HIGH REACTIVITY OF HETEROCOERDIANTHRONES (HCDS) IN PHOTOPEROXIDATION AND THERMAL-STABILITY OF THEIR ENDOPEROXIDES - USE OF HCD AS A PHOTOSENSITIZER UNDER SUNLIGHT

Authors
MOTOYOSHIYA J MASUNAGA T HARUMOTO D ISHIGURO S NARITA S HAYASHI S
Citation
J. Motoyoshiya et al., HIGH REACTIVITY OF HETEROCOERDIANTHRONES (HCDS) IN PHOTOPEROXIDATION AND THERMAL-STABILITY OF THEIR ENDOPEROXIDES - USE OF HCD AS A PHOTOSENSITIZER UNDER SUNLIGHT, Bulletin of the Chemical Society of Japan, 66(4), 1993, pp. 1166-1171
Citations number
30
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Chemical Society of Japan → ACNP
ISSN journal
00092673
Volume
66
Issue
4
Year of publication
1993
Pages
1166 - 1171
Database
ISI
SICI code
0009-2673(1993)66:4<1166:HROH(I>2.0.ZU;2-J
Abstract
The measured reactivity indices (beta-values) of heterocoerdianthrones (HCDs) in self-sensitized photoperoxidation indicate a high reactivit y toward singlet-oxygen. Such a high reactivity is not only due to an effective singlet-oxygen production due to the highly fluorescent char acter, but also due to a strained structure, as predicted by a molecul ar calculation. On the other hand, the large thermal stability of thei r endoperoxides (POs), revealed by the large activation energy in ther mal decomposition, is also explained by considering the strained struc ture of the parent HCDs. As a prospect of solar synthesis, one of the HCD derivatives was applied to a photosensitizer for singlet-oxygen ox idation.