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Journal of Thermal Analysis and Calorimetry

, Volume 113, Issue 3, pp 1287–1295 | Cite as

Investigation of thermal stability, spectral, magnetic, and antimicrobial behavior for new complexes of Ni(II), Cu(II), and Zn(II) with a bismacrocyclic ligand

  • Cristina Bucur
  • Romana Cerc Korošec
  • Mihaela Badea
  • Larisa Calu
  • Mariana Carmen Chifiriuc
  • Nicoleta Grecu
  • Nicolae Stanică
  • Dana Marinescu
  • Rodica Olar
Article

Abstract

Novel complexes of type M2LCl4·nH2O (M: Ni, n = 4; M: Cu, n = 2.5 and M: Zn, n = 1.5; L: ligand resulted from 1,3-phenylenediamine, 3,6-diazaoctane-1,8-diamine, and formaldehyde one-pot condensation) were synthesized and characterized. The ligand was also isolated and characterized. The complexes features have been assigned from microanalytical, electrospray ionization tandem mass spectrometry, IR, UV–vis, 1H NMR, and EPR spectra as well as magnetic data at room temperature. Simultaneous thermogravimetric/dynamic scanning calorimetry/evolved gas analysis measurements were performed to evidence the nature of the gaseous products formed in each step. Processes as water elimination, fragmentation, and oxidative degradation of the organic ligand as well as chloride elimination were observed during the thermal decomposition. The final product of decomposition was metal(II) oxide except for copper complex where CuCl remained also in the oxide network. The complexes exhibited an improved antibacterial activity in comparison with the ligand concerning both planktonic as well as biofilm-embedded cells.

Keywords

Complex Bismacrocycle One-pot condensation 1,3-Phenylenediamine Thermal behavior 

Notes

Acknowledgements

Support of the EU (ERDF) and Romanian Government, that allowed the acquisition of the research infrastructure under POS-CCE O 2.2.1 project INFRANANOCHEM—Nr. 19/01.03.2009, is gratefully acknowledged.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • Cristina Bucur
    • 1
  • Romana Cerc Korošec
    • 2
  • Mihaela Badea
    • 1
  • Larisa Calu
    • 1
  • Mariana Carmen Chifiriuc
    • 3
  • Nicoleta Grecu
    • 4
  • Nicolae Stanică
    • 5
  • Dana Marinescu
    • 1
  • Rodica Olar
    • 1
  1. 1.Department of Inorganic Chemistry, Faculty of ChemistryUniversity of BucharestBucharestRomania
  2. 2.Department of Inorganic Chemistry, Faculty of Chemistry and Chemical TechnologyUniversity of LjubljanaLjubljanaSlovenia
  3. 3.Department of Microbiology, Faculty of BiologyUniversity of BucharestBucharestRomania
  4. 4.National Institute of Materials PhysicsMăgurele-IlfovRomania
  5. 5.Romanian Academy, “Ilie Murgulescu” Physical Chemistry InstituteBucharestRomania

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