Author, as appears in the article.: Bo, C.; Parrot, A.; Bernard, A.; Jacquart, A.; Serapian, S.A.; Derat, E.; Oms, O.; Dolbecq, A.; Proust, A.; Métivier, R.; Mialane, P.; Izzet, G.
Department: Química Física i Inorgànica
URV's Author/s: BO JANÉ, CARLES; Parrot, A.; Bernard, A.; Jacquart, A.; Serapian, S.A.; Derat, E.; Oms, O.; Dolbecq, A.; Proust, A.; Métivier, R.; Mialane, P.; Izzet, G.
Keywords: density functional calculations Fluorescence polyoxometalates
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 Química Chemistry
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1433-7851
Author identifier: ; n/a; n/a; n/a; 0000-0003-0122-8499; 0000-0002-8637-2707; n/a; n/a; n/a; n/a; n/a; n/a
Record's date: 2017-04-21
Last page: 4876
Journal volume: 56
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
First page: 4872
Publication Type: Article Artículo Article
Repositori URV