基于5-氯烟酸的锌(Ⅱ)和镉(Ⅱ)配合物的合成、晶体结构及荧光性质(英文)

Znic and Cadmium Coordination Compounds Constructed from 5-Halonicotinic Acid:Synthesis, Crystal Structures, and Luminescent Properties

通过水热方法,以5-氯烟酸(5-ClnicH)和2,2′-联咪唑(2,2′-biimidazole)分别与Zn(NO3)2·6H2O和Cd(NO3)2·4H2O反应,合成了2个配合物[Zn(5-Clnic)2]n(1)和[Cd(5-Clnic)2(H2biim)2](2),并对其结构和荧光性质进行了研究。结构分析结果表明配合物1和2分别属于单斜晶系,C2c空间群和三斜晶系,P1空间群。配合物1具有二维层状结构,而且这些层通过Cl…Cl卤键作用进一步形成了三维超分子框架。2为单核镉配合物,通过分子间N-H…O、C-H…N和C-H…Cl氢键作用,单核的分子被进一步连接成了三维超分子结构。配合物1和2在室温下能分别发出很强的紫色和绿色荧光。

Two coordination compounds, namely [Zn（5-Clnic）2]n（1） and [Cd（5-Clnic）2（H2biim）2]（2,5-Clnic H =5-halonicotinic acid, H2 biim =2,2′-biimidazole）, were assembled. Single-crystal X-ray diffraction analyses revealed that the two complexes crystallize in the monoclinic system, space group C2 c and triclinic system, space group P1, respectively. Compound 1 possesses a 2D sheet coordination network, which is further extended into a 3D supramolecular architecture via Cl …Cl halogen bonding. Compound 2 consists of a mononuclear molecule, which is assembled to a 3D supramolecular framework through N-H … O, C-H … N and C-H … Cl hydrogen bond.Luminescent of both compounds have also been studied. CCDC： 998912, 1; 998913, 2.