X-Ray Analyses of Complexes Formed between Surfactants and Aromatic Compounds. I. A Common Structural Pattern of the Complexes
X-Ray Analyses of Complexes Formed between Surfactants and Aromatic Compounds. I. A Common Structural Pattern of the Complexes
复制标题
表面活性剂和芳香族化合物之间形成的复合物的 X 射线分析。
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
H. Hirata
中科院分区：
文献类型：
--
作者：
Keiju Sawada;T. Kitamura;Y. Ohashi;N. Iimura;H. Hirata
阳离子表面活性剂如十六烷基、十四烷基、十二烷基和癸基三甲基溴化铵在水溶液中与各种芳香族化合物形成配合物。如果芳香族化合物含有给氢基团，则可得到定义良好的晶体。用x射线分析了10种复合晶体的结构。所有的晶体结构都有一个共同的复杂形成模式，其中芳香族化合物被表面活性剂分子的两条烷基链夹在中间。当具有共同图案的配合物堆积形成晶格时，有两种堆叠模式。络合物形成的共同模式是导致含有阳离子表面活性剂和芳香族化合物的水溶液具有高粘弹性的原因。
The cationic surfactants such as hexadecyl-, tetradecyl-, dodecyl-, and decyltrimethylammonium bromides form complexes with a variety of aromatic compounds in aqueous solutions. Well-defined crystals were obtained if the aromatic compounds had hydrogen donor moieties. The structures of ten kinds of the complex crystals were analyzed by X-rays. All the crystal structures had a common pattern of complex formation, in which the aromatic compounds are sandwiched by the two alkyl chains of the surfactant molecules. There are two modes of stacking when the complexes with the common pattern are piled up to form the crystalline lattice. The common pattern of complex formation is responsible for the high viscoelasticity of the aqueous solutions containing cationic surfactants and aromatic compounds.