Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA.
Chemistry. 2010 Oct 4;16(37):11320-4. doi: 10.1002/chem.201000794.
The formation of reverse-vesicular structures of the polyoxometalate-containing hybrid surfactants nBu(4)N[MnMo(6)O(18){(OCH(2))(3)-CNHCO(CH(2))(n-2)CH(3)}(2)] (Mn-Anderson-C(n), n=6, 16) in nonpolar medium was achieved by titrating toluene into Mn-Anderson-C(n)/acetonitrile (MeCN) solution. Stepwise change of the solvent polarity induces self-association of the hydrophilic Mn-Anderson cluster on the hybrid amphiphiles. The reverse-vesicle formation was characterized by laser light scattering and further confirmed by transmission electron microscopy techniques, and the vesicle sizes increase with increasing toluene contents. The assembly process was accelerated at an elevated temperature. The length of the alkyl tails on the hybrid surfactants has a minor effect on the vesicle sizes, because the strong attraction between the polyoxometalate clusters is more dominant in the reverse-vesicle formation.
在非极性介质中，通过将甲苯滴定到[MnMo6O18(OCH2)3CNHCO(CH2)nCH3]2-（Mn-Anderson-C(n)，n=6，16）/乙腈（MeCN）溶液中，形成了含有多金属氧酸盐的混合表面活性剂的反向囊泡结构。溶剂极性的逐步变化诱导亲水性 Mn-Anderson 簇在混合两亲物上自组装。反向囊泡的形成通过激光光散射进行了表征，并通过透射电子显微镜技术进一步证实，囊泡的尺寸随甲苯含量的增加而增加。在升高的温度下，组装过程得到加速。混合表面活性剂上的烷基链长度对囊泡尺寸的影响较小，因为在反向囊泡形成中，多金属氧酸盐簇之间的强吸引力更为重要。
