4,4′-Dihydroxy-2,2′-bipyridine complexes of Co(III), Cu(II) and Zn(II); structural and spectroscopic characterization

Four new Co(III), Cu(II) and Zn(II) complexes of 4,4′-dihydroxy-2,2′-bipy have been characterized by X-ray crystallography, spectroscopic and electrochemical methods. [Display omitted] New Co(III), Cu(II) and Zn(II) complexes of 4,4′-dihydroxy-2,2′-bipyridine (dhbpyH2) have been structurally charact...

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Bibliographic Details
Published in:Polyhedron 2018-08, Vol.150, p.61-68
Main Authors: Rodríguez-Santiago, Alan J., Cortés, Nicole, Pham, Khoa, Miksovska, Jaroslava, Raptis, Raphael G.
Format: Article
Language:English
Subjects:
Bipyridine ligand
Electrochemistry
Luminescence
Mononuclear complexes
X-ray crystallography
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Summary:Four new Co(III), Cu(II) and Zn(II) complexes of 4,4′-dihydroxy-2,2′-bipy have been characterized by X-ray crystallography, spectroscopic and electrochemical methods. [Display omitted] New Co(III), Cu(II) and Zn(II) complexes of 4,4′-dihydroxy-2,2′-bipyridine (dhbpyH2) have been structurally characterized by single crystal X-ray diffraction methods and studied by electrochemical and spectroscopic techniques. Both bis- and tris-dhbpyH2 zinc complexes were characterized in solution and solid state. A rare case of accidental isochronism of the H5 and H6 protons was identified in the 1H NMR spectrum of the Co(III) complex. The cobalt and copper complexes show reversible one-electron electrochemical reductions. Luminescent emission with a life time t = 4.95 ns was recorded for [Zn(dhbpyH2)2]2+ upon UV irradiation.
ISSN:0277-5387
DOI:10.1016/j.poly.2018.04.039