Abstract
The photochemical properties of 4-styrylquinoline and its derivatives with fluorine and chlorine atoms and nitro group in the para-position of the styryl moiety were studied. Under irradiation in neutral alcohol solutions, these compounds undergo reversible trans-cis photoisomerization with quantum yields close to 0.5, and the cis-isomers undergo cyclization to give benz[i]phenanthridines with quantum yields that do not exceed 0.01. For several compounds, the primary product of photocyclization, dihydrobenz[i]phenanthridine, was spectrally detected. On passing from the neutral to protonated forms, the photoisomerization quantum yields of these styrylquinolines changed insignificantly, and the photocyclization did not occur at all.
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Original Russian Text © M.F. Budyka, N.I. Potashova, T. N. Gavrishova, V.M. Li, 2009, published in Khimiya Vysokikh Energii, 2009, Vol. 43, No. 5, pp. 424–430.
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Budyka, M.F., Potashova, N.I., Gavrishova, T.N. et al. Photoisomerization and photocyclization of 4-styrylquinoline derivatives. High Energy Chem 43, 370–376 (2009). https://doi.org/10.1134/S0018143909050075
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DOI: https://doi.org/10.1134/S0018143909050075