Di- and tetranuclear gadolinium (III) complexes of 2-hydroxypropane-1,2,3-tricarboxylic acid and 1,2,2-trimethylcyclopentane-1,3-dicarboxylic acid : identification and characterization


  • Mohammed Riri Hassan II University http://orcid.org/0000-0003-3218-8362
  • Farid Hadhoudi Hassan II university
  • Mustapha Hor Hassan II university
  • Samir Ezzemouri Hassan II university
  • Tarik Eljaddi Université de Rouen
  • Adelkhalek Benajjar High Engineering School of Information,Management and Civil Engineering
  • Miloudi Hlaibi Hassan II university and Université de Rouen




Citric and Camphoric Acid, Coloress Complexes, Indirect Photometry Detection, Gadolinium Complexes, Stability of Contrast Agents.


Our studying involved, Identification and characterization of two novel gadolinium complexes with 2-hydroxypropane-1,2,3-tricarboxylic acid (citric acid) noted H3L and 1,2,2-trimethylcyclopentane-1, 3-dicarboxylic acid (camphoric acid) noted H2L in aqueous solution and in pH range 5,5–7,5. These acids containing the donor atoms (oxygen of OH and COOH), the formatted complexes are colorless and have no absorption band UV–visible. So, to determine the composition and stabilities of these complexes in solution, we have used an analytical technique called «Indirect Photometry Detection (IPD) » have identified multi-nuclear and multi-dentate complexes studied in this work. Giving for these colorless complexes with a mole ratio (M:L): (4:2) for Gd (III)–Citric acid and (2:2) Gd (III)–Camphoric acid. In addition, we have shown that the compositions and stabilities constant of these complexes are depended on the acidity of the medium.

Author Biography

Mohammed Riri, Hassan II University

Laboratory of Material - Material Interaction and Processes Membrane (I3MP), Departement of chemistry, Faculty of Sciences Hassan II University, Ain Chock, BP 5366, Maârif, Casablanca, Morocco


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