Zn(Ⅱ),Cd(Ⅱ),Mn(Ⅱ)与3-吡啶-4-苯甲酸二元配位聚合物的合成与性质

Synthesis and Properties on Three Coordination Polymers of 4-(Pyridin-3-yl)benzoate with Zn(Ⅱ),Cd(Ⅱ) and Mn(Ⅱ)

通过溶剂热合成法将3-吡啶-4苯甲酸有机配体与过渡金属离子Zn(Ⅱ),Cd(Ⅱ)和Mn(Ⅱ)进行组装,获得了3个配位聚合物.单晶结构分析表明,在配合物1中,由四面体配位的Zn(Ⅱ)离子与μ-OH组成的一维"之"字链通过3-吡啶-4苯甲酸与相邻的其它4条"之"字链连接,形成了具有金刚石网拓扑的配位聚合物.配合物2和3为异质同晶,在配合物2和3中由八面体配位的Cd(Ⅱ)或Mn(Ⅱ)离子与μ-OH2组成的二核金属簇通过3-吡啶-4苯甲酸与相邻的其它4个二核金属簇连接,也形成了具有金刚石网拓扑的配位聚合物.对配体及配合物1和2的荧光性质进行了表征.配合物3的磁学性质测试表明,二核金属Mn(Ⅱ)簇之间存在着反铁磁交换作用,而且表现出自旋反转行为,可归属于短程相关而不存在长程有序.

Three coordination polymers were obtained through solvothermal synthesis based on 4-（pyridin-3-yl）benzoate with Zn（Ⅱ）,Cd（Ⅱ） and Mn（Ⅱ） ions,respectively.Complex 1 possesses 1D zigzag chain composed by tetrahedral Zn（Ⅱ） ions and μ-OH,which is further connected to four adjacent chains through 4-（pyridin-3-yl）benzoate,resulting in a dia net.While complexes 2 and 3 are isomorphous,in which binuclear clusters of octahedral Cd（Ⅱ）/Mn（Ⅱ） bridged by μ-OH2 are extended through the 4-（pyridin-3-yl）benzoate to four adjacent clusters into a dia net.The luminescence properties of complexes 1 and 2 were characterized.Magnetic measurements of complex 3 indicate there are antiferromagnetic exchange between the two high-spin Mn（Ⅱ） ions and spin-flop behavior.