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Projecte llegit

Títol: Caracterización estructural de quelados de ácido cítrico con cationes divalentes

Estudiant que ha llegit aquest projecte:

Tutor/a o Cotutor/a: SEPULCRE SANCHEZ, FRANCISCO LUIS

Departament: DEAB

Títol: Caracterización estructural de quelados de ácido cítrico con cationes divalentes

Data inici oferta: 03-02-2020      Data finalització oferta: 03-10-2020

Estudis d'assignació del projecte:

    Lloc de realització:
    EEABB

    Segon tutor/a (UPC): PUJOLA CUNILL, MONTSERRAT

    Paraules clau:
    Quelados, Cristalización, Hierro, Cobre, Zinc, Caracterización

    Descripció del contingut i pla d'activitats:
    Síntesis de quelados de ácido cítrico con diferentes cationes divalentes de interés fisiológico. Estudio de la coordinación de estos complejos, mediante espectroscopía infrarojo y difracción de rayos X

    Overview (resum en anglès):
    The objective of this study has been the characterization of citric acid chelates with divalent cations (iron, copper, and zinc) by FTIR and XRD testing, melting point and macroscopic observations to support with this the molecular structure that these chelates form. To achieve this, the chelation has been crystallized by the precipitation process, changing the pH and molar ratio variables in the case of the iron cation, resulting in their non-crystallization at a pH greater than 3.15 (first pK of citric acid ) and neither the crystallization of citric acid chelates with zinc using zinc chloride as cation donator. After the characterization of the crystals obtained, and supported by FTIR and XRD spectra, it is concluded that in the case of iron chelation, multiple geometries have been formed in the same sample, leaving evident the lack of characterization at pH above pK. In the case of copper, the differences in the FTIR and XRD spectra, and adding the macroscopic characterization of the crystals, allow to affirm that a chelation of citric acid to copper has been achieved, even so, the multiple planes of refraction obtained by XRD do not elucidate the molecular interactions between copper and the carboxyl groups of citric acid.

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