Abstract
The presence of two time-resolved emission bands is observed in trans-4-dimethylamino-4′-cyanostilbene dissolved in polar solvents using picosecond time-resolved spectroscopy. In a non-polar solvent, only the presence of a single emission band is observed at any temperature. A precursor-successor relationship occurs between the two species responsible for the two emission bands. It is concluded that the formation of a twisted intramolecular charge transfer (TICT) exicted state may explain these experimental results.
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