Aluminum Tralen Complex Meditated Reversible-Deactivation Radical Polymerization of Vinyl Acetate
Journal
ACS Macro Letters
Journal Volume
9
Journal Issue
10
Pages
1423-1428
Date Issued
2020
Author(s)
Abstract
The AlIII(tralen)Cl complex (tralenH2 = N,N??di(cyclohepta-2,4,6-trien-1-one-2-yl)-1,2-diaminobenzene) has been synthesized and applied to mediate the reversible-deactivation radical polymerization (RDRP) of vinyl monomers. The polymerization of unconjugated monomers such as vinyl acetate (VAc) and N-vinylpyrrolidone (NVP) with AlIII(tralen)Cl showed the living characters of linearly increased molecular weight with conversion and formation of block copolymer. However, the control manners in the polymerization of conjugated monomers like acrylates and styrene were limited. The electron paramagnetic resonance (EPR) spectrum indicated that AlIII(tralen)BArF (BArF = tetrakis(3,5-trifluormethylphenyl)borate) and propagating radicals formed a paramagnetic dormant species, possibly PVAc-AlIII(tralen)BArF, via the single-electron transfer to the tralen ligand. ?
Other Subjects
Aluminum compounds;Atom transfer radical polymerization;Block copolymers;Boron compounds;Chlorine compounds;Electron spin resonance spectroscopy;Free radical reactions;Living polymerization;Organometallics;Paramagnetic resonance;Paramagnetism;Polyvinyl acetates;Styrene;Control manners;Dormant species;Electron paramagnetic resonances (EPR);N vinylpyrrolidone;Propagating radicals;Reversibledeactivation radical polymerization (RDRP);Single electron transfer;Vinyl monomers;Fluorine compounds
Type
journal article