Affiliations: Institute of Applied Chemistry, Riga Technical University, Riga, Latvia
Note: [] Corresponding author: Lauma Laipniece, Institute of Applied Chemistry, Riga Technical University, Paula Valdena street 3, LV-1048, Riga, Latvia. Tel.: +371 28771841; E-mail: [email protected]
Abstract: 4′-[N-(2-Hydroxyethyl)-N-methylamino]-2-(2-hydroxyethoxy)-4-nitroaz obenzene (1) has been synthesized in azo coupling reaction. Nine different analogues of 1 has been prepared symmetrically and alternately substituted with dendritic phenyl and perfluorophenyl moieties using standard methods for ester and ether bond formation and azo coupling reaction. Thermal and light absorption properties of the azochromophores have been examined. The effect of trityl, tetrahydropyranyl, hydroxyl, pentafluorophenyloxy and 2,3,4,5,6-pentafluorobenzyl propionate moieties on glass transition, melting point and thermal stability has been proposed.
