The derivatives of 2,4,6-triphenyl-1,3,5-triazine containing fluorene, carbazole and phenothiazine moieties were investigated electrochemically. The comparative study of electrochemical and optical properties of the compounds was performed with the attempt to establish a correlation between their properties and p-electron conjugation lengths. Basic electronic parameters were estimated and electrochromic windows from three polymeric derivatives were formed. Electrochromic parameters, optical density (DOD) and coloration efficiency (CE) were determined. (C) 2016 Elsevier Ltd. All rights reserved.