Two new metal organic frameworks (MOFs) were synthesized by solvent-thermal synthesis with fluorinated 4,4′-(pyridine-3, 5-diyl) bis (3-fluorobenzoic acid) ligands (L1), namely {[Cd(L1)H2O]·DMF}n (MOF 1) and {[Zn(L1)]·3H2O}n (MOF 2). Single crystal X-ray diffraction analysis shows that MOF 1 is a two-dimensional structure with binuclear unit of [Cd2(COO)4N2O2]. MOF 2 displays a three-dimensional structure based on binuclear unit of Zn2(COO)2. The PXRD determination demonstrates the purity of the synthesized MOF 1 and MOF 2 samples, while the TGA shows the thermal stability of the structures. The gas adsorption studies show that MOF 1 and MOF 2 exhibit good gas adsorption characteristics, and MOF 2 has high selectivity for C2H2/CH4. Moreover, both MOF 1 and MOF 2 can selectively and sensitively detect Fe3+ in water.

中文翻译：

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基于相同氟化配体的Cd2+和Zn2+金属有机骨架的气体吸附和荧光研究


以氟化4,4'-(吡啶-3, 5-二基)双(3-氟苯甲酸)配体(L1)为溶剂热合成法合成了两种新型金属有机框架(MOF)，即{[Cd(L1) H2O]·DMF}n (MOF 1) 和 {[Zn(L1)]·3H2O}n (MOF 2)。单晶X射线衍射分析表明MOF 1 是具有[Cd2(COO)4N2O2]双核单元的二维结构。 MOF 2 显示出基于 Zn2(COO)2 双核单元的三维结构。 PXRD 测定证明了合成的 MOF 1 和 MOF 2 样品的纯度，而 TGA 显示了结构的热稳定性。气体吸附研究表明MOF 1 和MOF 2 表现出良好的气体吸附特性，且MOF 2 对C2H2/CH4 具有较高的选择性。此外，MOF 1 和MOF 2 都可以选择性、灵敏地检测水中的Fe3+。