Abstract
Two unsymmetrical complexes, [NiL1]ClO4 (1) and [NiL2]ClO4 (2) have been synthesized and characterized by IR, UV, ES-MS and single crystal X-ray diffraction, where HL1 and HL2 are, respectively, the [1+1] condensation products of 2,6-diformyl-4-X-phenol (X = F or CH3) with N 1-(2-aminoethyl)-N 2-(4-nitrobenzyl) ethane-1,2-diamine. The coordination geometry of the metal in both complexes can be approximately described as square planar with a mean plane deviation of 0.032 Å in complex 1 and 0.027 Å in complex 2, respectively. The binding activities of the complexes toward calf-thymus DNA have been analyzed by spectroscopy and viscosity methods. The binding constants of 1 and 2 obtained from UV spectroscopic studies are 5.43 × 105 and 1.83 × 105 M−1, respectively, while the linear Stern–Volmer quenching constants obtained from fluorescence spectroscopic studies are 0.83 × 103 and 0.71 × 103 M−1, respectively. The cyclic voltammograms of the complexes show a pseudo-reversible electrochemical process.
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We acknowledge financial support from the Natural Science Foundation of China (21171135 and 20971102) and China Hubei Provincial Science & Technology Department (2011BFA020).
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Wang, Y., Mao, JW., Ding, C. et al. Crystal structures, cyclic voltammetry and DNA binding of two mononuclear nickel(II) complexes. Transition Met Chem 39, 111–118 (2014). https://doi.org/10.1007/s11243-013-9779-4
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DOI: https://doi.org/10.1007/s11243-013-9779-4