Fabrication of a high-quality, porous, surface-confined covalent organic framework on a reactive metal surface
Abstract
A major goal of heterogeneous catalysis is to optimize catalytic selectivity. Selectivity is often limited by the fact that most heterogeneous catalysts possess sites with a range of reactivities, resulting in the formation of unwanted by-products. The construction of surface-confined covalent organic frameworks (sCOFs) on catalytically active surfaces is a desirable strategy, as pores can be tailored to operate as catalytic nanoreactors. Direct modification of reactive surfaces is impractical, because the strong molecule–surface interaction precludes monomer diffusion and formation of extended architectures. Herein, we describe a protocol for the formation of a high-quality sCOF on a Pd-rich surface by first fabricating a porous sCOF through Ullmann coupling on a Au-rich bimetallic surface on Pd(111). Once the sCOF has formed, thermal processing induces a Pd-rich surface while preserving the integrity of the sCOF architecture, as evidenced by scanning tunneling microscopy and titration of Pd sites through CO adsorption.
Citation
Larrea , C R & Baddeley , C J 2016 , ' Fabrication of a high-quality, porous, surface-confined covalent organic framework on a reactive metal surface ' , ChemPhysChem , vol. 17 , no. 7 , pp. 971–975 . https://doi.org/10.1002/cphc.201600027
Publication
ChemPhysChem
Status
Peer reviewed
ISSN
1439-4235Type
Journal article
Rights
© 2016 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
Funding: EPSRC DTA (EP/M506631/1).Collections
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