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

Co II 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...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2020-11, Vol.56 (89), p.13864-13867
Main Authors: Mansoor, Iram F, Wozniak, Derek I, Wu, Yilei, Lipke, Mark C
Format: Article
Language:English
Subjects:
Accessibility
Crystal structure
Crystallography
Electrochromism
NMR
Nuclear magnetic resonance
Single crystals
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Summary:Co II 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. Cobalt was found to mediate strong electronic coupling between two viologen-like redox-active ligands, providing electrochromic properties that are easily tuned by the applied redox potential.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc05627h