... The Journal of Organic Chemistry. ... J. Org. Chem. ... Herein, we report the physical properties of diimidazo[1,2-a:2′,1′-c]quinoxalinium salts (2·X), which showed fluorescence properties resembling those of the parent diimidazo[1,2-a:2′,1′-c]quinoxalines (1) in organic solvents. ...