The effect of molecular structure on the properties of quinoxaline-based molecules for OLED applications was written by Ledwon, Przemyslaw;Motyka, Radoslaw;Ivaniuk, Khrystyna;Pidluzhna, Anna;Martyniuk, Natalia;Stakhira, Pavlo;Baryshnikov, Glib;Minaev, Boris F.;Agren, Hans. And the article was included in Dyes and Pigments in 2020.SDS of cas: 148231-12-3 This article mentions the following:
Different donor-acceptor-donor (D-A-D) and donor-π-bridge-acceptor-π-bridge-donor (D-π-A-π-D) systems based on a quinoxaline acceptor are compared. A significant difference in electrochem. and photophys. properties was found depending on mol. structure. A luminescence shift from 539 up to 671 nm was observed upon extension of conjugation length. The studied compounds were tested in fluorescent organic light emitting diodes (OLEDs) demonstrating an external quantum efficiency up to 4.5% for a deep red nondoped device and 7% when doped into an exciplex host device. A quantum-chem. interpretation of the electroluminescence spectra for the fabricated OLEDs was carried out including modeling of excimers and exciplexes. In the experiment, the researchers used many compounds, for example, 5,8-Dibromoquinoxaline (cas: 148231-12-3SDS of cas: 148231-12-3).
5,8-Dibromoquinoxaline (cas: 148231-12-3) belongs to pyrazine derivatives. Pyrazines are part of several biologically active polycyclic compounds; examples are quinoxalines, phenazines; and the bio-luminescent natural products pteridines, flavins, and their derivatives. Pyrazines undergo nearly all of the same reactions as pyrimidines, from nucleophilic substitution (SNAr) to palladium-catalyzed cross coupling reactions.SDS of cas: 148231-12-3