Polyacetylene-Based Asymmetric Bicyclic Polymer by Blocking-Cyclization Technique.

A rare asymmetric bicyclic polymer containing different length of conjugated polyacetylene segments was synthesized by metathesis cyclopolymerization-mediated blocking-cyclization technique. The size of each single ring differed from each other, and the unique cyclic polymer topology was controlled by adjusting the feed ratio of monofunctional monomer to catalyst. The topological difference between linear and bicyclic polymers was confirmed by several techniques, and the visualized morphology of asymmetric bicyclic polymer was directly observed without tedious post-modification process. The photoelectric and thermal properties of polymers were investigated. This work expanded the pathway for the derivation of cyclic polymers, and such unique topological structure enriched the diversity of cyclic polymer classes. This article is protected by copyright. All rights reserved.