Supramolecular 鈥淟eeks鈥?of a Fluorinated Hybrid Amphiphile That Self-Assembles into a Disordered Columnar Phase

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• 作者：Mohan N. Wadekar ; Ludmila Abezgaus ; Kristina Djanashvili ; Wolter F. Jager ; Eduardo Mendes ; Stephen J. Picken ; Danino Dganit
• 刊名：The Journal of Physical Chemistry B
• 出版年：2013
• 出版时间：March 7, 2013
• 年：2013
• 卷：117
• 期：9
• 页码：2820-2826
• 全文大小：416K
• 年卷期：v.117,no.9(March 7, 2013)
• ISSN：1520-5207

文摘

We report on the formation of unprecedented 鈥渓eek鈥?shaped aggregates of an anionic fluoroalkyl sulfonate surfactant (FS) and the supramolecular assembly of these aggregates into a disordered columnar phase (C_S). The leeks are formed by wrapping of 2鈥? FS鈥搘ater bilayers of thickness 26鈥?8 脜 into 10鈥?0 nm thick and >100 nm long structures, in the concentration regime of 63鈥?0 wt % FS. A lamellar (L_伪) lyotropic liquid-crystalline (LLC) phase forms at higher concentration, between 70 and 84 wt %. In the two LLC phases, the FS molecules were organized in an interdigitated or tilted fashion, or a combination of the two. Such a unique supramolecular self-assembly of amphiphiles has not been predicted nor observed before. This self-assembly behavior could be of interest to various fields like microencapsulation, nanomedicine, and membrane protein crystallization.