title: Solvatochromic fluorescent 2-substituted 3-ethynyl quinoxalines: four-component synthesis, photophysical properties, and electronic structure.
abstract: 2-Substituted 3-ethynylquinoxalines can be rapidly synthesized in generally excellent yields by a consecutive four-component synthesis starting from electron-rich π-nucleophiles, oxalyl chloride, terminal alkynes, and 1,2-diaminoarenes. The title compounds are highly fluorescent with a pronounced emission solvatochromism. The photophysical properties and electronic structure were additionally corroborated by computations on the DFT level of theory.
authors.affiliation: Institut für Organische Chemie und Makromolekulare Chemie and ‡Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine Universität Düsseldorf , Universitätstrasse 1, D-40225 Düsseldorf, Germany.
authors.forename: Charlotte F
authors.initials: CF
authors.lastname: Gers
authors.forename: Jan
authors.initials: J
authors.lastname: Nordmann
authors.forename: Ceyda
authors.initials: C
authors.lastname: Kumru
authors.forename: Walter
authors.initials: W
authors.lastname: Frank
authors.forename: Thomas J J
authors.initials: TJ
authors.lastname: Müller