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Encapsulation of a Palladium Schiff‐Base Complex into the Nanocages of Mesoporous SBA‐16 as an Efficient Heterogeneous Catalyst for the Suzuki‐Miyaura Coupling Reaction in Water
Author(s) -
Niakan Mahsa,
Asadi Zahra,
MasteriFarahani Majid
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803458
Subject(s) - nanocages , catalysis , palladium , mesoporous material , schiff base , aryl , chemistry , heterogeneous catalysis , coupling reaction , halide , aqueous solution , combinatorial chemistry , chemical engineering , organic chemistry , polymer chemistry , alkyl , engineering
A palladium Schiff base complex was successfully encapsulated in the nanocages of SBA‐16 by post‐reducing the pore entrance size through a simple silylation method. The prepared material was demonstrated to be a high‐performance and efficient heterogeneous catalyst in the Suzuki‐Miyaura reaction of a wide range of aryl halides with arylboronic acids even with low palladium loading (0.01 mol%) under mild aqueous condition. The catalyst could be recovered by simple filtration from the reaction mixture and reused for eight cycles with no change in catalytic performance confirming its good stability. Comparison of the activity of free and encapsulated complex revealed that placement of the complex in the nanocages of SBA‐16 did not compromise its catalytic activity. Moreover, based on the experimental results, we proposed a possible reaction mechanism, which was further confirmed by density functional theory (DFT) calculations.