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  被引量:3

One Terbium-Metal Organic Framework Based on a Tricarboxylate Ligand for Sensing of Small Molecule Solvents

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作  者:林鸿 吕灵芝 冯云龙[1] LIN Hong;LU Ling-Zhi;FENG Yun-Long(College of Chemistry and Life Sciences,Key Laboratory of Advanced Catalysis Materials of Ministry of Education, Zhejiang Normal University, Jinhua, Zhejiang 321004, China;Jinhua Professional Technical College, Jinhua, Zhejiang 321007, China)

机构地区:[1]浙江师范大学化学与生命科学学院先进催化材料教育部重点实验室,金华321004 [2]金华职业技术学院制药与材料工程学院,金华321007

出  处:《无机化学学报》2019年第5期787-792,共6页Chinese Journal of Inorganic Chemistry

基  金:国家自然科学基金(No.21173197)资助项目

摘  要:以3-羟基-5-(3,5-二甲酸-苯氧基)苯甲酸(H_3L)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(H_2O)]·3H_2O·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[Ln_2(COO)_6]次级结构单元,晶体由[Ln_2(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L^(3-)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,TbMOF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。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. CCDC: 1870637.

关 键 词:3-羟基-5-(3 5-二甲酸-苯氧基)苯甲酸  金属-有机框架材料 晶体结构 荧光性质 

分 类 号:O614.341[理学—无机化学]

 

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