Journal of Thermal Analysis and Calorimetry

, Volume 134, Issue 3, pp 1851–1861 | Cite as

Synthesis, thermal, spectral, antimicrobial and cytotoxicity profile of the Schiff bases bearing pyrazolone moiety and their Cu(II) complexes

  • Irina Zarafu
  • Rodica Olar
  • Mariana Carmen Chifiriuc
  • Coralia Bleotu
  • Petre Ioniţă
  • Mihaela Mulţescu
  • Gabriela Ioniţă
  • Graţiela Grădişteanu
  • Arnaud Tatibouët
  • Mihaela BadeaEmail author


A series of Schiff bases resulted in the [1 + 1] condensation of 8-alkyl-2-hydroxy-tricyclo[]-tridecan-13-one with the 4-amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one, and their complexes CuL(CH3COO)2·nH2O were synthesized. The compounds were characterized by microanalytical, ESI–MS, NMR, IR, electronic and EPR spectra. Based on the ESI–MS and IR spectra, a mononuclear structure with both Schiff base and acetate as chelate was proposed for complexes. An elongated rhombic stereochemistry was assigned considering electronic and EPR data. The thermal analyses have evidenced processes as water elimination, acetate decomposition as well as oxidative degradation of the Schiff base moiety. The bioevaluation of compounds in relation to planktonic and biofilm-embedded microbial cells, as well as to human cells, indicates an improved activity of complexes over ligands. The same tendency was observed for antioxidant activity.


4-Aminoantipyrine Copper complex Biofilm Cytotoxicity Schiff base Thermal behaviour 



The authors thank to researcher Drăghici Constantin from Romanian Academy C. D. Neniţescu Organic Chemistry Institute for the help in NMR data interpretation.

Supplementary material

10973_2018_7681_MOESM1_ESM.pdf (914 kb)
Supplementary material 1 (PDF 913 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Irina Zarafu
    • 1
  • Rodica Olar
    • 2
  • Mariana Carmen Chifiriuc
    • 3
    • 4
  • Coralia Bleotu
    • 5
  • Petre Ioniţă
    • 1
  • Mihaela Mulţescu
    • 1
  • Gabriela Ioniţă
    • 6
  • Graţiela Grădişteanu
    • 3
  • Arnaud Tatibouët
    • 7
  • Mihaela Badea
    • 2
    Email author
  1. 1.Department of Organic Chemistry, Faculty of ChemistryUniversity of BucharestBucharestRomania
  2. 2.Department of Inorganic Chemistry, Faculty of ChemistryUniversity of BucharestBucharestRomania
  3. 3.Department of Microbiology, Faculty of BiologyUniversity of BucharestBucharestRomania
  4. 4.The Research Institute of the University of BucharestICUBBucharestRomania
  5. 5.Stefan S Nicolau Institute of VirologyBucharestRomania
  6. 6.Romanian Academy, “Ilie Murgulescu” Physical Chemistry InstituteBucharestRomania
  7. 7.ICOA-UMR7311, CNRSUniversity of OrleansOrléansFrance

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