Fluorescence Control on Panchromatic Spectravia C-Alkylation on Arylated Quinoxalines

摘要

A coherent green fluorescence was obtained by butylationat the 2-position of panchromatic 2,3-diaryl-5,8-diarylqui-noxalines (2) to give corresponding 2-butyl-2,3-diaryl-5,8-diaryl-1H-quinoxalines (3). Full color quinoxaline derivatives(2) were prepared from electronic modification at either the2,3- or 5,8-positions at the peripheral ArX group or X group (X = —H, —OMe, —NPh_2, —NMe_NMePh) of thequinoxalines. 2-Butylation converted one imine unit of thepyrazine ring to an amine group, which effectively alteredthe electron donor and acceptor functions to produce acoherent green fluorescence.