THE EFFECT OF PRESSURE ON THE PHOTODIMERIZATION OF 7-METHOXYCOUMARIN CRYSTAL

Citation
A. Brillante et al., THE EFFECT OF PRESSURE ON THE PHOTODIMERIZATION OF 7-METHOXYCOUMARIN CRYSTAL, Chemical physics letters, 218(5-6), 1994, pp. 568-573
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
0009-2614
Volume
218
Issue
5-6
Year of publication
1994
Pages
568 - 573
Database
ISI
SICI code
0009-2614(1994)218:5-6<568:TEOPOT>2.0.ZU;2-J
Abstract
The dimerization reaction in crystals of 7-methoxycoumarin has been st udied in the range 0-6 GPa using FT-IR high-pressure spectroscopy. Und er UV irradiation the yield of the photodimer decreases linearly with pressure and at almost-equal-to 8 GPa the photoreaction is inhibited. Results are interpreted mainly in terms of non-topochemical dimers for ming at defect sides of the crystal and rapidly propagating via the su bsequent loss of order in the lattice.