Molecular Packing Parameter in Bolaamphiphile Solutions: Adjustment of Aggregate Morphology by Modifying the Solution Conditions
Yun Yan(Peking University), Wei Xiong(Peking University), Xiaosong Li(State Key Laboratory for Structural Chemistry of Unstable and Stable Species), Ting Lu(State Key Laboratory for Structural Chemistry of Unstable and Stable Species), Jianbin Huang(State Key Laboratory for Structural Chemistry of Unstable and Stable Species), Zichen Li(Peking University), Honglan Fu(Peking University)
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Abstract
The geometrical rule of molecular packing parameters in a bolaamphiphile solution was tested with experimental results. By modifying the solution conditions to change the molecular packing parameters, the morphology of the aggregate was successfully manipulated in a single-chain bolaamphiphile, disodium phenyl-1,4-bis (oxyhexanoate) (i.e., C6PhC6Na2 solution). Micelle-vesicle-tube transformation was observed by changing the pH and the addition of NaBr or octanol. In the mixed systems of oppositely charged bola/surfactants, the molecular packing parameter's role is related to the mixing ratio.
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