Fluoride-promoted carbonylation polymerization: a facile step-growth technique to polycarbonates
Fluoride-Promoted Carbonylation (FPC) polymerization is herein presented as a novel catalytic polymerization methodology that complements ROP and unlocks a greater synthetic window to advanced polycarbonates. The overall two-step strategy is facile, robust and capitalizes on the synthesis and step-g...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Universidad de Alcalá (UAH) |
| Repositorio: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Idioma: | inglés |
| OAI Identifier: | oai:ebuah.uah.es:10017/35220 |
| Acesso em linha: | http://hdl.handle.net/10017/35220 https://dx.doi.org/10.1039/C6SC05582F |
| Access Level: | acceso abierto |
| Palavra-chave: | Cesium Fluoride polymerization 1,1'-carbonyldiimidazole polycarbonates Química Chemistry |
| Resumo: | Fluoride-Promoted Carbonylation (FPC) polymerization is herein presented as a novel catalytic polymerization methodology that complements ROP and unlocks a greater synthetic window to advanced polycarbonates. The overall two-step strategy is facile, robust and capitalizes on the synthesis and step-growth polymerization of bis-carbonylimidazolide and diol monomers of 1,3- or higher configurations. Cesium fluoride (CsF) is identified as an efficient catalyst and the bis-carbonylimidazolide monomers are synthesized as bench-stable white solids, easily obtained on 50&#-100 g scales from their parent diols using cheap commercial 1,1&;8242#-carbonyldiimidazole (CDI) as activating reagent. The FPC polymerization works well in both solution and bulk, does not require any stoichiometric additives or complex settings and produces only imidazole as a relatively low-toxicity by-product. As a proof-of-concept using only four diol building-blocks, FPC methodology enabled the synthesis of a unique library of polycarbonates covering (i) rigid, flexible and reactive PC backbones, (ii) molecular weights 5&#-20 kg mol&;8722#1, (iii) dispersities of 1.3&#-2.9 and (iv) a wide span of glass transition temperatures, from &;8722#45 up to 169 °C. |
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