【摘要】 通过水热技术制备了1种新的手性配位聚合物[Zn(Tar)(bipy).5H2O](聚合物1,Tar为L-酒石酸根,bipy为2,2′-联吡啶),其结构经X射线单晶衍射鉴定.在水热反应过程中,酒石酸衍生物缩酮保护基发生水解.该聚合物属正交晶系,P2(1)2(1)2(1)空间群,晶胞参数a=0.664 61(13)nm,b=1.431 3(3)nm,c=1.912 8(4)nm,α=β=γ=90°,V=1.819 6(6)nm3,Z=4,μ=1.414 mm-1,dcalc=1.678 g/cm3,F(000)=952,R1=0.045 7,ωR2=0.093 0.结构分析表明,酒石酸根桥连Zn()形成一维配位聚合物手性链;2条平行一维链上的吡啶环以面对面的方式相互嵌入(质心距离为0.358 nm)形成新颖的梯状双链结构,5个结晶水之间存在氢键作用,通过共用边5聚环形成一维水链,而水链上的2个O又与未配位的羧酸根O通过氢键作用相连接形成三维超分子结构.更多还原

【Abstract】 A novel chiral coordination polymer,[Zn(Tar)(bipy)·5H2O](polymer 1)(Tar=L-tartrate,bipy=2,2′-bipyridine),was synthesized via a hydrothermal reaction and characterized by single crystal X-ray diffraction.In the hydrothermal reaction,the protection group isopropylidene for tartaric acid was hydrolyzed.The analysis of crystal structure shows that the polymer 1 is orthorhombic with space group P2(1)2(1)2(1),a=0.664 61(13)nm,b=1.431 3(3)nm,c=1.912 8(4)nm,α=β=γ=90°,V=1.819 6(6) nm3,Z=4,μ=1.414 mm-1,dcalc=1.678 g/cm3,F(000)=952,R1=0.045 7,ωR2=0.093 0.Each tartrate chelates two Zn(Ⅱ) ions at opposite ends using one carboxylate oxygen and one hydroxyl oxygen and each Zn(Ⅱ) ion is chelated by two halves of tartrate dianions,therefore forming 1-D chiral coordination polymer chains.The 2,2′-bipyridine groups in two of parallel one-dimensional chains are interwoven,constituting ladder-shaped double chains.There are five crystallographically unique lattice H2O molecules in an asymmetric unit to form a cyclic pentamer with sharing-edges,therefore to form one-dimensional water chain.A three dimensional network is formed by the crystallization water chains joined by the carboxylate-oxygen atoms through hydrogen-bonding interactions.更多还原