Dyes derived from 1,4-naphthoquinone as initiators for radical and cationic photopolymerisation

摘要

Several 2-phenylamino-1,4-naphthoquinone-based dyes and two related benzo[2,3-b]-phenazines were synthesised and characterised by proton nuclear magnetic resonance spectroscopy and electron ionisation mass spectrometry. The electrochemical and spectral properties of these compounds were investigated. The synthesised dyes were found to be capable photosensitisers for radical (reducible/oxidisable) and cationic polymerisations, respectively. In radical polymerization, better results in the oxidisable process were achieved.