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Redox-Switchable Ring-Opening Polymerization with Ferrocene Derivatives
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2019-02-01 00:00:00 , DOI: 10.1021/acs.accounts.8b00523
Junnian Wei 1 , Paula L. Diaconescu 1
Affiliation  

Switchable catalysts incorporate stimuli-responsive features and allow synthetic tasks that are difficult or impossible to accomplish in other ways. They mimic biological processes in that they can provide both spatial and temporal control, unlike most reactions promoted by human-made catalysts that usually occur according to carefully optimized conditions. In the area of switchable catalysis, redox-switchable ring-opening polymerization (ROP) has attracted much attention, emerging as a powerful strategy for the development of environmentally friendly biodegradable copolymers, especially those containing blocks with complementary properties. Controlling the sequence and regularity of each copolymeric building block can affect the material properties significantly since they are directly related to the respective microstructures. Such control can be exerted with a well-designed redox-switchable catalyst by timing the oxidation and reduction events. In highly selective systems, one form of the catalyst reacts with a monomer until the redox state of the catalyst is altered, at which point the altered state of the catalyst reacts with another monomer. The reaction time may be varied from one cycle to another to generate various designer multiblock copolymers.

中文翻译:

二茂铁衍生物的氧化还原可开环聚合

可转换的催化剂结合了刺激响应特性,可以完成难以或不可能以其他方式完成的合成任务。它们模仿生物过程,因为它们可以提供空间和时间上的控制,这与通常在精心优化的条件下发生的人造催化剂所促进的大多数反应不同。在可转换催化领域,氧化还原可转换开环聚合(ROP)引起了人们的广泛关注,成为开发环保型生物可降解共聚物(尤其是那些具有互补性质的嵌段共聚物)的有力策略。控制每个共聚物结构单元的顺序和规则性会显着影响材料性能,因为它们直接与相应的微观结构有关。可以通过定时设计氧化和还原事件,使用设计良好的氧化还原可转换催化剂进行这种控制。在高度选择性的系统中,一种形式的催化剂与单体反应,直到催化剂的氧化还原状态改变为止,此时催化剂的改变态与另一种单体反应。反应时间可以从一个循环改变到另一个循环,以产生各种设计的多嵌段共聚物。
更新日期:2019-02-01
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