Synthesis of hyperbranched poly(aryl amine)s via a carbene insertion approach

摘要: A novel diazirine functionalised aniline derivative, 3-(3-aminophenyl)-3-methyldiazirine 1, was prepared and employed as an AB2-type monomer in the synthesis of hyperbranched polymers; thus providing first instance which polyamines have been viacarbene insertion polymerisation. Photolysis 1 bulk solution resulted formation poly(aryl amine)s with degrees polymerisation (DP) varying from 9 to 26 determined by gel permeation chromatography (GPC). In solution, increase initial concentration generally found result a decrease molecular weight characteristics resulting amine)s. Subsequent thermal treatment caused further DP values up maximum 31. Nuclear magnetic resonance (NMR) spectroscopic analysis revealed that upon hydroamination styrenic species formed photopolymerisation or activation moieties.