摘要
采用水热合成法合成了2种金属有机配合物{[Zn(tdc)(m-bix)]H2O}n(1)和{[Co5(btx)2(NDC)4(μ3-OH)2(H2O)2]}n(2)(H2tdc=2,5-噻吩二羧酸,m-bix=1,3-二咪唑基亚甲基苯),btx=对二(三氮唑甲基苯),H2NDC=1,4-萘二甲酸,通过X射线单晶衍射、元素分析、X射线粉末衍射和红外光谱对配合物的结构进行表征.结果表明配合物1是四连接的二维层状结构,拓扑符号为{4^4·6^2},借助于氢键作用力,该配合物拓展成三维超分子网状结构;而配合物2则以五核[Co5(μ3-OH)2(COO)8]作为次级结构单元,呈现出拓扑符号为{3^6·4^34·5^3·6^2}的罕见的十连接三维结构.此外,光致发光研究表明,配合物1在565 nm和605 nm处有发射峰,可作为一种潜在的荧光材料.磁学研究则表明配合物2存在弱的反铁磁相互作用,线性拟合得到该配合物的居里外斯温度Tθ=-3.3 K.
Two novel metal-organic complexes{[Zn(tdc)(m-bix)]H2O}n(1)and{[Co5(btx)2(NDC)4(μ3-OH)2(H2O)2]}n(2)(H2tdc=2,5-thiophenedicarboxylic acid,m-bix=1,3-bis(imidazol-1-ylmethyl)-benzene,btx=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene,H2NDC=1,4-naphthalenedicarboxylic acid)have been hydrothermally synthesized.The structure was characterized by techniques of single-crystal X-ray diffraction analysis,elemental analysis,powder X-ray diffraction,infrared spectra,revealing that complex 1 exhibited 4-connected 2D layer structure with the point symbol of{4^4·6^2},which extended into 3D supramolecular network by means of hydrogen bonds.While complex 2 featured a rare 3D 10-connected framework with the symbol of{3^6·4^34·5^3·6^2}based on the pentanuclear[Co5(μ3-OH)2(COO)8]secondary building unit.In addition,photoluminescence investigations revealed that complex 1 has emission peaks at 565 nm and 605 nm,which can be used as a potential fluorescent material.Furthermore,magnetic analyses indicated that complex 2 showed weakly antiferromagnetic coupling between the Co(Ⅱ)ions and the magnetic susceptibility datas were rationally fitted with Tθ=-3.3 K.
作者
张青青
刘宇奇
刘强
王新颖
李玮
薛晓斐
ZHANG Qing-qing;LIU Yu-qi;LIU Qiang;WANG Xin-ying;LI Wei;XUE Xiao-fei(Faculty of Science,Kunming University of Science and Technology,Kunming 650500,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第4期733-742,共10页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金联合基金(U1502273)
昆明理工大学引进人才科研启动基金(KKSY201507026)
昆明理工大学分析测试基金(2017M20152111048,2019M20182111050).
关键词
金属有机配合物
水热合成
晶体结构
荧光性能
反铁磁性
Zn
CO
metal-organic complex
hydrothermal synthesis
crystal structure
fluorescence property
antiferromagnetis
Zn
Co
