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An unusually large zero-field splitting in the molecule xanthione

โœ Scribed by D.M. Burland

Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
426 KB
Volume
70
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

An unusually large zero-field sphttmg of the lowest triplet state has been observed duectly m the phosphorescence spectrum of the vanthlonc molecule m a vanthone host crystal. There are two xantluone guest sites in the host crystal Ln one of the sltcs the zero-field parameter D IS -11 cm-' and m the other rt IS -20 cm-'. These results have been confiimcd by measurcmcnts of the Zceman sphttmgs. It IS argued that the large D values are due to spin-orblt couplmg

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The optical spectra of AgX : Ni z + (X = CI, Br) in the O h system, and the ZFS parameter D in the axial system have been calculated by means of the pKa model of the Ni 2 + 6X (X = F, CI, Br, I) cluster. The calculation shows that the band distance in AgX:Ni z+ has been reduced isotropically and the