Mass-spectrometric investigation of the coordination compounds of oxovanadium(IV), cobalt(II), nickel(II), copper(II), and zinc(II) with ligands based ON S-substituted isothiosemicarbazides, salicyaldehyde, and 3-formylacetylacetone

Cobalt(II)/(III) complexes bearing a tetradentate thiosemicarbazone: Synthesis, experimental and theoretical characterization, and electrochemical and antioxidant properties

“…There are many reports on cobalt complexes with a salen ligand, but studies on those with N 2 O 2thiosemicarbazone are few. [9,10] Moreover, experimental studies on cobalt-salen complexes demonstrating cobaltbased electron transfer reactions are very limited. [7,8] Although thiosemicarbazones and metal complexes are known for their various biological activities, some have also been investigated for their biosensor and optical material properties.…”

“…In 1987 and 1989, cobalt(II) complexes of N 2 O 2chelating S-alkylthiosemicarbazones were obtained using salicylaldehyde derivatives. [9,10] However, cobalt complexes of the thiosemicarbazones with a salen-like but asymmetric N 2 O 2 donor set have not been studied for the above-mentioned applications. Here, we synthesized four-and six-coordinated cobalt complexes bearing tetradentate thiosemicarbazone ligands to determine their basic properties for bio-and optic-sensor applications and also demonstrated the relationship between antioxidant capacity and redox properties ( Figure 1).…”

“…There are many reports on cobalt complexes with a salen ligand, but studies on those with N 2 O 2 ‐thiosemicarbazone are few. [ 9,10 ] Moreover, experimental studies on cobalt–salen complexes demonstrating cobalt‐based electron transfer reactions are very limited. [ 7,8 ]…”