Novel Compounds with a Viologen Skeleton and N‐Heterocycles on the Peripheries: Electrochemical and Spectroscopic Properties

The present article deals with novel compounds comprising a redox-active group as core and a nucleobase in the peripheries, linked covalently via a spacer. The new derivatives 1,1′,1″-(benzene-1,3,5-triyltrimethanediyl)tris{1′-[3-(3,4-dihydro-5-methyl-2,4-dioxopyrimidin-1(2H)-yl)propyl]-4,4′-bipyridinium} hexafluorophosphate (1), 1,1′,1″-(benzene-1,3,5-triyltrimethanediyl)tris{1′-[2-(4-chloro-7H-pyrrolo[2,3-d]pyrimidine-7-yl)ethyl]-4,4′-bipyridinium} hexachloride (2a)1 , and 1,1′,1″-(benzene-1,3,5-triyltrimethanediyl)tris{1′-[2-(2-amino-4-chloro-7H-pyrrolo[2,3-d]pyrimidine-7-yl)ethyl]-4,4′-bipyridinium} hexabromide (2b)1) were synthesized by nucleobase-anion alkylation and linked to the 4,4′-bipyridinium core. UV and CV analyses of these compounds were performed and revealed significantly different properties.