文献类型：期刊文献

中文题名：光响应小分子/表面活性剂自组装体的宏观光响应行为

英文题名：Macroscopic Photo-Responsive Behaviors of Self-assemblies Constructed by Photo-Responsive Small Molecules and Surfactants

作者：帅洁[1];胡佳杰[1];涂燕[1];尚亚卓[1];刘洪来[1]

机构：[1]华东理工大学化学与分子工程学院,结构可控先进功能材料及其制备教育部重点实验室,上海200237

年份：2020

卷号：46

期号：5

起止页码：653

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金(21476072)。

语种：中文

中文关键词：表面活性剂;光响应;双水相体系;光致相分离;光致相混合

外文关键词：surfactants;photo-responsive;aqueous two-phase system;photo induced phase separation;photo induced phase combination

摘要：采用离子交换法,合成了一种无卤素的离子液体表面活性剂1-丁基-3甲基咪唑十二烷基硫酸酯([C4mim][C12SO4]),并将其与偶联表面活性剂Gemini12-3-12复配,同时引入光响应小分子反式-2-甲氧基肉桂酸(trans-OMCA),构建Gemini12-3-12/[C4mim][C12SO4]/trans-OMCA/H2O光响应体系,采用透射电镜、紫外-可见光谱和动态光散射等方法系统研究了复配体系中双水相体系及其相邻的单相囊泡体系和各向异性体系的紫外光响应行为。结果表明:复配体系具有良好的光响应性,对于球形胶束和蠕虫状胶束共存的双水相体系,一定时长的紫外光照射会促使其融合为单一的蠕虫状胶束相;单相囊泡体系在一定时长的紫外光照射后会分离为球形胶束和蠕虫状胶束共存的双水相体系,延长紫外光照射时间,体系又会逐渐融合为单一的蠕虫状胶束相;对于各向异性体系,一定时长的紫外光照射会使体系变为各向同性相。显然,通过紫外光照射可实现体系宏观相行为的变化,即光致相分离及光致相混合。
Halogen-free surface active ionic liquid(SAIL),1-butyl-3-methylimidazolium alkyl sulfate([C4mim][C12SO4]),was synthesized through ion exchange reaction.The photo responsive system of Gemini surfactant 12-3-12·2Br-(Gemini12-3-12)/[C4mim][C12SO4]/trans-OMCA/H2O was constructed by mixing[C4mim][C12SO4]with Gemini12-3-12,followed by an addition of photosensitive molecules,trans-o-methoxy cinnamate(trans-OMCA).The photo-responsive behaviors of aqueous two-phase system(ATPS),a specific single-phase system and the anisotropic phase system in the mixture of Gemini12-3-12/[C4mim][C12SO4]/trans-OMCA/H2O were studied by TEM,UV-vis and dynamic light scattering(DLS).The results show that the mixed system displays good photo responsiveness.For the aqueous two-phase system,in which spherical micelle and wormlike micelle coexist,UV irradiation for a certain period of time promotes the fusion of the spherical-micelle phase and wormlike-micelle phase into another single wormlike-micelle phase.For the single-phase vesicle system,it is separated into a two-phase system of spherical micelle and wormlike micelle after UV irradiation,and the system gradually merges into a single wormlike-micelle phase when the irradiation time is prolonged.The anisotropic system becomes isotropic after exposure to UV irradiation.It is suggested that the macro-phase behaviors of the system can be changed by UV irradiation and the system can undergo a photo-induced phase separation as well as combination.