Issue 22, 2013

Merging catalysis and supramolecular aggregation features of triptycene based Zn(salphen)s

Abstract

A series of trinuclear, triptycene-based metallosalphen complexes (M = Zn, Ni) have been prepared incorporating various peripheral substituents. The introduction of Zn metal centres into these triptycene based salphen ligands gives rise to cross-linking between different triptycene molecules through μ-phenoxo bridges between the Zn metal centres, and variation in the peripheral groups allows the control of the self-assembling properties as shown by UV-Vis titration data. The strong association of these trinuclear Zn3 complexes under relatively apolar conditions has been exploited to recover the complex after its application as a catalyst in the cycloaddition of carbon dioxide to 1,2-epoxyhexane. The catalysis results and recycling studies show that the co-catalyst structure is important for efficient recovery of the binary system, demonstrating that reversible supramolecular aggregation may become a useful tool for recycling homogeneous catalysts.

Graphical abstract: Merging catalysis and supramolecular aggregation features of triptycene based Zn(salphen)s

Supplementary files

Article information

Article type
Paper
Submitted
08 Jan 2013
Accepted
08 Feb 2013
First published
11 Feb 2013

Dalton Trans., 2013,42, 7962-7970

Merging catalysis and supramolecular aggregation features of triptycene based Zn(salphen)s

D. Anselmo, G. Salassa, E. C. Escudero-Adán, E. Martin and A. W. Kleij, Dalton Trans., 2013, 42, 7962 DOI: 10.1039/C3DT00067B

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