Engineering photocatalytic porous organic materials for directing redox versus energy transfer processes
Two organic materials containing phenanthroline and triazine fragments, but connected in different ways, are presented. The imine-based material Phen–Tz–covalent organic framework (COF) preferentially shows photocatalytic activity through an energy transfer pathway as observed for olefin photoisomer...
| Autores: | , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/709576 |
| Acesso em linha: | http://hdl.handle.net/10486/709576 https://dx.doi.org/10.1002/solr.202300768 |
| Access Level: | acceso abierto |
| Palavra-chave: | Covalent Organic Frameworks Covalent Triazine Frameworks Energy Transfer Photocatalysis Photoredox Química |
| Resumo: | Two organic materials containing phenanthroline and triazine fragments, but connected in different ways, are presented. The imine-based material Phen–Tz–covalent organic framework (COF) preferentially shows photocatalytic activity through an energy transfer pathway as observed for olefin photoisomerization. However, an analogous covalent triazine framework (Phen–CTF) behaves as a powerful photoredox catalyst able to activate C-X (X=Br, Cl) bonds. The analysis of this phenomenon by means of theoretical calculations enables the rationalization of the different photocatalytic behavior observed. Phen–CTF behaves as a donor–acceptor material resulting in efficient charge separation upon excitation, while the imine groups present in Phen–Tz–COF hamper charge separation contributing to the rapid recombination between electrons and holes. This justifies a better activation via electron transfer in Phen–CTF and via energy transfer in Phen–Tz–COF |
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