Controlled synthesis of cyclic helical polyisocyanides and bottlebrush polymers using a cyclic alkyne–Pd(ii) catalyst†
Zong-Quan
Wu 
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Abstract
Cyclic polymers have very unique structure and properties, and thus have drawn intense research attention. However, controlled synthesis of cyclic polymers with predictable molar mass and narrow distribution is still a challenging task. In this study, we developed a novel cyclic catalyst that initiates the ring-expansion polymerisation of isocyanides, producing a series of cyclic helical polymers with predictable molecular weight and low dispersity. Interestingly, the ring-expansion polymerization of the isocyanide macromonomers gives well-defined cyclic bottlebrush polymers. The cyclic topology was demonstrated using transmission electron microscopy.
- This article is part of the themed collection: Supramolecular & Macrocyclic chemistry
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