三维网状配位聚合物[Zn(HBIDC)·H_2O]_n的合成、晶体结构及光谱性质研究

Synthesis,Crystal Structure and Spectral Properties Study of a 3D Netlike Coordination Polymer [Zn(HBIDC)·H_2O]_n

以苯并咪唑-5,6-二羧酸(H3BIDC)为配体,通过水热条件下的自组装技术制备出一个三维网状结构的锌配位聚合物[Zn(HBIDC).H2O]n(1)。用X射线单晶衍射、元素分析和IR表征了1的结构,用紫外-可见吸收光谱、荧光光谱和荧光衰减曲线研究了1在DMSO溶液中和固态时的光学性能。1在室温DMSO溶液中,最大发射峰是在481nm,呈现蓝色荧光;而在固体状态下,在493nm处有一强蓝光发射峰,这均是基于苯并咪唑-5,6-二羧酸中心的单重激发态到单重基态(π*→π)的跃迁发射。实验表明1具有较高的荧光量子产率并可作为潜在的蓝色发光材料。

The 3D netlike coordination polymer of Zn Ⅱ with benzimidazole-5,6-dicarboxylic acid （H3BIDC）, [Zn（HBIDC）·H2O]n was synthesized by the hydrothermal method through self-assembling. The crystal structure of complex 1 was character-ized by single-crystal X-ray diffraction, elemental analysis and IR spectra, and we also studied the fluorescence properties of complex 1 in DMSO and in the solid state with UV-Vis absorption spectra, fluorescence spectra and fluorescence lifetime. Com-plex 1 has blue luminescence in solutions of DMSO with emission band at 481 nm; and has blue luminescence in the solid state at room temperature with a strong emission band at 493 nm, and these all can be attributed to the π^＊→π transition based on the benzimidazole-5,6-dicarboxy acid. The experimental results indicate that complex 1 displays higher fluorescence quantum effi-ciency and can be used as a potential blue luminescence material.