Three new metal-organic frameworks based on sulfur-containing 2,2′-bithiophene-5,5′-dicarboxylic acid (H2btdc) and thieno[3,2-b]thiophene-2,5-dicarboxylic acid (H2ttdc) are obtained. Their compositions are: [Eu(DMF)2(NO3)(btdc)]·DMF (1), [Eu2(H2O)2(DMF)(btdc)3]·H2O·3DMF (2), and [Eu2(DMF)4(ttdc)3]· 4DMF (3). Structures of the compounds are determined by single crystal X-ray diffraction: 1 is a layered compound whereas 2 and 3 have a three-dimensional framework with channel-like pores. The specific volume of cavities in the structures of 1-3 varies from 34% to 37%. Compounds 2 and 3 are characterized by IR spectroscopy, elemental and thermogravimetric analyses. The luminescent properties of solid samples of 3 are studied and a luminescent response (a threefold excess of the luminescence quantum yield of the 3⊃cyclohexane adduct in comparison with 3⊃benzene) is revealed.

中文翻译：

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具有噻吩配体的欧 (III) 配位聚合物的结构和发光性能

获得了三种基于含硫 2,2'-二噻吩-5,5'-二羧酸 (H2btdc) 和噻吩并[3,2-b]噻吩-2,5-二羧酸 (H2ttdc) 的新型金属有机骨架. 它们的组成为：[Eu(DMF)2(NO3)(btdc)]·DMF (1)，[Eu2(H2O)2(DMF)(btdc)3]·H2O·3DMF (2)，和 [Eu2(DMF) )4(ttdc)3]·4DMF (3)。化合物的结构由单晶X射线衍射确定：1是层状化合物，而2和3具有具有通道状孔的三维骨架。1-3 结构中空腔的比容从 34% 到 37% 不等。化合物 2 和 3 通过红外光谱、元素和热重分析表征。