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Molecular Engineering of Trifunctional Supported Catalysts for the Aerobic Oxidation of Alcohols
Author(s) -
Fernandes Antony E.,
Riant Olivier,
Jensen Klavs F.,
Jonas Alain M.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201603673
Subject(s) - catalysis , alcohol oxidation , imidazole , benzyl alcohol , chemistry , heterogeneous catalysis , homogeneous , alcohol , azide , homogeneous catalysis , combinatorial chemistry , organic chemistry , chemical engineering , physics , engineering , thermodynamics
We describe a simple and general method for the preparation and molecular engineering of supported trifunctional catalysts and their application in the representative Cu/TEMPO/NMI‐catalyzed aerobic oxidation of benzyl alcohol. The methodology allows in one single step to immobilize, with precise control of surface composition, both pyta, Cu I , TEMPO, and NMI sites on azide‐functionalized silica particles. To optimize the performance of the heterogeneous trifunctional catalysts, synergistic interactions are finely engineered through modulating the degree of freedom of the imidazole site as well as tuning the relative surface composition, leading to catalysts with an activity significantly superior to the corresponding homogeneous catalytic system.