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Chemiluminescent reactions of E-2-hydroxy-4′-substituted stilbenes with singlet oxygen

✍ Scribed by A. Mylona; J. Nikokavouras; I.M. Takakis

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
586 KB
Volume
53
Category
Article
ISSN
1010-6030

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✦ Synopsis

The reactions of 11 E-2-hydroxy-4'-substituted stilbenes with singlet oxygen in alkaline media are chemiluminescent, but less efficient than the corresponding reactions with ozone. The chemiluminescence spectra are identical with the fluorescence emission spectra. A plot of the chemiexcitation quantum yields vs. Hammett's (T constants of the 4'-substituents is almost linear. The possible formation of a 1,2-dioxetane intermediate is not implicated by product analysis. The stilbenol anion is considered to be the primary light emitter. An electron-transfer mechanism is invoked to rationalize the results.

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✍ Ioannis M. Takakis; Roger N. Hayes; Anastasia Mylona; John Nikokavouras 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 319 KB

## New Mass Spectra The Mass Spectra of (a-ZHydroxy-and (2)-and (E)-2-Methoxymethoxy-4'-substituted Stilbenes The mass spectral properties of stilbenes have been investigated extensively.'.' The reports, however, on ring monos~bstituted~.~ and ring disubstituted3\*' derivatives are scarce.