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Title

Phosphazene decorated porous polymeric aromatic frameworks: a heterogeneous catalyst for ring-opening polymerization

AuthorsLiras, Marta ; Sánchez, F.; Verde-Sesto, Ester ; Iglesias, Marta
Issue Date2015
Citation1st European Conference on Metal Organic Frameworks and Porous Polymers (2015)
AbstractAliphatic polyesters prepared by Ring Opening Polymerization (ROP) of lactones1 are worldwide used in biomedical applications. So, the fact of find heterogeneous catalysis methods acquires importance. Herein we described the synthesis of a new porous polymeric aromatic framework (PPAF)2 based on an adamantane unit as node, as well as the post-functionalization with covalently bounded phosphazene groups. The post-functionalization transformations do not change the porous properties of the parent material at low loading. This material was successfully used as superbase heterogeneous catalyst in ROP of lactones, showing an increase in the turnover frequency (ca. 27.00 h-1in the case of -gama valerolactone ( -VL) and ca. 6.50 h-1in the case of –caprolactone (-CL) as comparing with its homogeneous counterpart. Polymers synthesized show polydispersity lower than 1.5 and linear relationship between molecular weight and conversion which is characteristic of a living polymerization. This catalytic material has been recycled 3-4 times for two studied polymerizations.
DescriptionPresentation given at the 1st European Conference on Metal Organic Frameworks and Porous Polymers, held on October 11-14th, 2015, Potsdam (Germany).
URIhttp://hdl.handle.net/10261/185293
Appears in Collections:(ICTP) Comunicaciones congresos
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