以对苯二甲酸、三乙烯二胺构筑的二维层状结构的镉配位聚合物的晶体结构和荧光性质

摘要

溶剂热条件下采用Cd(NO3)2·4H2O、对苯二甲酸和三乙烯二胺作为反应物合成出一个具有二维骨架结构的配位聚合物(Cd(bdc)(dabco)(DMF)]·2H2O}n (1),并采用元素分析、红外光谱、差热分析和X-射线单晶衍射进行了研究及表征.晶休结构分析结果表明:对苯二甲酸离子(bdc)将Cd(Ⅱ)离子连接成一维链,相邻链之间进一步被三乙烯二胺(dabco)构筑成二维层状结构.沿c轴方向,垂直于二维层状结构中存在大小为0.74 nm×0.65 nm的一维通道.荧光谱图表明常温固态下配合物1发射蓝色荧光,荧光寿命为38.2 ns.%The self-assembly of terephthalic acid,triethylenediamine and Cd(NO3)2·4H2O under solvothermal condition gave one 2D cadmium coordination polymer,{Cd (bdc) (dabco) (DMF)] ·2H2O}n (1) (bdc =terephthalate,dabco=triethylenediamine),which has been characterized by elemental analysis,IR,TGA and single-crystal X-ray diffraction.The bdc ligands linked the Cd(Ⅱ) centers to form an infinite Cd-carboxylate chaiu.The chains are further bridged by dabco ligands,forming a two-dimensional layered network.Interestingly,2D layered network contains small channels of 0.74 nm×0.65 nm along the c axis.The photoluminescence and lifetime of 1 in the solid state have been studied.CCDC:847762.