| 基于一个四羧酸配体的镧系金属-有机框架材料及其对有机小分子的检测 | |
| Two Lanthanide Metal-Organic-Frameworks Based on a Tetra-carboxylate Ligand for Sensing of Small Organic Molecules | |
| 摘要: 以四羧酸3，5-双间苯二甲酸-1，2，4-三氮唑（H4L）为配体，与镧系金属Ln（Ⅲ）盐反应，自组装合成了2个具有三维孔洞结构的镧系金属-有机框架材料（Ln-MOFs）：{[Ho3L2（H2O）6]OH·2DMF}n（1），{[Tb3L2（H2O）6]OH·2DMF}n（2）。单晶X射线衍射分析表明，1与2属于异质同构晶体，为单斜晶系C2/m空间群。3个Ln（Ⅲ）离子通过8个羧基桥联形成三核[Ln3（COO）8]次级结构单元，晶体由[Ln3（COO）8]次级结构单元相互连接形成一维无机链，链与链之间通过配体L4-相连形成具有一维孔道的三维网络结构。有机小分子溶剂交换荧光研究表明，2在硝基苯溶剂中表现出荧光猝灭现象，Tb-MOF材料对硝基苯等爆炸物具有良好的荧光探测功能。 | |
| 关键词: 3,5-双间苯二甲酸-1,2,4-三氮唑 稀土 金属-有机框架材料 晶体结构 荧光性质 | |
| 基金项目: 国家自然科学基金（No.21173197）资助项目。 | |
| Abstract: 5,5'-(1H-1,2,4-triazole-1,4-diyl)diisophthalic acid (H4L) was used to synthesize two microporous three-dimension metal-organic-frameworks(MOFs) with lanthanide metal salts by intermolecular self-assembly:{[Ho3L2(H2O)6]OH·2DMF}n (1), {[Tb3L2(H2O)6]OH·2DMF}n (2). Single-crystal X-ray diffraction revealed the Ln-MOFs are isomorphous and belong to monoclinic C2/m space group. Three Ln(Ⅲ) ions are connected through eight carboxylic groups to form a trinuclear[Ln3(COO)8] SBU. The SBU polyhedrons share edges with each other generating a 1D inorganic chain, and the chains are further connected by the L4- ligands to construct a 3D framework. The luminescence intensity of 2 can be modulated by organic small molecules, and 2 exhibited the significant quenching in nitrobenzene, which indicates that 2 is potential luminescent sensing material for nitro explosives. | |
| Keywords: 5,5'-(1H-1,2,4-triazole-1,4-diyl)diisophthalic acid rare-earth metal metal-organic framework crystal structure luminescent property | |
| 投稿时间：2017-06-19 修订日期：2017-11-13 | |
| 摘要点击次数: 1954 | |
| 全文下载次数: 1548 | |
| 林建军,刘珍,吕灵芝,冯云龙.基于一个四羧酸配体的镧系金属-有机框架材料及其对有机小分子的检测[J].无机化学学报,2018,34(2):230-236. | |
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