than that of 2, with similar lifetimes. It is clear that the coordination of the halide ions has profound effects on the structures and properties of these lanthanide-based metal-organic frameworks.
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