The lowest excited states of styrylpyridines, dipyridylethylenes and of their conjugated acids have been studied by an INDO/S method. In these compounds the lowest excited states are of a ππ* nature, the nπ* states lying slightly above them. On the basis of these calculations the initial steps in the photophysical deactivation processes are discussed.
G. Orlandi, G. Poggi and G. Marconi, J. Chem. Soc., Faraday Trans. 2, 1980, 76, 598 DOI: 10.1039/F29807600598
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