Journal of Chemical Sciences

, Volume 128, Issue 7, pp 1057–1066 | Cite as

Copper(II) Schiff base complexes and their mixed thin layers with ZnO nanoparticles



Cu(II) complexes with Schiff bases derived from ethylenediamine (en) and 2-pyridinecarboxaldehyde (pyca), 2,5-dimethoxybenzaldehyde (dmbaH) or 4-imidazolecarboxaldehyde (4Him) were obtained and studied by elemental analysis, UV-VIS and IR spectra. Zinc oxide was synthesized using a simple homogeneous precipitation method with zinc acetate as a starting material. Thin layers of the studied Cu(II) complexes were deposited on Si(111) or ZnO/Si(111) substrates by a spin coating method and characterized with a scanning electron microscopy (SEM/EDS), atomic force microscopy (AFM) and fluorescence spectroscopy. For Cu(II) layers the most intensive fluorescence bands due to intra-ligand transitions were observed between 462 and 503 nm. The fluorescence intensity of thin layers was corelated to the rotation speed. In the case of the [Cu(II)(en(4Him)2)Cl2](2a)/ZnO/Si and [Cu(en(dmbaH)2)Cl2](3a)/ZnO/Si layers the quenching of the emission band from ZnO at 440 nm (λ ex = 330 nm) associated with various intrinsic or extrinsic lattice defects was noted.

Graphical Abstract

New copper(II) complexes with Schiff bases obtained from ethylenediamine were structurally and spectroscopically characterized. Thin layers of Cu(II) complexes were deposited on Si(111) or ZnO/Si(111) by a spin coating method. The Cu(II) layers exhibited fluorescence bands between 462 and 503 nm. In the Cu(II)complex/ZnO/Si layers, quenching of the emission band from ZnO at 440 nm (λex=330 nm) was noted.


Thin layer ZnO nanoparticles copper complexes AFM SEM fluorescence 



Authors would like to thank the National Science Centre (NCN), Poland for financial support (grant no. 2013/09/B/ST5/03509).

Supplementary material

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(DOC 2.39 MB)


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Copyright information

© Indian Academy of Sciences 2016

Authors and Affiliations

    • 1
    • 1
    • 1
  1. 1.Faculty of ChemistryNicolaus Copernicus University in TorunTorunPoland

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