A delocalized cobaltoviologen with seven reversibly accessible redox states and highly tunable electrochromic behaviour

This is the authors' abstract. We don't add key points for this paper.

mediates electronic coupling between two N-Me-pyridinium-terpyridine ligands that are related to redox-active N,N-dialkyl-4,4'-bipyridinium dications (viologens). Borderline Class II/III electronic delocalization imparts the cobaltoviologen complex with distinct electronic properties (e.g., 7 accessible redox states) relative to those of viologens, leading to enhanced electrochromism.