Autor según el artículo: Parrot, Arnaud; Bernard, Aurelie; Jacquart, Aurelie; Serapian, Stefano Artin; Bo, Carles; Derat, Etienne; Oms, Olivier; Dolbecq, Anne; Proust, Anna; Metivier, Remi; Mialane, Pierre; Izzet, Guillaume;
Departamento: Química Física i Inorgànica
Autor/es de la URV: Bo Jané, Carles
Palabras clave: Ultrafast dynamics Strategy Spiropyran Pseudopotentials Polyoxometalates Photochromism Molecular photoswitches Fluorescence Diarylethenes Design Density functional calculations Chemistry photochromism molecular photoswitches fluorescence density functional calculations
Resumen: The photophysical properties of a Keggin-type polyoxometalate (POM) covalently bounded to a benzospiropyran (BSPR) unit have been investigated. These studies reveal that both closed and open forms are emissive with distinct spectral features (¿em (closed form)=530 nm, ¿em (open form)=670 nm) and that the fluorescence of the BSPR unit of the hybrid is considerably enhanced compared to BSPR parent compounds. While the fluorescence excitation energy of the BSPR reference compounds (370 nm) is close to the intense absorption responsible of the photochromic character (350 nm), the fluorescence excitation of the hybrid is shifted to lower energy (400 nm), improving the population of the emissive state. Combined NOESY NMR and theoretical calculations of the closed form of the hybrid give an intimate understanding of the conformation adopted by the hybrid and show that the nitroaryl moieties of the BSPR is folded toward the POM, which should affect the electronic properties of the BSPR.
Áreas temáticas: Química Medicina ii Medicina i Materiais Interdisciplinar General medicine General chemistry Farmacia Engenharias ii Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Catalysis Astronomia / física
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: carles.bo@urv.cat
Identificador del autor: 0000-0001-9581-2922
Fecha de alta del registro: 2024-09-07
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
Enlace a la fuente original: https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201701860
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Angewandte Chemie (International Ed. Print). 56 (17): 4872-4876
Referencia de l'ítem segons les normes APA: Parrot, Arnaud; Bernard, Aurelie; Jacquart, Aurelie; Serapian, Stefano Artin; Bo, Carles; Derat, Etienne; Oms, Olivier; Dolbecq, Anne; Proust, Anna; M (2017). Photochromism and Dual-Color Fluorescence in a Polyoxometalate-Benzospiropyran Molecular Switch. Angewandte Chemie (International Ed. Print), 56(17), 4872-4876. DOI: 10.1002/anie.201701860
DOI del artículo: 10.1002/anie.201701860
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2017
Tipo de publicación: Journal Publications