Synthesis and evaluation of fluorescent materials for colour control of peroxyoxalate chemiluminescence. III. Yellow and red fluorescent emitters

Abstract

A number of bis(phenylethynyl)-substituted anthracenes and naphthacenes have been synthesized and their suitability as fluorescent additives for peroxyoxalate chemiluminescence evaluated. Fluorescence and chemiluminescence emission data for all compounds are presented. Both 2-chloro- and 6-chloro-5,12-bis(phenylethynyl)naphthacene provide effective scarlet chemiluminescence with the peroxyoxalate system (λ_max 609 and 614 nm respectively). Although solutions of both compounds decolorize slowly in the presence of air and light, when used in concentrations of 1-5 × 10^-3M they allow efficient chemiluminescence for greater than 5 h.