Multicomponent spiropolymerization of diisocyanides, alkynes and carbon dioxide for constructing 1,6-dioxospiro[4,4]nonane-3,8-diene as structural units under one-pot catalyst-free conditions

• Published in: Polymer chemistry Vol. 9; no. 46; pp. 5543 - 5550
• Main Authors: Fu, Weiqiang, Dong, Lichao, Shi, Jianbing, Tong, Bin, Cai, Zhengxu, Zhi, Junge, Dong, Yuping
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 14.12.2018
• Subjects: Air pollution; Alkynes; Carbon dioxide; Catalysis; Catalysts; Greenhouse effect; Greenhouse gases; Materials science; Molecular weight; Monomers; NMR; Nuclear magnetic resonance; Polymer chemistry; Polymerization; Solubility; Structural analysis; Thermal stability
• ISSN: 1759-9954; 1759-9962
• DOI: 10.1039/C8PY01336E

Carbon dioxide (CO 2 ) is a greenhouse gas whose release should be reduced to as low as possible. However, using this gas is another method for reducing the greenhouse effect. In this work, a novel multicomponent spiropolymerization was developed by using diisocyanides, alkynes and CO 2 based on catalyst-free one-pot polymerization under mild experimental conditions. A structural unit with 1,6-dioxospiro[4,4]nonane-3,8-diene as one of the main chains was instantly formed by converting CO 2 into spirosegments, and these resultant spiropolymers had high weight-average molecular weights ( M w s, up to 59 000) and good yields (up to 87.7%). In detail, the effect of the diisocyanide monomers on the M w s, yields and solubility of the resultant spiropolymers was investigated and discussed. The obtained spiropolymers showed excellent solubility and high thermal stability. Thus, a simple and high-atom-economical spiropolymerization for preparing new spiropolymers was established by taking full advantage of CO 2 and resulted in a unique spiroarchitecture by catalyst-free one-pot polymerization, which provided new kinds of spiropolymers for the materials science field.