摘要
采用水热方法,用2种联苯类三羧酸配体:联苯-2,4,4′-三羧酸(H3btc)、5-(3,4-二羧基苯基)吡啶甲酸(H3dppa)和4,4′-联吡啶(4,4′-bipy)分别与CoCl2·6H2O和NiCl2·6H2O反应,合成了具有一维双螺旋链结构的配合物[Co(μ2-H2btc)2(4,4′-bipy)2]n(1)以及二维层状配位聚合物{[Ni3(μ4-dppa)2(H2O)6]·2H2O}n(2),并对其结构和磁性质进行了研究。结构分析结果表明2个配合物都属于三斜晶系,P1空间群。配合物1具有一维双螺旋链结构,而且这些链通过O-H…O/N氢键作用进一步形成了三维超分子框架。而配合物2具有基于一维链单元的二维层状结构。4,4′-联吡啶在配合物1和2中分别起配位作用和模板作用。研究表明,配合物1中相邻钴离子间存在铁磁相互作用。
Two 1D cobalt(Ⅱ) and 2D nickel(Ⅱ) coordination polymers, namely [Co(μ2-H2btc)2(4,4′-bipy)2]n(1) and{[Ni3(μ4-dppa)2(H2O)6]·2H2O}n(2), have been constructed hydrothermally using H3btc(H3btc =biphenyl-2,4,4′-tricarboxylic acid), H3dppa(H3dppa =5-(3,4-dicarboxylphenyl)picolinic acid), 4,4′-bipy(4,4′-bipy=4,4′-bipyridine),and cobalt or nickel chlorides. Single-crystal X-ray diffraction analyses reveal that both compounds crystallize in the triclinic system, space group P1. Compound 1 has a 1D double-helix chain structure, which is assembled to a3D supramolecular framework through O-H … O/N hydrogen bond. Compound 2 shows a 2D sheet based on 1D chain units. Moreover, 4,4′-bipy can tune the structures of both coordination polymers by its coordination or template effect. Magnetic studies for compound 1 demonstrate a ferromagnetic coupling between the adjacent Co(Ⅱ) centers.
作者
赵娜
黎彧
冯安生
邹训重
ZHAO Na;LI Yu;FENG An-Sheng;ZOU Xun-Zhong(Guangdong Research Center for Special Building Materials and Its Green Preparation Technology/Foshan Research Center for Special Functional Building Materials and Its Green Preparation Technology, Guangdong Industry Polytechnic, Guangzhou 510300, China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2019年第7期1248-1254,共7页
Chinese Journal of Inorganic Chemistry
基金
广东省高等职业院校珠江学者岗位计划资助项目(2015,2018)
广东省自然科学基金(No.2016A030313761)
广东轻院珠江学者人才类项目(No.RC2015-001)
生物无机与合成化学教育部重点实验室开放基金(2016)
广东省高校创新团队项目(No.2017GKCXTD001)
广州市科技计划项目(No.201904010381)
广东省高校特色创新项目(No.2017GKTSCX005)资助
关键词
配位聚合物
双螺旋链
模板效应
三羧酸配体
磁性
coordination polymer
double-helix chain
template effect
tricarboxylic acid
magnetic properties
