配合物[M(C_(14)H_(10)N_4)_2·HPO_4]·0.25H_2O(M=Cd,Mn)的水热合成、晶体结构及荧光性质

Hydrothermal Syntheses, Crystal Structures and Photoluminescence Property of Complexes [M(C_(14)H_(10)N_4)_2·HPO_4]·0.25H_2O(M=Cd,Mn)

通过水热反应,合成了2种新的2,2′-联苯并咪唑超分子配合物[M(C14H10N4)2·HPO4]·0.25H2O(配合物1:M=Cd,配合物2:M=Mn)。经元素分析、红外光谱、热重对其结构进行了表征,用X-射线单晶衍射测定了该化合物的晶体结构。两晶体均为三斜晶系,P1空间群,均由1个M髤离子、2个2,2′-联苯并咪唑分子、1个磷酸氢根阴离子及0.25个结晶水组成。其中2,2′-联苯并咪唑分子中的碱性氮原子和磷酸氢根阴离子中的氧原子与M髤离子配位,形成6配位的畸变八面体构型。分子之间通过氢键N-H…O和π-π堆积作用相互构成二维层状超分子结构。室温固态荧光测试显示,配合物1在491.0nm(λmax)具有强的荧光发射。

Two new supermolecular complexes, [M（2,2′-dibenzimidazole）2·HPO4]·0.25H2O （complex 1： M=Cd, complex 2： M=Mn） were synthesized by the hydrothermal reaction of o-diaminobenzene, oxalic acid with CdSO4 or MnSO4 in 10% H3PO4 solution, and were characterized by elemental analysis, IR spectral analysis and thermogravimetric analysis. Their crystal structures were determined by the X-ray single crystal diffraction, which show that both of them belong to triclinic system and space group P1 with similar crystal parameters. Each of them consists of a M（Ⅱ） ion, two 2,2′-dibenzimidazole units, a hydrogen phosphate ion and 0.25 crystal water molecule in the single cell. The coordinated geometry of the centre metal atom with four nitrogen atoms and two oxygen atoms is the distorted octahedral configuration. Two 2D layer supermolecular complex systems are formed by the hydrogen bonds N -H … O and π-π stacking interactions between neighboring single cells. Complex 1 shows a strong fluorescent emission （λmax=491.0 nm） at solid state.