Author, as appears in the article.: 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;
Department: Química Física i Inorgànica
URV's Author/s: Bo Jané, Carles
Keywords: Ultrafast dynamics Strategy Spiropyran Pseudopotentials Polyoxometalates Photochromism Molecular photoswitches Fluorescence Diarylethenes Design Density functional calculations Chemistry photochromism molecular photoswitches fluorescence density functional calculations
Abstract: 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.
Thematic Areas: 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
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: carles.bo@urv.cat
Author identifier: 0000-0001-9581-2922
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Angewandte Chemie (International Ed. Print). 56 (17): 4872-4876
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
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
Publication Type: Journal Publications
Repositori URV