Precise Amphiphilic Giant Polymeric Chain Based on Nanosized Monomers with Exact Regio-Configuration
Precise Amphiphilic Giant Polymeric Chain Based on Nanosized Monomers with Exact Regio-Configuration
复制标题
基于具有精确区域构型的纳米单体的精确两亲巨型聚合物链
DOI：
10.1021/acsnano.1c04486
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发表时间：
2021
期刊：
影响因子：
17.1
通讯作者：
Dong Xue-Hui
中科院分区：
文献类型：
--
作者：
Liu Zhongguo;Chen Xin;Yang Ze;Wang Shuai;Gan Zhanhui;Li Gang;Dong Xue-Hui
由更长尺度的“巨型”单体组成的聚合物链为聚合物科学的基本原理提供了有趣的见解。在这项研究中，我们模块化地制备了一个库的离散的两亲性聚合物链使用分子纳米粒子作为重复单元，与精确控制的组成，链长，表面性质，和区域配置。这些巨大的聚合物链自组装成一个高度有序的相的丰富集合。精确的化学结构和均匀的链长消除了所有固有的分子“缺陷”，而纳米级单体放大了微小的结构差异，为在更大的长度尺度上系统地审查自组装行为提供了理想的平台。仔细研究了组成和区域构型的贡献。区域规则性被发现有一个直接和深刻的影响链构象，导致一个独特的分子包装方案，因此转移相边界。随着连接体长度的增加，区域约束逐渐减弱，相邻粒子最终会解耦。
Polymeric chains made of “giant” monomers at a larger length scale provide intriguing insights into the fundamental principles of polymer science. In this study, we modularly prepared a library of discrete amphiphilic polymeric chains using molecular nanoparticles as repeat units, with exact control of composition, chain length, surface property, and regio-configuration. These giant polymeric chains self-assembled into a rich collection of highly ordered phases. The precise chemical structure and uniform chain length eliminate all the inherent molecular “defects”, while the nanosized monomer amplifies minute structural differences, providing an ideal platform for a systematic scrutiny of the self-assembly behaviors at a larger length scale. The compositional and regio-configurational contribution was carefully studied. The regio-regularity is found to have a direct and profound impact on the chain conformation, leading to a distinct molecular packing scheme and therefore shifting the phase boundaries. With increasing the length of the linker, the regio-constraint gradually diminishes, and the neighboring particles would eventually be decoupled.