Red-Light-Emitting System Based on Aggregation of Donor-Acceptor Derivatives in Polar Aqueous Media was written by Ishi-i, Tsutomu;Ikeda, Kei;Kichise, Yuki;Ogawa, Michiaki. And the article was included in Chemistry – An Asian Journal in 2012.Reference of 148231-12-3 This article mentions the following:
The authors have demonstrated that an efficient red-light-emitting system can be created in polar water media based on the aggregation of donor-acceptor dyes triphenylamine benzothiadiazole, triphenylamine benzoselenodiazole, and triphenylamine quinoxaline aggregates. The UV/Vis absorption and fluorescence spectra of the dyes were measured in a THF/water mixture, in which the concentration was kept at 1 × 10-5 M and only the water fraction (volume%) was changed from 0% to 90%. The aggregation leads to the restriction of the solvation-induced nonradiative deactivation to recover and enhance the emission. In the experiment, the researchers used many compounds, for example, 5,8-Dibromoquinoxaline (cas: 148231-12-3Reference of 148231-12-3).
5,8-Dibromoquinoxaline (cas: 148231-12-3) belongs to pyrazine derivatives. Pyrazine is an N-heterocyclic moiety, and it can be easily prepared from ethylenediamine and 1,2-diketone, α-hydroxyketone, α-methyl ketone. A number of pyrazine-based derivatives were used as dyes or fluorescent probes.Reference of 148231-12-3