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dc.contributor.authorZhang, Dongyue
dc.contributor.authorBoopathi, Senthil
dc.contributor.authorHadjichristidis, Nikos
dc.contributor.authorGnanou, Yves
dc.contributor.authorFeng, Xiaoshuang
dc.date.accessioned2017-01-02T09:28:30Z
dc.date.available2017-01-02T09:28:30Z
dc.date.issued2016-08-26
dc.identifier.citationZhang D, Boopathi SK, Hadjichristidis N, Gnanou Y, Feng X (2016) Metal-Free Alternating Copolymerization of CO2with Epoxides: Fulfilling “Green” Synthesis and Activity. Journal of the American Chemical Society 138: 11117–11120. Available: http://dx.doi.org/10.1021/jacs.6b06679.
dc.identifier.issn0002-7863
dc.identifier.issn1520-5126
dc.identifier.pmid27529725
dc.identifier.doi10.1021/jacs.6b06679
dc.identifier.urihttp://hdl.handle.net/10754/622428
dc.description.abstractPolycarbonates were successfully synthesized for the first time through the anionic copolymerization of epoxides with CO2, under metal-free conditions. Using an approach based on the activation of epoxides by Lewis acids and of CO, by appropriate cations, well-defined alternating copolymers made of CO, and propylene oxide (PO) or cyclohexene oxide (CHO) were indeed obtained. Triethyl borane was the Lewis acid chosen to activate the epoxides, and onium halides or onium alkoxides involving either ammonium, phosphonium, or phosphazenium cations were selected to initiate the copolymerization. In the case of PO, the carbonate content of the poly(propylene carbonate) formed was in the range of 92-99% and turnover numbers (TON) were close to 500; in the case of CHO perfectly alternating poly(cyclohexene carbonate) were obtained and TON values were close to 4000. The advantages of such a copolymerization system are manifold: (i) no need for multistep catalyst/ligand synthesis as in previous works; (ii) no transition metal involved in the copolymer synthesis and therefore no coloration of the samples isolated; and (iii) no necessity for postsynthesis purification.
dc.description.sponsorshipKing Abdullah University of Science and Technology
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/full/10.1021/jacs.6b06679
dc.titleMetal-Free Alternating Copolymerization of CO2with Epoxides: Fulfilling “Green” Synthesis and Activity
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentPolymer Synthesis Laboratory
dc.identifier.journalJournal of the American Chemical Society
kaust.personZhang, Dongyue
kaust.personBoopathi, Senthil
kaust.personHadjichristidis, Nikos
kaust.personGnanou, Yves
kaust.personFeng, Xiaoshuang
dc.date.published-online2016-08-26
dc.date.published-print2016-09-07


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