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- Title
Controlled Immobilization of a Palladium Complex/Laccase Hybrid into a Macrocellular Siliceous Host.
- Authors
Yang, Fangfang; Rousselot‐Pailley, Pierre; Nicoletti, Cendrine; Simaan, A. Jalila; Faure, Bruno; Courvoisier‐Dezord, Elise; Amouric, Agnès; Charmasson, Yolande; Backov, Rénal; Tron, Thierry; Mekmouche, Yasmina
- Abstract
This study investigates the site‐directed immobilization of a hybrid catalyst bearing a biquinoline‐based‐Pd(II) complex (1) and a robust laccase within cavities of a silica foam to favor veratryl alcohol oxidation. We performed the grafting of 1 at a unique surface located lysine of two laccase variants, either at closed (1⊂UNIK157) or opposite position (1⊂UNIK71) of the enzyme oxidation site. After immobilization into the cavities of silica monoliths bearing hierarchical porosity, we show that catalytic activity is dependent on the orientation and loading of each hybrid, 1⊂UNIK157 being twice as active than 1⊂UNIK71 (203 TON vs 100 TON) when operating under continuous flow. These systems can be reused 5 times, with an operational activity remaining as high as 40 %. We show that the synergy between 1 and laccase can be tuned within the foam. This work is a proof of concept for controlling the organization of a heterogeneous hybrid catalyst using a Pd/laccase/silica foam.
- Subjects
PALLADIUM compounds; CATALYTIC activity; HETEROGENEOUS catalysts; LACCASE; PROOF of concept; ALCOHOL oxidation; CATALYSTS
- Publication
ChemPlusChem, 2023, Vol 88, Issue 5, p1
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.202300156