Herein, we have synthesized four indolo [2,3-b]quinoxalin-2-yl)(phenyl)methanone derivatives 1−4 by cyclocondensation. The photophysical studies of dyes in various solvents and neat solid lm exhibit typical electronic spectra with inbuilt intramolecular charge transfer (ICT) (λ max : 397-490 nm) con rming donoracceptor architecture. Herein, dyes uoresce in the blue-orange region (λ Emax : 435-614) on excitation at their ICT maxima in toluene, ethyl acetate, chloroform, DMSO, and neat solid lm. 1 and 2 which exhibit good emission intensity in all mediums, were studied for aggregation-induced emission (AIE) effect.Electrochemical studies indicate 1−4 possess relatively low lying LUMO (-3.65 to -3.98 eV) comparable to reported n-type/electron-transporting materials. The HOMO and LUMO energy levels in 1−4 were evaluated by DFT and TD-DFT calculations. TGA analysis shows 1−4 exhibit good thermal stability. The characteristic optoelectronic properties and thermal stability signify these dyes are potential candidate for their application in optoelectronics.
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