ABC‐type Bola‐form Giant Surfactants: Synthesis and Self‐assembly
ABC‐type Bola‐form Giant Surfactants: Synthesis and Self‐assembly
复制标题
DOI：
10.1002/marc.202200319
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Wen-Bin Zhang
中科院分区：
文献类型：
--
作者：
Xiaojin Yan;Bo Hou;Yu Shao;Yu‐Chun Xu;Wei‐Yi Li;Qing‐Yun Guo;Jinlin He;Peihong Ni;Wen-Bin Zhang
Due to the fast phase separation kinetics and small feature size, the self-assembly of giant molecules has attracted lots of attention. However, there is not much study on multicomponent giant surfactants. In this work, through a modular synthetic strategy, different polyhedral oligomeric silsesquioxane (POSS)-based molecular nanoparticles are installed with diverse functionalities (hydrophobic octavinyl POSS (VPOSS), hydrophilic dihydroxyl-functionalized POSS (DPOSS), and omniphobic perfluoroalkyl-chain-functionalized POSS (FPOSS)) on the ends of one polystyrene (PS) chain to build up a series of triblock bola-form giant surfactants denoted as XPOSS–PSn–FPOSS (X represents V or D). The target molecules are prepared by a combination of atom transfer radical polymerization (ATRP), esterification, as well as Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) and thiol–ene “click” reactions. These macromolecules are thoroughly characterized by combined technologies including nuclear magnetic resonance (NMR), size exclusion chromatography (SEC), and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry MALDI-TOF MS analyses. It is revealed by small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) that VPOSS–PSn–FPOSS adopts a two-phase separation scenario where VPOSS and POSS are segregated in one phase. DPOSS–PSn–FPOSS with a third hydrophilic DPOSS shows a three-phase separation scenario, where highly ordered phase structures are difficult to develop owing to the competition of mutual phase separation processes and may be trapped in kinetically metastable states.
