Issue 6, 2013

Stabilizing unstable species through single-site isolation: a catalytically active TaV trialkyl in a porous organic polymer

Abstract

A catechol-functionalized porous organic polymer (POP) has been successfully metallated with a TaV trialkyl and remains thermally and structurally robust. The resulting POP-supported (catecholato)TaV trialkyl sites remain accessible to small molecules and can undergo reactions to yield stable, monomeric complexes that are quite different from those observed with the homogeneous analogues. Using a combination of reactivity studies, high-resolution solid-state NMR spectroscopy, and X-ray absorption spectroscopy (XAS), we are able to precisely determine the functionality and coordination environment of the active (catecholato)TaV trialkyl site and its products in reactions with Brønsted acids. Additionally, the Ta-metallated POP was found to have enhanced catalytic activity in the hydrogenation of cyclohexene and toluene relative to a homogeneous analogue.

Graphical abstract: Stabilizing unstable species through single-site isolation: a catalytically active TaV trialkyl in a porous organic polymer

Supplementary files

Article information

Article type
Edge Article
Submitted
18 Dec 2012
Accepted
22 Feb 2013
First published
25 Feb 2013

Chem. Sci., 2013,4, 2483-2489

Stabilizing unstable species through single-site isolation: a catalytically active TaV trialkyl in a porous organic polymer

K. K. Tanabe, N. A. Siladke, E. M. Broderick, T. Kobayashi, J. F. Goldston, M. H. Weston, O. K. Farha, J. T. Hupp, M. Pruski, E. A. Mader, M. J. A. Johnson and S. T. Nguyen, Chem. Sci., 2013, 4, 2483 DOI: 10.1039/C3SC22268C

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