Efficient polymer dimerization method based on self-accelerating click reaction.
Efficient polymer dimerization method based on self-accelerating click reaction.
复制标题
基于自加速点击反应的高效聚合物二聚方法
作者：
发展了一种基于自加速双应变促进叠氮-炔环加成（DSPAAC）的高效聚合物二聚方法。在这种方法中，可以有效地制备不同的聚合物二聚体通过偶联叠氮封端的聚合物结构单元由对称-二苯并-1，5-环辛-3，7-二炔（DIBOD）小连接体。这种方法的显著优点可以概括如下。首先，叠氮化物封端的聚合物结构单元可以容易地制备为具有不同的分子拓扑结构，例如线性、星星和树枝状形状。其次，DSPAAC偶联反应的自加速性质允许该方法在过量摩尔量的DIBOD小连接体存在下有效地制备纯聚合物二聚体至叠氮化物封端的聚合物结构单元。第三，DSPAAC偶联反应的点击性质有利于在非常温和的环境反应条件下进行二聚反应。因此，该方法为制备具有对称分子结构的拓扑聚合物，如嵌段、星星和树枝状聚合物提供了一种强有力的工具。基于自加速双应力促进叠氮-炔环加成反应，通过叠氮封端聚合物的二聚反应，发展了一种简便、有效的制备具有对称分子结构的拓扑聚合物的方法。
An efficient polymer dimerization method is developed on a self-accelerating double strain-promoted azide–alkyne cycloaddition (DSPAAC) click reaction. In this approach, varied polymer dimers can be efficiently prepared by coupling azide terminated polymer building blocks by sym-dibenzo-1,5-cyclooctadiene-3,7-diyne (DIBOD) small linkers. The distinct advantages of this method can be summarized as follows. First, the azide terminated polymer building blocks can be easily prepared with varied molecular topologies such as linear, star, and dendritic shapes. Second, the self-accelerating property of DSPAAC coupling reaction allows the method to efficiently prepare pure polymer dimers in the presence of excess molar amounts of DIBOD small linkers to azide-terminated polymer building blocks. Third, the click property of DSPAAC coupling reaction facilitates the dimerization reaction with a very mild ambient reaction condition. As a result, this method provides a powerful tool to fabricate topological polymers with a symmetrical molecular structure such as block, star, and dendritic polymers. A convenient and efficient method was developed to prepare topological polymers with a symmetric molecular structure by dimerizing azide terminated polymers based on the self-accelerating double strain-promoted azide–alkyne cycloaddition reaction.
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