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Site selection polarization spectroscopy of the p-xylyl and duryl radicals

✍ Scribed by W.P. Cofino; J.W. Hofstraat; G.Ph. Hoornweg; C. Gooijer; C. Maclean; N.H. Velthorst

Book ID
103019926
Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
617 KB
Volume
98
Category
Article
ISSN
0009-2614

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✦ Synopsis

The srtc srlcction polarizarion technique can be employed fo establish dire& the symmetries of the individual vibron-K b.ulds in emission spectra of organic radicals. This is dlustrated by an investigation of the p-\ylyl and duo 1 radicals.

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High-resolution fluorescence and excitation spectra of hypericin in ethanol and in polyvinylbutiral are reported. Persistent spectral hole-burning is highly efficient in ethanol with a quantum yield q~hb ~ 1.1 Γ— 10-2. Evidence is shown for a photoproduct located at about 200 cm-~ below the burnt hol