学術雑誌論文

学術雑誌論文

text

Macromolecules. 2020, 53(11), p. 4185-4192

Metal-Free Living Cationic Polymerization Using Diaryliodonium Salts as Organic Lewis Acid Catalysts

American Chemical Society

英語

text

2020-03-20

https://doi.org/10.1021/acs.macromol.0c00823

Haraguchi R., Nishikawa T., Kanazawa A., et al. Metal-Free Living Cationic Polymerization Using Diaryliodonium Salts as Organic Lewis Acid Catalysts. Macromolecules Vol. 53, Issue 11, pp. 4185-4192 (2020).

A metal-free initiating system for the living cationic polymerization of alkyl vinyl ethers (VEs) and styrene derivatives was developed using diaryliodonium salts as an organic Lewis acid catalyst. Unlike many past examples of their use as a photoinitiator, diaryliodonium salts were demonstrated to function as a Lewis acid catalyst for cationic polymerization. The cationic polymerization of isobutyl VE smoothly proceeded using a diaryliodonium salt in conjunction with a cationogen that generates a carbon-halogen propagating end, yielding polymers with predictable molecular weights and very narrow molecular weight distributions. The central iodine atom of the diaryliodonium salt most likely exhibited Lewis acidity, thereby generating a dormant-active equilibrium through the reversible generation of a carbocation via the abstraction of the halogen anion from the propagating end. The role of the diaryliodonium salts as Lewis acid catalysts was confirmed by a series of experiments that focused on the effects of concentrations, substituents on the aryl rings, and counteranions. Polymerizations of styrene derivatives and VEs with polar groups also proceeded using diaryliodonium salts in a controlled manner.

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.macromol.0c00823.

103825

Metal-Free Living Cationic Polymerization Using Diaryliodonium Salts as Organic Lewis Acid Catalysts

American Chemical Society

英語

2020-03-20

Macromolecules

53

11

4185

4192

https://doi.org/10.1021/acs.macromol.0c00823

https://hdl.handle.net/11094/103825