Photoinitiated polymerizations are commonly used in industrial processes; however, photocontrolled methods are far less developed. Employing visible light as a tunable external stimulus to switch a catalyst between its active and dormant states has been demonstrated to be an effective strategy for photocontrolled radical and cationic polymerizations. We report a [2+2+2] cycloaddition polymerization via light-gated cobalt catalysis. Using this methodology, block copolymerizations were performed and their molecular weights were regulated using visible light irradiation.

Applications of light-gated cobalt catalysis to a [2+2+2] cycloaddition polymerization

254th National Meeting (2017)

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