X-traps in isotopically mixed benzene crystals: phosphorescence spectrum and zero-field splitting of the lowest triplet state

✍ Scribed by R.L. Christensen; J.H. van der Waals

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 737 KB
• Volume: 45
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80257-1

✦ Synopsis

We have observed temperaturedependent X-trap phosphorescence in &He crystals doped with CsD6. The observed Xtrap is identified as CeHe which is perturbed by the presence of C6De in a nearest-neighbor crystal site. Zero-field opticalmicrowave double resonance measurements on the X-traps give for the zero-field anisotropy parameter IEI a value of-20 f 5 MHz. This is an order of magnitude smaller than that observed for C6H6 in C6De and indicates for the X-traps a nearly hexagonal distribution of spin density in the 3Bru state. This difference shows that the electronic structure of the 3Btu state is sensitive to subtle changes in its environment.