Controlled Immobilization of a Palladium Complex/Laccase Hybrid into a Macrocellular Siliceous Host

Autor: Fangfang Yang, Pierre Rousselot‐Pailley, Cendrine Nicoletti, A. Jalila Simaan, Bruno Faure, Elise Courvoisier‐Dezord, Agnès Amouric, Yolande Charmasson, Rénal Backov, Thierry Tron, Yasmina Mekmouche
Přispěvatelé: Institut des Sciences Moléculaires de Marseille (ISM2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Yantai University (YTU), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: ChemPlusChem
ChemPlusChem, 2023, 88 (5), pp.e202300156. ⟨10.1002/cplu.202300156⟩
ISSN: 2192-6506
DOI: 10.1002/cplu.202300156⟩
Popis: International audience; 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⊂UNIK 157) or opposite position (1⊂UNIK 71) 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⊂UNIK 157 being twice as active than 1⊂UNIK 71 (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.
Databáze: OpenAIRE
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