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对不同链长的2-烷基-苯并咪唑衍生物(BzCn,烷基链长从C5到C15)在硝酸银亚相上的成膜行为及形成的LB膜的结构进行了研究.表面压-面积曲线的结果表明,短链(C5～C9)的2-烷基-苯并咪唑可在银离子亚相上形成稳定的单分子膜,而长链(C13和C15)衍生物则形成多层膜.利用LB技术可将上述Langmuir膜转移到固体基板上形成LB膜,其吸收光谱的结果说明了苯并咪唑和银离子配位.利用AFM、XRD及FT-IR等技术研究了烷基链长对LB膜结构的影响.实验结果表明,除了BzC15,其余的衍生物都可形成规整的层状结构.短链衍生物的单层LB膜具有均一、平整的形貌;而对于BzC15,观察到多层结构.
The formation behavior of LB films on 2-alkyl-benzimidazole derivatives with different chain lengths (BzCn, alkyl chain length from C5 to C15) on the silver nitrate subphase and the structure of the formed LB films were investigated. - The area curve results show that the short chain (C5 ~ C9) 2-alkyl-benzimidazole can form a stable monolayer on the silver ion subphase, while the long chain (C13 and C15) derivatives form more The LB film can be used to transfer the above Langmuir film to the solid substrate by LB technique.The result of absorption spectrum shows the coordination between benzimidazole and silver ions.The effects of alkyl groups Chain length on the LB film structure.The experimental results show that except BzC15, the remaining derivatives can form a regular layered structure.The short-chain derivatives monolayer LB film has a uniform, flat morphology; and for BzC15, A multilayer structure was observed.