Quinoline-containing -conjugated systems: synthesis, investigation and application of quinophthalone dyes (review)

Abstract

Here we present the literary review concerning the methods of synthesis and application fields of substituted quinophthalonesan interesting class of heterocyclic compounds, which structures include fragments of the substi- tuted / nonsubstituted quinolines and phthalic anhydride. Such compounds are characterized by an extended π- conjugated system and therefore are most often used as dyes.