New polyurethanes with benzo[k]fluoranthene moieties

Abstract

New polyurethanes bearing benzo[k]fluoranthene moieties in the main chain were synthesized by the reaction of 7,12-bis(2-hydroxyethyl)benzo[k]fluoranthate with hexamethylene-, isophorone-, or toluylene-2,4-diisocyanates. The reaction was carried out without a catalyst in the presence of triethylamine or pyridine; chloroform or the mixtures of DMAA with chloroform or dioxane were used as solvents. The resulting polyurethanes exhibit high fluorescent activity and can be used as photoactive tracers.