New tetrakis(4-aminophenyl)ethenes: synthesis and electrochemical investigations

Four novel functional conjugated tetraarylamines containing a tetraphenylenecore were synthesized via Ni-catalyzed aryl amination followed by McMurry olefination. Their electrochemical properties were studied by cyclic voltammetry, coulometry, and electrolysis monitored by UV-vis spectroscopy, and discussed with regard to those of the known tetrakis(dimethylaminophenyl)ethane.

Four new tetrakis(4-aminophenyl)ethenes have been prepared and characterized by cyclic voltammetry, coulometry, electrolysis, UV-vis absorption, and EPR spectroscopy. The stability of (radical cation)s generated by oxidation depends on the substitution of the NR1R2 group.