一维镉(Ⅱ)配合物[Cd(H2ASA)2(H2O)2]n的合成、晶体结构及光致变色性质  

Synthesis,Crystal Structure and Photochromic Property of aOne-Dimensional Cd(Ⅱ)Complex[Cd(H2ASA)2(H2O)2]n

作　　者：邱燕璇 朱铭芙 麦映璇 董鉴辉 潘昊 QIU Yanxuan;ZHU Mingfu;MAI Yingxuan;DONG Jianhui;PAN Hao(Department of Chemistry,Guangdong University of Education,Guangzhou 510303,China;College of Science,Shantou University,Shantou 515063,China)

机构地区：[1]广东第二师范学院化学系,广州510303 [2]汕头大学理学院,汕头515063

出　　处：《人工晶体学报》2020年第7期1258-1263,共6页Journal of Synthetic Crystals

基　　金：广东省普通高校青年创新人才项目(2019KQNCX100);广东省攀登计划项目(pdjh2020a0425)。

摘　　要：以5-偶氮四唑水杨酸(H3ASA)和CdCl2·2.5H2O为原料,通过常规溶液法合成了一个镉配合物[Cd(H2ASA)2(H2O)2]n(1)。通过X-射线单晶衍射、X-射线粉末衍射、元素分析、红外光谱、热重分析、紫外光谱进行结构解析和性质表征。结果表明配合物1属于三斜晶系,Pī空间群,晶胞参数为a=0.702 39(5) nm,b=0.735 15(6) nm,c=1.229 41(7)nm,α=82.557(5)°,β=75.453(6)°,γ=61.882(8)°,V=0.541 90(8) nm^3,Z=1,μ=1.083 mm^-1,Dc=1.884 g/cm^3。配合物1中具有H2ASA^-,作为μ2-桥联配体连接两个不同的Cd(Ⅱ)离子形成无限一维链结构,相邻直链通过O…O、O…N氢键和π-π堆积作用形成三维超分子框架。紫外光谱测试表明配合物1在365 nm紫外光照射下具有光致异构性质。A Cd(Ⅱ) complex of [Cd(H2ASA)2(H2O)2]n(1) was synthesized by solution method using 5-azotetrazolyl salicylic acid(H3ASA) and CdCl2·2.5 H2O as raw materials. Structural analysis and characterization were carried out by single crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, infrared spectroscopy, thermogravimetric analysis and UV-Vis spectroscopy. The result reveals that complex 1 crystallizes in the triclinic space group Pī with a=0.702 39(5) nm, b=0.735 15(6) nm, c=1.229 41(7) nm, α=82.557(5)°, β=75.453(6)°, γ=61.882(8)°, V=0.541 90(8) nm^3, Z=1, μ=1.083 mm^-1, Dc=1.884 g/cm^3. Complex 1 features an infinite 1 D chain structure formed by the μ2 bridge ligand H2ASA^- linking two different Cd(Ⅱ) ions. The neighboring chains are further self-assembled through O…O, O…N hydrogen bonds and π-π stacking interactions to form a 3 D supramolecular network. UV-Vis spectroscopy measurement indicates that complex 1 exhibits photochromic property under 365 nm UV light irradiation.

关 键 词：镉配合物 偶氮化合物 溶液法 晶体结构 光致变色 

分 类 号：O614[理学—无机化学]