Synthesis, characterization, and redox potential properties of a new double-stranded Ni-bis(hydrazone)-based helicate

• Published in: Journal of solid state chemistry 2020-12, Vol.292, p.121692, Article 121692
• Main Authors: Villada, Juan D., Carmona-Vargas, Christian C., Ellena, Javier, Ayala, Alejandro P., Ramirez-Pradilla, Juan S., Combariza, Marianny Y., Galarza, Esperanza, D’Vries, Richard F., Chaur, Manuel N.
• Format: Article
• Language: English
• Subjects: Bis(hydrazones); Catalyzed hydrogen reduction; Nickel helicates; Supramolecular chemistry
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2020.121692

Herein we report the synthesis and structural characterization of a new Ni-bis(hydrazone) complex with the chemical formula [Ni2(L)2(Cl)2](Cl)2·2H2O (L ​= ​2-(heptylthio)-4,6-bis(2-((E)-pyridin-2-ylmethylene)hydrazineyl)pyrimidine). Suitable crystals for X-ray diffraction showed the supramolecular interactions of this complex to exhibit a helical structure coordinating two Ni2+ metal ions bounded by two 2-(heptylthio)-4,6-bis(2-((E)-pyridin-2-ylmethylene)hydrazineyl)pyrimidine ligands. In addition, exploitation of the electrochemical properties by cyclic voltammetry, for this helicate, showed catalyzing ability for the reduction of H+ to H2. A new helicate-like compound with formula [Ni2(bis(hydrazone))2(Cl)2](Cl)2•2H2O was obtained. Cyclic voltammetry experiments were carried out to test the potential ability for catalyzing the reduction of H+ to H2. [Display omitted]