Metal Ions Induced Vesicle Formation of Single-Chained Hydrocarbon Surfactants with Coordinated Headgroups  

作　　者：GUO Hong-tao XU Fei GAO Nan ZHOU Xiao-hai DONG Jin-feng HONG Xin-lin ZHANG Gao-yong 

机构地区：[1]College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China

出　　处：《Wuhan University Journal of Natural Sciences》2005年第6期1035-1040,共6页武汉大学学报（自然科学英文版）

基　　金：Supported by the Foundation of Wuhan University(203-276025)

摘　　要：The surfactant of N-dodecyliminodipropionate disodium salt has been synthesized, and structure has been well characterized. The properties in aqueous solution have been studied by potentiometric titration, surface tension, transmission electron microscopy （TEM） and uhra-violet （UV） spectra. It was found that N-dodecyliminodipropionate disodium could exist in four species （e. g. cation, zwitterion, monoanion, dianion） in aqueous solution depending on pH,and relative distribution of these ionic species as a function of pH was obtained. The critical micelle concentration （CMC）, determined from the breakpoint of surface tension at different concentrations, is 4. 16 × 10^1 mol/L, and the surface tension at CMC is 30 mN/m. It was found that the self-aggregate structures in aqueous solution transformed from micelles to vesicles after the Cu （Ⅱ） added. The experimental results showed that coordination between the iminodipropionate group and Cu（Ⅱ） resulted to vesicles formation.The surfactant of N-dodecyliminodipropionate disodium salt has been synthesized, and structure has been well characterized. The properties in aqueous solution have been studied by potentiometric titration, surface tension, transmission electron microscopy （TEM） and uhra-violet （UV） spectra. It was found that N-dodecyliminodipropionate disodium could exist in four species （e. g. cation, zwitterion, monoanion, dianion） in aqueous solution depending on pH,and relative distribution of these ionic species as a function of pH was obtained. The critical micelle concentration （CMC）, determined from the breakpoint of surface tension at different concentrations, is 4. 16 × 10^1 mol/L, and the surface tension at CMC is 30 mN/m. It was found that the self-aggregate structures in aqueous solution transformed from micelles to vesicles after the Cu （Ⅱ） added. The experimental results showed that coordination between the iminodipropionate group and Cu（Ⅱ） resulted to vesicles formation.

关 键 词：SURFACTANT MICELLE VESICLE metal ion iminodipropionate 

分 类 号：O647.2[理学—物理化学]