NIR absorption of perylene dyes and fluorescence with large stokes’ shift by simple deprotonation was written by Langhals, Heinz;Rauscher, Maximilian. And the article was included in Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences in 2013.Computed Properties of C50H62N2O4 This article mentions the following:
A brightly red fluorescent 1-hydroxyperylene bisimide was prepared by a nucleophilic aromatic displacement reaction. The deprotonation of the hydroxy group shifts the absorption and the strong fluorescence into the NIR. A selected medium promotes an ESPT mechanism and induces a large Stokes’ shift of nearly 200 nm in the NIR. In the experiment, the researchers used many compounds, for example, 2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6Computed Properties of C50H62N2O4).
2,9-Di(tridecan-7-yl)anthra[2,1,9-def:6,5,10-d’e’f’]diisoquinoline-1,3,8,10(2H,9H)-tetraone (cas: 110590-84-6) belongs to isoquinoline derivatives. Quinoline is a mancude organic heterobicyclic parent, an azaarene, an ortho-fused heteroarene and a member of isoquinolines. Isoquinoline-type alkaloids show biological activities similar to those of morphinane-, protoberberine-, and benzophenanthridine-type alkaloids.Computed Properties of C50H62N2O4
Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem