Development of structural characterization and physicochemical behaviour of triphenylamine blocks

A novel multitriphenylamine substituted derivatives, possessing the respective photochromic groups were synthesized by Stille cross-coupling methodology. The hyperbranched structures have been characterized by 1H NMR, 13C NMR. Obtained structures show good stability in common organic solvents such as CHCl3, toluene and CH2Cl2 and exhibit excellent thermal stability. Electrochemical results and theoretical calculation suggest that oxidation and reduction start from the side of amine and branching five member heterocycle ring moieties, respectively.