A series of copper and 1,3-phenylebis(azanetriyl)tetrabenzoate based MOFs were obtained by postsynthetic modification of DUT-71 (DUT = Dresden University of Technology) using various nitrogen containing, neutral ligands to afford the compounds DUT-74, DUT-95, DUT-112, and DUT-114. The structure of the new MOFs DUT-112 and DUT-114 was solved from synchrotron X-ray single-crystal diffraction data. Both structures are tetragonal (P4/mnc) but differ slightly in the lattice parameters. All materials show specific shifts in absorption bands in solid state UV/vis spectra as a response to the exposure to various analytes. Analyzing this shift, it was possible to distinguish between solvents differing in polarity. Moreover, the determination of the polar analyte content in the excess of lower polarity solvent at low concentrations of 0.01 wt % is feasible.

中文翻译：

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使用溶剂变色金属有机框架的光学传感器

通过使用各种含氮中性配体对DUT-71（DUT =德累斯顿工业大学）进行后期合成修饰，获得了一系列基于铜和1,3-苯基双（氮杂三氮杂）四苯甲酸酯的MOF，得到化合物DUT-74，DUT- 95，DUT-112和DUT-114。新型MOF DUT-112和DUT-114的结构是通过同步加速器X射线单晶衍射数据解决的。两种结构均为四边形（P 4 / mnc），但晶格参数略有不同。所有材料在固态UV / vis光谱中均显示出吸收带的特定变化，这是对各种分析物暴露的响应。分析该变化，可以区分极性不同的溶剂。而且，在0.01wt％的低浓度下测定过量的较低极性溶剂中的极性分析物含量是可行的。