A high-throughput study of cyclic and polymeric carbonates synthesized from CO2 and epoxides with iron(III) pyridylamino-bis(phenolate) catalysts
The atom-efficient reaction of a nontoxic, inexpensive and renewable C1-feedstock as CO2 with a variety of epoxide substrates and oxetane was studied employing iron(III) pyridylamino- bis(phenolate) complexes as homogeneous catalysts. These complexes can act as bifunctional catalyst to promote the r...
| Autores: | , , , , |
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| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2015 |
| País: | España |
| Recursos: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2072/356175 |
| Acesso em linha: | http://hdl.handle.net/2072/356175 https://doi.org/10.1002/cssc.201403323 |
| Access Level: | acceso abierto |
| Palavra-chave: | 54 |
| Resumo: | The atom-efficient reaction of a nontoxic, inexpensive and renewable C1-feedstock as CO2 with a variety of epoxide substrates and oxetane was studied employing iron(III) pyridylamino- bis(phenolate) complexes as homogeneous catalysts. These complexes can act as bifunctional catalyst to promote the reaction between CO2 and epoxides, but the addition of a Lewis base co- catalyst allows to reduce significantly the amount of iron complex needed to achieve high epoxide conversion. The possibility to control the selectivity of the reaction towards each of the two possible products of the reaction, i.e. cyclic carbonate and polycarbonate, was evaluated. An efficient switch in selectivity could be achieved when cyclic epoxides as cyclohexene oxide and the seldom explored 1,2-epoxy-4-vinylcyclohexane were used as substrates. For the polycarbonate prepared with the latter epoxide, a post-synthetic cross-linking reaction was performed, leading to a substantial increase in the glass transition temperature and chemical resistance of the polymer. |
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