A modular approach toward functionalized three-dimensional macromolecules:: From synthetic concepts to practical applications
A modular approach toward functionalized three-dimensional macromolecules:: From synthetic concepts to practical applications
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DOI：
10.1021/ja028392s
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发表时间：
2003-01-22
影响因子：
15
通讯作者：
Hawker, CJ
中科院分区：
文献类型：
--
作者：
Bosman, AW;Vestberg, R;Hawker, CJ
探索了一种通过氮氧自由基聚合制备功能性多臂星星型聚合物的新方法。这种合成三维大分子结构的方法的一般性允许从组合非极性和极性乙烯基重复单元的广泛的不同均聚物、嵌段和无规共聚物构建纳米级限定的材料。官能团也可以沿着主链或作为外围/链端基被包括，从而调节星的限定部分的反应性和极性。这种合成三维大分子的模块化方法允许将这些定制的材料应用于氢键结合、纳米颗粒形成的多功能宿主和催化基团的支架。功能星在催化中的应用实例包括它们在Heck型偶联以及对映选择性加成反应中的用途。
A new strategy for the preparation of functional, multiarm star polymers via nitroxide-mediated "living" radical polymerization has been explored. The generality of this approach to the synthesis of three-dimensional macromolecular architectures allows for the construction of nanoscopically defined materials from a wide range of different homo, block, and random copolymers combining both apolar and polar vinylic repeat units. Functional groups can also be included along the backbone or as peripheral/chain end groups, thereby modulating the reactivity and polarity of defined portions of the stars. This modular approach to the synthesis of three-dimensional macromolecules permits the application of these tailored materials as multifunctional hosts for hydrogen bonding, nanoparticle formation, and as scaffolds for catalytic groups. Examples of applications of the functional stars in catalysis include their use in a Heck-type coupling as well as an enantioselective addition reaction.