Articles producció científica> Química Física i Inorgànica

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

  • Dades identificatives

    Identificador: imarina:5130943
    Autors:
    Parrot, ArnaudBernard, AurelieJacquart, AurelieSerapian, Stefano ArtinBo, CarlesDerat, EtienneOms, OlivierDolbecq, AnneProust, AnnaMetivier, RemiMialane, PierreIzzet, Guillaume
    Resum:
    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.
  • Altres:

    Autor segons l'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;
    Departament: Química Física i Inorgànica
    Autor/s de la URV: Bo Jané, Carles
    Paraules clau: Ultrafast dynamics Strategy Spiropyran Pseudopotentials Polyoxometalates Photochromism Molecular photoswitches Fluorescence Diarylethenes Design Density functional calculations Chemistry photochromism molecular photoswitches fluorescence density functional calculations
    Resum: 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.
    Àrees temàtiques: 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
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: carles.bo@urv.cat
    Identificador de l'autor: 0000-0001-9581-2922
    Data d'alta del registre: 2024-09-07
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201701860
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Angewandte Chemie (International Ed. Print). 56 (17): 4872-4876
    Referència 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 de l'article: 10.1002/anie.201701860
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2017
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry,Chemistry (Miscellaneous),Chemistry, Multidisciplinary
    Ultrafast dynamics
    Strategy
    Spiropyran
    Pseudopotentials
    Polyoxometalates
    Photochromism
    Molecular photoswitches
    Fluorescence
    Diarylethenes
    Design
    Density functional calculations
    Chemistry
    photochromism
    molecular photoswitches
    fluorescence
    density functional calculations
    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
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