Alkyne monomers are indispensable for the preparation of new functional polymers. Thanks to the strong electron-withdrawing ability of sulfonyl group, bis(ethynylsulfone)s show high reactivity. At present, ethynylsulfone-based spontaneous amino-yne click polymerization has been successfully established which shows excellent universality and polymerization results. However, this area should be further developed. In this work, an organobase-catalyzed hydroxyl-yne click polymerization based on bis(ethynylsulfone)s and diphenol monomers was developed. Under very mild conditions, polymers with high weight-averaged molecular weights (Mw, up to 85 900) were obtained in the yields up to 88.8%. In addition, the as-prepared polymers possess good solubility, thermostability and film-forming ability. The polymer films prepared by spin-coating approach show high refractive index (n632.8 = 1.658), making it promising in application as optical materials.

Ethynylsulfone-based hydroxyl-yne click polymerization

ACS Spring 2022

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