1种Cd(Ⅱ)配聚物的合成、晶体结构及光物理性能研究  

Synthesis , crystal structure and photophysical properties of Cd(Ⅱ) coordination polymer

作　　者：迟玉贤[1] 章莹莹[1] 孟秦[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2012年第4期524-528,共5页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(20571037);辽宁省教育厅创新团队项目(2007T092)

摘　　要：采用水热合成法,以Cd(Ⅱ)离子为配位中心,均四苯甲酸为配体,合成了1种具有2D无限结构的Cd(Ⅱ)配位聚合物[Cd(btec)0.5(H2O)3]n(H4btec=均四苯甲酸),并得到了它的单晶体.通过X-射线单晶衍射,确定了该配聚物的晶体结构.单晶结构分析表明,该配聚物属于三斜晶系,P-1空间群.在晶体中,中心金属Cd(Ⅱ)离子为6配位,被桥联配体均四苯甲酸根以2种配位模式连接起来,使其在ac面上形成2D层状结构,而层与层之间则是通过O-H…O型氢键被进一步连成3D氢键网络结构.在室温下,测定了配聚物固态粉末的IR(红外),UV-Vis(紫外-可见),荧光激发和发射光谱,并对各光谱进行了分析指认.以λEx=330nm的光激发,该配聚物在375～500nm处可发射较强的蓝色光,光物理研究表明,该发射带是源于配体的LLCT(Ligand-to-Ligand chargeTransfer,配体到配体的电荷转移)发光.One Cd（Ⅱ） coordination polymer using Cd（Ⅱ） ion as the central metal ion and H 4 btec（benzene-1,2,4,5-tetracarboylic acid） as the ligand,[ Cd（btec） 0.5（H2O）3] n was synthesized by the hydrothermal method and its structure was determined by single-crystal X-ray diffraction.The polymer crystallizes in triclinic system with P-1space group and possesses the 2Dinfinite structure.In the crystal,the Cd（Ⅱ） ion is six-coordinated and these Cd（Ⅱ） ions are bridged by btec 4ligands adopting two kinds of coordination mode,forming the 2Dlayers in ac plane.Moreover,the 2Dlayers are further connected into 3D hydrogen bonding network structure by O-H … O hydrogen bonds.At room temperature in the solid state,the IR,UV-Vis,excitation and emission spectra of the polymer were measured and analyzed.With’Ex =330nm,the polymer can emit intense blue light in 375～500nm range which should be assigned to the LLCT luminescence of the ligand.

关 键 词：Cd(Ⅱ)的配聚物 晶体结构 发光 

分 类 号：O614.3[理学—无机化学]