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Photochromism and Dual-Color Fluorescence in a Polyoxometalate-Benzospiropyran Molecular Switch

  • Identification data

    Identifier: PC:2719
    Authors:
    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.
    Abstract:
    DOI: 10.1002/anie.201701860 URL: http://onlinelibrary.wiley.com/doi/10.1002/anie.201701860/abstract;jsessionid=8D1A538D9CDCC1566CFFF80112CBB346.f03t02 Filiació URV: SI
  • Others:

    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
    Link to the original source: http://onlinelibrary.wiley.com/doi/10.1002/anie.201701860/abstract
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1002/anie.201701860
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2017
    First page: 4872
    Publication Type: Article Artículo Article
  • Keywords:

    Polioxometal·lats
    Fisicoquímica
    Fluorescència
    density functional calculations
    Fluorescence
    polyoxometalates
    Química
    Química
    Chemistry
    1433-7851
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