Synergetic effect in heterogeneous acid catalysis by a porous ionic crystal based on Al(iii)-salphen and polyoxometalate

Ryosuke Kawahara; Ryota Osuga; Junko N Kondo; Noritaka Mizuno; Sayaka Uchida

doi:10.1039/c6dt04552a

Synergetic effect in heterogeneous acid catalysis by a porous ionic crystal based on Al(iii)-salphen and polyoxometalate

Dalton Trans. 2017 Mar 7;46(10):3105-3109. doi: 10.1039/c6dt04552a.

Authors

Ryosuke Kawahara¹, Ryota Osuga², Junko N Kondo³, Noritaka Mizuno⁴, Sayaka Uchida⁵

Affiliations

¹ Department of Basic Science, School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
² Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259-R1-10 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
³ Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259-R1-10 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan and JST-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
⁴ Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
⁵ Department of Basic Science, School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan and JST-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.

PMID: 28074198
DOI: 10.1039/c6dt04552a

Abstract

A porous ionic crystal is synthesized with a cationic Al(iii)-salphen complex (Al(iii)-salphen) and a α-Keggin-type polyoxometalate (POM). The compound possesses stable three dimensional porous structure and shows high activity as a heterogeneous catalyst in pinacol rearrangement, which is a typical acid reaction. Notably, Al(iii)-salphen, POM, and a physical mixture of the two components are much less active, suggesting a synergetic effect of Al(iii)-salphen and POM in a porous framework.