THIENYL TRIARYLAMINES - REACTIVITY AND SPECTRA OF CATION RADICALS ANDDICATIONS

The alpha-thienyl substituted triarylamines, bis(4-bromophenyl)-4-(2-t hienyl)-phenylamine (1), (4-bromophenyl)bis-[4-(2-thienyl)phenyl]amine (2) and tris[4-(2-thienyl)phenyl]amine (3) were prepared as novel mol ecular systems for photoelectrical conversion. Electrochemical oxidati ons using solvents like hexafluoroisopropanol were performed to evalua te the stability of the corresponding cation radicals. The dimer [4-di (4-bromophenyl)amino]phenyl}-2,2'-bithiophene (1D) was prepared by an electrochemical oxidation-reduction sequence. Chemical and electrochem ical oxidations of 1D were studied and UV-VIS-NIR spectra of the neutr al, cation radical and dication are reported.