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机构地区:[1]吉林大学化学学院,长春130012 [2]长春师范大学化学学院,长春130032
出 处:《无机化学学报》2016年第7期1190-1198,共9页Chinese Journal of Inorganic Chemistry
基 金:吉林省教育厅十二五规划项目(吉教科合字[2013]第248号)资助
摘 要:以3,5-双(4-羧基-苯氧基)苯甲酸(H_3BCPBA)、1,3-双(咪唑基)丙烷(bip)与硝酸镉为反应物,在水热、溶剂热条件下以不同的反应温度和不同的降温速率,分別合成出了2种金属-有机骨架(MOF)化合物:{[Cd_(1.5)(BCPBA)(bip)]·H_2O·DMF}_n(1)和[Cd_(1.5)[BCPBA)(bip)_(0.5)(H_2O)]_n(2)。通过X射线单晶衍射(XRD)确定其结构,并用红外光谱(IR)、元素分析、热重(TG)和粉末X射线衍射仪(PXRD)等对其进行表征,并测试了2种化合物的荧光属性。结构表明化合物1中Cd1原子先与3个BCPBA^(3-)配体配位,形成一个一维链结构,2个相邻的一维链通过Cd2原子由羧基氧桥接在一起。然后由含氮配体将一维的双链连结成一个二维的层结构。化合物2是一个由新颖的篮子型六连结的三核Cd(Ⅱ)二级结构单元(SBUs)构筑的二维层结构。Two metal-organic frameworks(MOFs), namely, {[Cd1.5(BCPBA)(bip)]·H2O·DMF}n(1) and [Cd1.5(BCPBA) (bip)0.5(H2O)]n(2) (H3BCPBA=3,5-bis(4-carboxy-phenoxy)benzoic acid, bip=1,3-bis(imidazolyl)propane), have been synthesized under hydrothermal/solvothermal conditions with different reaction temperatures and decreasing temperature rates. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by infrared spectra(IR), elemental analyses, and thermogravimetric analyses(TGA). In compound 1, the Cdl cation is coordinated by three BCPBA3- ligands to form a 1D chain, then two adjacent 1D chain are bridged together by carboxylic oxygen and Cd2 atom. Then the hip ligands join all infinite 1D doublechains into a 2D sheets. In compound 2, trinuclear Cd(Ⅱ) secondardedy building units (SBUs) can be regarded as 6-connected nodes with the BCPBA3- ligands acting as linkers to form a 2D layered network. Photoluminescence properties of 1 and 2 in solid state at room temperature were studied. CCDC: 1052091, 1; 1052166, 2.
关 键 词:3 5-双(4-羧基-苯氧基)苯甲酸 1 3-双(咪唑基)丙烷 金属有机骨架材料 荧光
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