Articles producció científica> Enginyeria Química

Bio-nanohybrid catalysts based on l-leucine immobilized in hydrotalcite and their activity in aldol reaction

  • Identification data

    Identifier: PC:1464
    Handle: https://hdl.handle.net/20.500.11797/PC1464
    Authors:
    Dana-Georgiana CrivoiRonald-Alexander MirandaElisabetta FinocchioJordi LlorcaGianguido RamisJesús E. SueirasAnna M. SegarraFrancisco Medina
    Abstract:
    Nanohybrid materials based on l-leucine (l-Leu) and hydrotalcites (HT) were prepared by the ion-exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized l-Leu are affected not only by the time of synthesis, but also by temperature and ultrasound treatment. The XRD results demonstrate that the immobilization occurs in either a vertical or oblique orientation with respect to the HT layers. The catalytic activity of these materials was tested in the aldol addition reaction of cyclohexanone with different aromatic aldehydes, affording mainly the syn-diastereomer. Furthermore, the present study demonstrates that both diastereo- and enantioselectivity can be easily modulated by the appropriate combination of nanohybrid catalyst, solvent and reaction time.

  • Others:

    Author, as appears in the article.: Dana-Georgiana Crivoi; Ronald-Alexander Miranda; Elisabetta Finocchio; Jordi Llorca; Gianguido Ramis; Jesús E. Sueiras; Anna M. Segarra; Francisco Medina
    Department: Enginyeria Química
    URV's Author/s: CRIVOI ., DANA GEORGIANA; MIRANDA ACEVEDO, RONALD ALEXANDER; Elisabetta Finocchio; Jordi Llorca; Gianguido Ramis; SUEIRAS ROMERO, JESÚS EDUARDO; SEGARRA GONZALEZ, ANNA MARIA; MEDINA CABELLO, FRANCISCO
    Keywords: Nanohybrid materials l-Leucine Hydrotalcite
    Abstract: Nanohybrid materials based on l-leucine (l-Leu) and hydrotalcites (HT) were prepared by the ion-exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized l-Leu are affected not only by the time of synthesis, but also by temperature and ultrasound treatment. The XRD results demonstrate that the immobilization occurs in either a vertical or oblique orientation with respect to the HT layers. The catalytic activity of these materials was tested in the aldol addition reaction of cyclohexanone with different aromatic aldehydes, affording mainly the syn-diastereomer. Furthermore, the present study demonstrates that both diastereo- and enantioselectivity can be easily modulated by the appropriate combination of nanohybrid catalyst, solvent and reaction time.
    Research group: Catàlisi heterogènia
    Thematic Areas: Chemical engineering Ingeniería química Enginyeria química
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0926-860X
    Author identifier: n/a; n/a; n/a; 0000-0002-7447-9582; 0000-0001-8510-4842; 0000-0002-4059-0506; 0000-0002-9550-541X; n/a
    Record's date: 2016-05-02
    Last page: 129
    Journal volume: 519
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0926860X16301405?via%3Dihub
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1016/j.apcata.2016.03.018
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2016
    First page: 116
    Publication Type: Article Artículo Article

  • Keywords:

    Catàlisi
    Materials nanoestructurats
    Nanohybrid materials
    l-Leucine
    Hydrotalcite
    Chemical engineering
    Ingeniería química
    Enginyeria química
    0926-860X

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