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N,N-二甲基二茂铁基甲胺分别与溴代辛烷、溴代十二烷、溴代十四烷和溴代十六烷反应,合成了4种二茂铁表面活性剂:N,N-二甲基二茂铁甲基辛烷基溴化铵(Fc8)、N,N-二甲基二茂铁甲基十二烷基溴化铵(Fc12)、N,N-二甲基二茂铁甲基十四烷基溴化铵(Fc14)和N,N-二甲基二茂铁甲基十六烷基溴化铵(Fc16)1。HNMR与元素分析结果表明,Fc8、Fc12、Fc14和Fc16的分子结构与理论结构吻合,质量分数96%;分别测定了4种化合物在还原态(I+)和氧化态(I2+)的表面张力,结果表明,该化合物在还原态具有良好的表面活性,其临界胶束浓度分别为5.92、0.67、0.46和0.07 mmol/L,仅为相应的直链季铵盐阳离子表面活性剂CMC值的1/40、1/25、1/5和1/15;而在氧化态时表面活性不明显。通过该化合物在氧化态和还原态的表面张力曲线的对比,表明该化合物具有良好的可逆变化能力。因而,可以调节化合物所处的氧化态或还原态,控制其表面活性。
N, N-dimethyl ferrocenyl methylamine were reacted with bromooctane, bromodecane, bromohexadecane and bromohexadecane respectively to synthesize four kinds of ferrocene surfactants: N, N-dimethylferrocenylmethyloctylammonium bromide (Fc8), N, N-dimethylferrocenylmethyldodecylammonium bromide (Fc12), N, Methylferrocenylmethyltetradecyl ammonium bromide (Fc14) and N, N-dimethylferrocenyl methylhexadecylammonium bromide (Fc16) 1. The results of HNMR and elemental analysis showed that the molecular structures of Fc8, Fc12, Fc14 and Fc16 were consistent with the theoretical structure, and the mass fraction was 96%. The surface tensions of the four compounds in the reduced state (I +) and the oxidized state (I2 +) were measured. The results show that the compound has good surface activity in the reduced state and the critical micelle concentration is 5.92, 0.67, 0.46 and 0.07 mmol / L, respectively, which is only 1/40 of the CMC value of the corresponding linear quaternary ammonium cationic surfactant 1 / 25,1 / 5 and 1/15; while in the oxidation state the surface activity is not obvious. The comparison between the surface tension curves of the compound in the oxidized and the reduced state shows that the compound has good reversible change ability. Thus, the compound can be placed in the oxidation state or reduced state, to control its surface activity.