| 一个三羧酸配体构筑的铽金属-有机框架材料及对小分子溶剂的荧光识别 |
| One Terbium-Metal Organic Framework Based on a Tricarboxylate Ligand for Sensing of Small Molecule Solvents |
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| 摘要: 以3-羟基-5-（3，5-二甲酸-苯氧基）苯甲酸（H3L）为配体，在溶剂热条件下与硝酸铽反应得到1个具有二维平面结构的镧系金属-有机框架材料（Tb-MOF）：{[TbL（H2O）]·3H2O·DMF}n。单晶X射线衍射分析表明，Tb-MOF为正交晶系Ibca空间群。2个Tb（Ⅲ）离子通过6个羧基桥联形成双核[Ln2（COO）6]次级结构单元，晶体由[Ln2（COO）6]次级结构单元相互连接形成具有左手或右手螺旋结构的一维无机链，左手螺旋链与右手螺旋链通过配体L3-相连形成二维层状结构。有机小分子溶剂交换荧光研究表明，Tb-MOF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潜在良好的荧光探测功能。 |
| 关键词: 3-羟基-5-(3,5-二甲酸-苯氧基)苯甲酸 铽 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: 3-Hydroxyl-5-(3,5-dicarboxylphenxoy)benzoic acid (H3L) was used to synthesize a metal-organic frame-work with Tb(NO3)3·6H2O under solvothermal condition:{[TbL(H2O)]·3H2O·DMF}n. Single-crystal X-ray diffraction revealed that Tb-MOF belongs to orthorhombic Ibca space group. Two Tb（Ⅲ） ions are connected through six carboxylic groups to form a dinuclear[Tb2(COO)6] SBU. The SBU polyhedrons share three carboxylic groups with each other generating a 1D inorganic chain with left-handed or right-handed spiral axes, and the chains are further alternately connected by the L3- ligands to construct a 2D framework. The luminescence intensity can be modulated by organic small molecule solvents, and Tb-MOF exhibits highly selective and sensitive sensing for small organic molecules. The significant quenching in nitrobenzene indicates that it is potential luminescent sensing material for nitro explosives. |
| Keywords: 3-hydroxyl-5-(3,5-dicarboxylphenxoy)benzoic acid terbium metal-organic framework crystal structure luminescent property |
| 投稿时间：2018-10-08 修订日期：2019-03-08 |
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| 林鸿,吕灵芝,冯云龙.一个三羧酸配体构筑的铽金属-有机框架材料及对小分子溶剂的荧光识别[J].无机化学学报,2019,35(5):787-792. |
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