期刊
POLYMER CHEMISTRY
卷 8, 期 46, 页码 7188-7194出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7py01702b
关键词
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资金
- NSF Graduate Research Fellowship program
- NIH [T34GM113848]
- Dow Chemical Company
- European Union's Horizon 2020 research and innovation programme for Marie Curie Global Fellowships [705041, 657650]
- California NanoSystems Institute
- NSF MRSEC Program [DMR 1720256]
- Marie Curie Actions (MSCA) [705041, 657650] Funding Source: Marie Curie Actions (MSCA)
We report a simple and efficient transformation of thiol and thiocarbonylthio functional groups to bromides using stable and commercially available brominating reagents. This procedure allows for the quantitative conversion of a range of small molecule thiols (including primary, secondary and tertiary) to the corresponding bromides under mild conditions, as well as the facile chain-end modification of polystyrene (PS) homopolymers and block copolymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization. Specifically, the direct chain-end bromination of PS prepared by RAFT was achieved, where the introduced terminal bromide remained active for subsequent modification or chain-extension using classical atom transfer radical polymerization (ATRP). This transformation sets the foundation for bridging RAFT and ATRP, two of the most widely used controlled radical polymerization (CRP) strategies, and enables the preparation of chain-end functionalized block copolymers not directly accessible using a single CRP technique.
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