Linh Duy Thai, Jochen A. Kammerer, Patrick Théato, Hatice Mutlu* and Christopher Barner-Kowollik*,
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引用次数: 0
摘要
出于经济原因和避免金属-聚合物相互作用的考虑,通过不依赖金属催化的聚合技术合成的主链刺激响应型聚合物非常受欢迎。在本文中,我们介绍了一种无金属头尾有机碱催化的羟基-炔单键聚合 AB 型单体的方法,从而实现了以α-双胺为主链重复单元的光开关聚合物。所制备的主α-双胺基聚合物在溶液中表现出优异的光开关性能。我们进一步通过硫醇-迈克尔反应,用各种硫醇化合物对获得的聚合物进行后官能化,从而显著降低了玻璃化转变温度(Tg),这可能有利于固态光开关过程。因此,本文介绍的聚合技术不仅提供了获得主链刺激响应型聚合物的无金属途径,还允许对获得的聚合物进行灵活的后修饰,以生成具有可调特性的高级大分子结构。
Access to Main-Chain Photoswitching Polymers via Hydroxyl-yne Click Polymerization
Main-chain stimuli-responsive polymers synthesized via polymerization techniques that do not rely on metal-based catalysis are highly desirable for economic reasons and to avoid metal–polymer interactions. Herein, we introduce a metal-free head-to-tail organobase-catalyzed hydroxyl-yne click polymerization of an AB-type monomer to realize photoswitchable polymers featuring α-bismines as main-chain repeating units. The prepared main-chain α-bisimine-based polymers show excellent photoswitching in solution. We further post-functionalize the obtained polymers with various thiol compounds via thiol-Michael reactions to significantly lower the glass transition temperature (Tg), likely to be beneficial for the photoswitching process in the solid state. Thus, the herein introduced polymerization technique not only provides metal-free access to main-chain stimuli-responsive polymers, but also allows for the flexible post-modification of the obtained polymers to generate advanced macromolecular architectures with tunable properties.
期刊介绍:
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.