文献类型：期刊文献

英文题名：Spontaneous crystallization at the air-water interface: An unusual feature of gemini surfactant with a rigid Spacer

作者：Zhou, Min[1,3]; Liu, Hong Lai[1]; Yang, Hai Feng[3]; Liu, Xue Liang[2]; Zhang, Zhong Rang[3]; Hu, Ying[1]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Lab Adv Mat, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Gemstone Testing Ctr, Shanghai 200237, Peoples R China;[4]Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China

年份：2006

卷号：22

期号：26

起止页码：10877

外文期刊名：LANGMUIR

收录：;EI(收录号：20070410390181);WOS:【SCI-EXPANDED(收录号:WOS:000242771200005)】；

语种：英文

外文关键词：Crystallization - Interfaces (materials) - Polarization - Solutions - X ray diffraction analysis

摘要：An unusual feature which involves spontaneous crystallization at the air-water interface from aqueous solution was reported for a water-soluble gemini surfactant with xy1y1 spacer, (p-phenylenedimethylene) bis(dodecyldimethylammonium) dibromide. Polarizing microscope, in situ confocal microscopic Raman spectroscopy, and powder XRD were used to characterize the structure of the crystal and investigate the driving force for nucleation. It was inferred that, besides the surface enrichment of amphiphiles and the intra- and intermolecular interaction of alkyl chains, the pi-pi stacking interaction of benzene rings plays an extraordinary role in promoting nucleation and stabilizing crystal structure. A mechanism for constructing supramolecular architectures in situ at the air-water interface directly from aqueous solution via water-soluble amphiphiles with groups favorable for d-d stacking interaction was proposed.