333771-86-1Relevant academic research and scientific papers
Synthesis and photophysics of ambipolar fluoren-9-ylidene malononitrile derivatives
Estrada, Leandro A.,Neckers, Douglas C.
, p. 8484 - 8487 (2009)
(Figure Presented) The efficient synthesis of ambipolar 2,7- and 3,6-disubstituted fluoren-9-ylidene malononitrile derivatives (4 and 9) is described. Structure-activity relationships depend on the position of substitution. Population of the S1 excited state in the 2,7-disubstituted FM derivatives is achieved via higher states, as evidenced from the UV-vis absorption and emission spectra. The results are supported by TDDFT calculations. Charge transfer states were the main deactivation path of the excited states of ambipolar 9b in polar solvents, as evidenced by fluorescence spectroscopy. 2009 American Chemical Society.
