Synthesis of indole-based chromophores with TCF acceptor and the study of the quinoxalinone core effect on the linear and nonlinear optical properties

D-pi-A chromophores with indole donor and tricyanofuranyl acceptor moieties connected by vinylene and divinyl quinoxalinone p-conjugated bridges have been sythesized and their linear and nonlinear optical properties were studied. Chromophores exibit intramolecular charge-transfer (ICT) absorption band in the visible region, positive solvatochromism, and are transparent at 850 nm. The indole-based chromophore with divinylquinoxalinone pi-conjugation bridge shows large mu beta value (similar to 13000.10(-48)esu); the incorporation of the vinyl quinoxalinone unit leads to a significant increase in the values of the first hyperpolarizability. [GRAPHICS] .