TY - JOUR
T1 - Fast and Complete Neutralization of Thiocarbonylthio Compounds Using Trialkylborane and Oxygen: Application to Their Removal from RAFT-Synthesized Polymers
AU - Alagi, Prakash
AU - Hadjichristidis, Nikos
AU - Gnanou, Yves
AU - Feng, Xiaoshuang
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): BAS/1/1374-01-01
Acknowledgements: This research work is supported by KAUST under baseline funding (BAS/1/1374-01-01).
PY - 2019/5/24
Y1 - 2019/5/24
N2 - A rapid and efficient method to remove thiocarbonylthio end groups from polymers prepared by reversible addition–fragmentation chain transfer (RAFT) is described. The elimination process is obtained in less than 1 min by treating the solution of RAFT-synthesized polymers with 5 equiv of trialkylborane (TAB) in the presence of oxygen under an ambient temperature. The versatility of this method was checked on the most relevant families of thiocarbonylthio chain transfer agents (CTA), including dithioesters, trithiocarbonates, dithiocarbamates, and xanthates, carried by the corresponding RAFT-synthesized polymers. UV, NMR, and MALDI-TOF MS characterization results all confirm the complete removal of their terminal CTA groups.
AB - A rapid and efficient method to remove thiocarbonylthio end groups from polymers prepared by reversible addition–fragmentation chain transfer (RAFT) is described. The elimination process is obtained in less than 1 min by treating the solution of RAFT-synthesized polymers with 5 equiv of trialkylborane (TAB) in the presence of oxygen under an ambient temperature. The versatility of this method was checked on the most relevant families of thiocarbonylthio chain transfer agents (CTA), including dithioesters, trithiocarbonates, dithiocarbamates, and xanthates, carried by the corresponding RAFT-synthesized polymers. UV, NMR, and MALDI-TOF MS characterization results all confirm the complete removal of their terminal CTA groups.
UR - http://hdl.handle.net/10754/656100
UR - http://pubs.acs.org/doi/10.1021/acsmacrolett.9b00357
UR - http://www.scopus.com/inward/record.url?scp=85066408963&partnerID=8YFLogxK
U2 - 10.1021/acsmacrolett.9b00357
DO - 10.1021/acsmacrolett.9b00357
M3 - Article
SN - 2161-1653
VL - 8
SP - 664
EP - 669
JO - ACS Macro Letters
JF - ACS Macro Letters
IS - 6
ER -