基于双苯并咪唑和钼氧链的二维超分子的合成、结构及性能

Synthesis,structure and properties of a two dimensional supramolecular based on dibenzimidazole and Mo-O chain

通过水热方法合成了一种新的基于双苯并咪唑(bbbi=1,1'-(1,^(4-)丁基)二-1H-苯并咪唑)和钼氧链的二维超分子(H_2bbbi)_2[Mo_8O_(26)],并通过红外光谱、粉末X-射线衍射以及单晶X-射线衍射对超分子的结构进行了表征.该超分子是由质子化的H_2bbbi^(2+)以及共角链接的基于[Mo_8O_(26)]^(4-)的无机钼氧链组成,最终通过[Mo_8O_(26)]^(4-)的端氧和质子化的H_2bbbi^(2+)咪唑之间的氢键作用拓展成波浪形二维结构.标题超分子具有较好的相纯度和荧光特性,并且在紫外光照射下对亚甲基蓝染料分子具有一定的光催化降解能力.

A two dimensional supramolecular based on dibenzimidazole （ bbbi = 1,1＇ - （ 1,4 - butanediyl） bis - 1 H - benzimidazole） and Mo - O chain has been synthesized with the hydrothemlal method. The structure of （H2bbbi）2 [ Mo8O26 ] was characterized by the IR spectra, powder and single custal X- ray diffraction. The structural unit of the title supramolecular contains two protonated H2bbbi2＋ and inorganic Mo -O chains derived from co - cornered [ Mo8O26 ] 4-. Finally, a two dimensional wave - like supramolecular network was obtained and extended by the hydrogen -bonding interactions between the terminal O atoms of [Mo8O26 ] 4- and the imid- azole groups of H2bbbi2＋. Additionally, the supramolecular shows good phase purity, fluorescence property and photocatalytic activities towards the degradation of organic dye methylene blue under UV irradiation.