A metal-sensitive organic-inorganic hybrid surfactant: POSS-capped dipicolinic acid-functionalized poly(ethylene glycol) amphiphile
A metal-sensitive organic-inorganic hybrid surfactant: POSS-capped dipicolinic acid-functionalized poly(ethylene glycol) amphiphile
复制标题
金属敏感的有机-无机杂化表面活性剂：POSS封端吡啶二羧酸功能化聚乙二醇两亲物
DOI：
10.1016/j.reactfunctpolym.2013.05.005
复制
发表时间：
2013-08-01
影响因子：
5.1
通讯作者：
Dai Lizong
中科院分区：
文献类型：
--
作者：
Chen Lingnan;Zeng Birong;Dai Lizong
通过酰胺化和酯化反应合成了一种新型的金属响应性有机-无机杂化两亲物，该两亲物具有明确的笼状结构，头部为疏水性多面体低聚倍半硅氧烷（PUSS），尾部为亲水性聚乙二醇，末端为双齿配体。采用NMR表征了新型两亲性表面活性剂氨丙基异辛基-POSS-马来酸-聚乙二醇-吡啶二甲酸（POSS-MA-PEG-DPA）的结构，并采用透射电镜、动态光散射和紫外可见分光光度法研究了其自组装行为.实验结果表明，胶束形态可以通过锌离子的加入来控制。所提出的调制机制涉及疏水性，金属配位和排斥相互作用的组合。此外，配位键提供胶束具有良好的动态和热稳定性。我们还发现，蝌蚪形的两亲物可以形成反胶束的平均直径约为30 nm。(c)2013爱思唯尔有限公司保留所有权利。
A novel metal responsive organic-inorganic hybrid amphiphile with a well-defined cage structure bearing a hydrophobic polyhedral oligomeric silsesquioxane (PUSS) head and a hydrophilic poly(ethylene glycol) tail functionalized with a bidendate ligand was synthesized via amidation and esterification reactions. The structure of the novel amphiphilic surfactant, aminopropylisooctyl-POSS-maleic acid-poly-(ethylene glycol)-dipicolinic acid (POSS-MA-PEG-DPA), was characterized by NMR, and its self-assembly behavior was investigated by transmission electron microscopy, dynamic light scattering, and UV-vis spectrophotometry. The experimental results revealed that the micelle morphology could be controlled by the addition of zinc ions. The proposed modulation mechanism involves the combination of hydrophobicity, metal coordination and repulsive interactions. Furthermore, the coordination bonds provide the micelles with good dynamic and thermal stability. We also found that the tadpole-shaped amphiphile could form reverse micelles with an average diameter of approximately 30 nm. (c) 2013 Elsevier Ltd. All rights reserved.