传统硼自由基较不稳定并不能应用于有机自由基化学中，使用氮杂环卡宾路易斯碱进行配位可稳定硼自由基。硼自由基可在氧气环境下引发自由基反应，同时硼自由基可高效地对卤化物和双硫酯等基团进行还原等。该项目利用硼自由基化学的独特性拟在以下几个方面对可控自由基聚合领域做出重要的创新性突破：1）氧气引发的基于硼自由基的可控自由基聚合反应，2）硼自由基为活性中间体的聚合物末端的还原和后修饰，和3）非氧化还原体系的硼自由基引导的非金属可控自由基聚合反应。

The traditional boryl radicals are not stable and can not be used in organic free radical chemistry, the use of a N-heterocyclic carbene as Lewis base as coordination can stabilize the boryl radicals. Boryl radicals can initiate free radical reactions in oxygen environment, while boryl radicals can efficiently reduce functional groups such as halides and dithioesters. This project aims to take advantage of the uniqueness of these chemistry of boryl radical to propose important breakthroughs in the field of controlled radical polymerization in the following directions: 1) oxygen-initiated and boryl radical based controlled radical polymerization, 2) boryl radical based reduction and post-modification of polymer chain-end functionality, and 3) boryl radical-guided and non-redox system controlled radical polymerization.