Synthesis, Crystallization And Photoresponsive Behavior of Azobenzene-Containing Diblock Copolymers

IF 5.2 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-09-24 DOI:10.1021/acs.macromol.5c01177

Xinyi Pan, Qinguan Zhang, Yaning He

引用次数: 0

Abstract

High-density functional groups can be introduced into block copolymer single crystals, by designing appropriate noncrystalline blocks. However, maintaining material functionality requires sufficient local free volume, which has received limited attention to date. Herein, a series of diblock copolymers bearing multiple azobenzene moieties were synthesized. Crystals with varying morphologies were obtained via both cocrystallization and epitaxial growth strategies. The photoresponsive behavior of the resulting crystals was systematically investigated. The isomerization rate of azobenzene moieties is directly correlated with the surface functional group density, while the isomerization efficiency is further influenced by the crystal morphology. These findings highlight the importance of balancing surface group density with available local free volume, offering valuable insights into the design of hierarchical two-dimensional nanomaterials with tunable properties.

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含偶氮苯二嵌段共聚物的合成、结晶及光响应行为

通过设计合适的非晶嵌段，可以将高密度官能团引入嵌段共聚物单晶中。然而，维持材料功能需要足够的本地空闲体积，这一点迄今为止受到的关注有限。本文合成了一系列含有多个偶氮苯基团的二嵌段共聚物。通过共晶和外延生长策略获得了不同形貌的晶体。系统地研究了所得晶体的光响应行为。偶氮苯部分的异构化速率与表面官能团密度直接相关，而异构化效率还受晶体形态的影响。这些发现强调了平衡表面基团密度和可用的局部自由体积的重要性，为设计具有可调性能的分层二维纳米材料提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.