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Updated: Nov 9, 2025

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
Chiral Chromium Salen@rGO as Multipurpose and Recyclable Heterogeneous Catalyst
Mariam Abd El Sater1,2, Mohamed Mellah1, Diana Dragoe1
1Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France.
Abstract:
The first immobilization of a pyrene-tagged chromium salen complex through π-π noncovalent interactions on reduced graphene oxide (rGO) is described. A very robust supported catalytic system is obtained to promote asymmetric catalysis in repeated cycles, without loss of activity or enantioselectivity. This specific behavior was demonstrated in two different catalytic reactions (up to ten reuses) promoted by chromium salen complexes, the cyclohexene oxide ring-opening reaction and the hetero-Diels-Alder cycloaddition between various aldehydes and Danishefsky's diene. Furthermore, the chiral chromium salen@rGO has been found to be compatible with a multi-substrate type use, in which the structure of the substrate involved is modified each time the catalyst is reused.
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