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Volume 67, Issue 10

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Investigation of 3,5-dichlorosalicylate-copper(II)-(3-pyridylmethanol or N,N′-diethylnicotinamide) complex systems by EPR spectroscopy

Lucia Husáriková
  • Department of Physical Chemistry, Slovak University of Technology, Radlinského 9, SK-812 37, Bratislava, Slovakia
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 / Zuzana Repická
  • Department of Inorganic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, SK-812 37, Bratislava, Slovakia
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 / Dušan Valigura
  • Department of Inorganic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, SK-812 37, Bratislava, Slovakia
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 / Marián Valko
  • Department of Physical Chemistry, Slovak University of Technology, Radlinského 9, SK-812 37, Bratislava, Slovakia
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 / Milan Mazúr
  • Department of Physical Chemistry, Slovak University of Technology, Radlinského 9, SK-812 37, Bratislava, Slovakia
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Published Online: 2013-06-04 | DOI: https://doi.org/10.2478/s11696-013-0390-0

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Abstract

Copper(II) complex systems, containing 3,5-dichlorosalicylic acid (3,5-Cl2salH) and different copper salts (Cu(ac)2 or CuSO4), with varying concentrations of 3-pyridylmethanol (ronicol, ron) or N,N′-diethylnicotinamide (denia) as ligands, were prepared. The effects of Cu(II) salts containing anions of different basicity and two different N-donor ligands with varying ligand-to-metal ratio (x) on the formation of the resultant complexes in the water/methanol solutions were studied by EPR spectroscopy at low temperature of 98 K. When ligand concentration was increased, the resolution and signal intensity of the 14N perpendicular super-hyperfine splitting patterns increased (for ron more progressively), becoming saturated at higher ligand concentrations. In comparing the ronicoland denia-containing systems, both g-factors (g ⊥, g ‖) are systematically higher and the parallel hyperfine splitting (A ‖) systematically lower in denia-containing systems for both Cu(II) salts.

Keywords: 3,5-dichlorosalicylic acid; 3-pyridylmethanol; N,N′-diehylnicotinamide; copper(II) complexes; EPR spectroscopy

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About the article

Published Online: 2013-06-04

Published in Print: 2013-10-01

Citation Information: Chemical Papers, Volume 67, Issue 10, Pages 1330–1344, ISSN (Online) 1336-9075, DOI: https://doi.org/10.2478/s11696-013-0390-0.

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