1. Preparation of a ruthenium complex covalently bonded to multilayer graphene and its evaluation as a photocatalyst
- Author
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Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Navlani-García, Miriam, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, Sansano, Jose M., Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Universidad de Alicante. Instituto Universitario de Materiales, Rodríguez-Flórez, Lesly V., Retamosa, Maria de Gracia, Navlani-García, Miriam, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, and Sansano, Jose M.
- Abstract
Multilayer graphene (MLG), obtained by mild sonication of graphite in NMP, was functionalised via 1,3-dipolar cycloaddition with azomethine ylides generated by thermal 1,2-prototropy from various imino esters. The microwave-assisted functionalisation took place in five hours at 100 °C. The resulting MLG, containing substituted proline-based amine functional groups, was characterized using XPS and showed a nitrogen loading three times that obtained for the same transformation performed for five days using convection-assisted heating. The preparation of the imino ester containing a bipyridine unit at the arylidene position allowed for the preparation of the corresponding functionalised MLG, which incorporated the ruthenium atom to achieve a heterogeneous MLG-Ru complex. This supported complex was tested, as a proof of concept, as a photocatalyst of the aerobic oxidative hydroxylation of 4-methoxyphenylboronic acid.
- Published
- 2024