Predesigned covalent organic frameworks as effective platforms for Pd(II) coordination enabling cross-coupling reactions under sustainable conditions
EntityUAM. Departamento de Química Inorgánica; UAM. Departamento de Química Orgánica
10.1002/adsu.202100409Advanced Sustainable Systems 6.3 (2022): 2100409
ProjectGobierno de España. RTI2018-095038-B-I00; Gobierno de España. PID2019-110637RB-I00; Comunidad de Madrid. S2018/NMT-4367/FotoArt; Comunidad de Madrid. Y2020/NMT-6469/FOTOSURF; info:eu-repo/grantAgreement/EC/H2020/647550
SubjectsCovalent organic frameworks; Catalysis; Phenanthroline; X-ray photoelectron spectroscopy; C-C cross-coupling reactions; Química
Rights© 2021 The Authors
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
The phenanthroline unit in an imine-based covalent organic framework (Phen-COF) offers a robust coordination site for Pd(OAc)2 centers. Coordination of palladium centers is demonstrated by a variety of techniques, including X-ray photoelectron spectroscopy and total X-ray fluorescence. The stable phenanthroline-Pd(II) coordination avoids leaching of metal centers to the reaction medium, where deactivation processes through nanoparticle formation limits the catalytic activities observed for homogeneous systems. Thus, because of isolation and immobilization of catalytic sites in the Pd@Phen-COF the performance of material, the catalytic outputs are dramatically increased with respect to the performance observed for analogous molecular catalysts. This concept is applied in this work to C-C cross-coupling reactions under mild and environmentally benign conditions. The activities found for Suzuki-Miyaura and Mizoroki-Heck reactions allow thousands of turnover numbers in the transformation of a wide scope of precursors with a high degree of recyclability. The results reported in this work contribute to the design of greener protocols for transformations that have a crucial role in the industrial synthesis of high-added value fine chemicals
Google Scholar:López Magano, Alberto - Mas Ballesté, Rubén - Alemán Lara, José Julián
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