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One‐Pot Multistep Cascade Reactions over Multifunctional Nanocomposites with Pd Nanoparticles Supported on Amine‐Modified Mesoporous Silica
Author(s) -
Li Ping,
Liu Hua,
Yu Yu,
Cao ChangYan,
Song WeiGuo
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201300514
Subject(s) - catalysis , mesoporous material , amine gas treating , nanocomposite , mesoporous silica , chemical engineering , nanoparticle , diffusion , chemistry , cascade , materials science , polymer chemistry , organic chemistry , nanotechnology , chromatography , physics , engineering , thermodynamics
Two kinds of multifunctional nanocomposites, SBA‐15‐NH 2 /Pd‐p and SBA‐15‐NH 2 /Pd‐f, with platelet‐like and fiber‐like morphologies, respectively, were fabricated by immobilizing Pd NPs onto amine‐functionalized SBA‐15. Some of the amino groups acted as anchoring sites for Pd NPs, whilst the remaining groups acted as Brønsted basic sites. As a result, the composites served as excellent multifunctional heterogeneous catalysts for one‐pot multistep cascade reaction sequences. Moreover, when diffusion was the rate‐determine step, SBA‐15‐NH 2 /Pd‐p, with small mesopores, was superior to the fiber‐like control sample, owing to its short diffusion length, a lower possibility of pore clogging, and better mass transportation for the reaction species during the catalysis .