Design and application of sporopollenin microcapsule supported palladium catalyst: Remarkably high turnover frequency and reusability in catalysis of biaryls
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Academic Press
Access Rights
info:eu-repo/semantics/openAccess
Abstract
Bio-based catalyst support materials with high thermal and structural stability are desired for catalysts systems requiring harsh conditions. In this study, a thermally stable palladium catalyst (up to 440 C) was designed from sporopollenin, which occurs naturally in the outer exine layer of pollens and is widely acknowledged as chemically very stable and inert biological material. Catalyst design procedure included (1) extraction of sporopollenin microcapsules from Betula pendula pollens (.25 i.tm), (2) aminofunctionalisation of the microcapsules, (3) Schiff base modification and (4) preparation of Pd(II) catalyst. The catalytic activity of the sporopollenin microcapsule supported palladium catalyst was tested in catalysis of biaryls by following a fast, simple and green microwave -assisted method. We recorded outstanding turnover number (TON: 40,000) and frequency (TOF: 400,000) for the catalyst in Suzuki coupling reactions. The catalyst proved to be reusable at least in eight cycles. The catalyst can be suggested for different catalyst systems due to its thermal and structural durability, reusability, inertness to air and its eco-friendly nature. (C) 2016 Elsevier Inc. All rights reserved.
Description
Keywords
Suzuki Coupling Reaction, Schiff Base, Silylation, Betula Pendula, Pollen
Journal or Series
Journal of Colloıd and Interface Scıence
WoS Q Value
N/A
Scopus Q Value
Q1
Volume
486
