Microwave assisted N-alkylation of amine functionalized crystal-like mesoporous phenylene-silica


N-Alkylation reaction of amine functionalized phenylene moieties in crystal-like mesoporous silica is successfully achieved with about 87% of conversion in two reaction cycles. A potassium iodide catalyzed method commonly used for the selective N-monoalkylation of aniline is adapted and optimized to the N-monoalkylation reactions of the amine functionalized periodic mesoporous phenylene-silica (NH2-PMO) under microwave irradiation with preservation of the ordered mesostructure and of the crystal-like molecular scale periodicity of the material. This functionalization opens an avenue for the preparation of new materials with different amino-alkyl groups specially designed for a desired application, namely on the adsorption or catalytic fields.



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Lourenco, MAO; Siegel, R; Mafra, L; Ferreira, P

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The authors thank FCT and FEDER (QREN - COMPETE) for funding the projects PTDC/EQU-EQU/099423/2008, PTDC/QUI-QUI/100998/2008 and PEst-C/CTM/LA0011/2011. FCT is acknowledged for financing the Portuguese NMR Network (RNRMN), the Post-Doc grant SFRH/BPD/44355/2008 (to R.S.) and the PhD grant SFRH/BD/80883/2011 (to M.A.O.L.).

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