✦ LIBER ✦

Site selection spectroscopy and photochemical hole-burning of hypericin

✍ Scribed by S.M. Arabei; J.P. Galaup; P. Jardon

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 588 KB
Volume: 232
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01324-o

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✦ Synopsis

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 × 10-2. Evidence is shown for a photoproduct located at about 200 cm-~ below the burnt hole. Possible photochemical reactions are discussed.

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