F.C. Bos, D.M. Burland
Physical Review Letters
An unusually large zero-field splitting of the lowest triplet state has been observed directly in the phosphorescence spectrum of the xanthione molecule in a xanthone host crystal. There are two xanthione guest sites in the host crystal. In one of the sites the zero-field parameter D is -11 cm-1 and in the other it is -20 cm-1. These results have been confirmed by measurements of the Zeeman splittings. It is argued that the large D values are due to spin-orbit coupling. © 1980.
F.C. Bos, D.M. Burland
Physical Review Letters
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OTF 1993
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Macromolecules
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