Synthesis, characterization, and redox potential properties of a new double-stranded Ni-bis(hydrazone)-based helicate - Villada, Juan D.; Carmona-Vargas, Christian C.; Ellena, Javier; Ayala, Alejandro Pedro; Ramirez-Pradilla, Juan S.; Combariza, Marianny Y.; Galarza, Esperanza; D'Vries, Richard F.; Chaur, Manuel N. (Journal of Solid State Chemistry, 2020)