Abstract
THE photo-dimerization of solid anthracene by ultraviolet irradiation has been reported1 and denied2. It has also been suggested2 that oxygen plays an essential part in photo-reactions of anthracene. We have proved by X-ray diffraction studies of single crystals of anthracene irradiated by ultraviolet light under various conditions: (1) that when radiation of wavelengths less than about 3000 Å is excluded, dimerization does take place; (2) that the presence of oxygen is not necessary; and (3) that the phenomenon is not wholly a surface effect.
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References
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Bernas, A., Leonardi, D., and Renaud, M., Photochem. and Photobiol., 5, 721 (1966).
Ehrenberg, M., Acta Cryst., 20, 177 (1966).
Lonsdale, K., Nave, E., and Stephens, J. F., Phil. Trans. A., 261, 1 (1966).
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O'DONNELL, M. Photo-dimerization of Solid Anthracene. Nature 218, 460–461 (1968). https://doi.org/10.1038/218460b0
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DOI: https://doi.org/10.1038/218460b0
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