Microwave-assisted N,N-dialkylation of amine-functionalized periodic mesoporous phenylene-silica: An easy and fast way to design materials
authors Lourenco, MAO; Ferreira, MJG; Sardo, M; Mafra, L; Gomes, JRB; Ferreira, P
nationality International
journal MICROPOROUS AND MESOPOROUS MATERIALS
author keywords Periodic mesoporous organosilica; Microwave-assisted functionalization; N,N-dialkylation; Tertiary amine materials
keywords ORGANIC GROUPS; CO2 CAPTURE; ADSORPTION; ORGANOSILICAS; FRAMEWORKS; WALLS; PMO; CH4
abstract N,N-dialkylation reaction of mesoporous aniline-silica is successfully achieved with nearly total conversion of the amine-phenylene periodic mesoporous organosilica (NH2-PMO) to the N,N-dialkylated amine material. Microwave-assisted dialkylation was optimized. Two cycles are required to promote the reaction of 2-bromopropane with the NH2-PMO and obtain the (iPr)(2)-N-PMO material, with preservation of both meso- and molecular-orders. A similar procedure, using 3-chloropropionitrile as alkylation agent in the same condition parameters, was used to obtain the (NCCH2CH2)(2)-N-PMO material, also maintaining both meso- and molecular-scale periodicities. This material opens an avenue for the preparation of new functional materials by conversion of the nitrile group into amines, carboxylic acids, amino acids and chiral groups, according to the desired application, by subtle modifications in the synthetic methodology. (c) 2017 Elsevier Inc. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 1387-1811
isbn 1873-3093
year published 2017
volume 249
beginning page 10
ending page 15
digital object identifier (doi) 10.1016/j.micromeso.2017.04.016
web of science category Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000404315500002
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journal impact factor 3.649
5 year journal impact factor 3.538
category normalized journal impact factor percentile 71.483
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