Synthesis of oligoetherols with a carbazole ring and an azo group
Polimery 2011, No 2, 146
Diols with a carbazole ring were obtained in reactions of 9-(2,3-epoxypropyl)carbazole with water or ethylene glycol or in a reaction of 9-(2-chloroethyl)carbazole with diethanolamine. Then, the diols were further converted in a reaction with excess of ethylene or propylene oxide (EO and PO, respectively) to obtain oligoetherols. The oligoetherols were derivatized into azo compounds by reactions with 2-chloro-4-nitrophenylamine.The compounds were isolated and characterized by elemental analysis, number-average molecular weight (Mn), hydroxyl number (LOH), IR, UV-Vis and 1H NMR spectroscopy. It has been found that the products have enhanced thermal stability in comparison with oligomers obtained from diols containing carbazole ring without azo group.