Quantum yields for singlet oxygen [01( 'A,)] production ( QA) were measured on quenching of the triplet states of one-way isomerizing 2-anthrylethylenes by means of the singlet oxygen luminescence technique. The trans triplets of these oletins yielded OZ( 'A,) efficiently through energy transfer. Th
Singlet oxygen luminescence as a probe of the stilbene triplet surface
β Scribed by A.A. Gorman; M.A.J. Rodgers
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 352 KB
- Volume
- 120
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The quenching of slilbene ~riplrt by oxygen in benzene produces single1 oxygen. O,( 'Ag). with an efficiency or 38~58. This value. logether with the corresponding rate consram. shows Ihal the 02('AB) produced cannor be the consequence or exclusive oxygen quenching or a low concenlralion or planar lrans-niplet in rapid equilibrium wilh the perpendicular form. * Based on the published steady+tate Ka,(= k&lkd) v;llue of 51 P mol-t [ 61 and a 61 ns triplet lifeiimc.
π SIMILAR VOLUMES
Data on the rate of triplet-triplet energy transfer to stilbenes are reinterpreted in terms of the overlap of the TI H So transition bands in the sensitizer and acceptor. So-called 'non-vertical" excitation follows closely the Franck-Condon probabilities in the spectra, the "phantom triplet" being i
Sharp emission bands superimposed on ordinary incandescent tungsten lamp output have been observed. These definite spectroscopic bands have been tentatively assigned to Single and Simultaneous Transitions in molecular oxygen. An alternative explanation of a perturbed molecular oxygen, [W.. \_ 021. h
## Abstract Photodynamic inactivation of bacteria (PDIB) is considered a new approach for the struggle against multiresistant bacteria. To achieve a sufficient level of bacteria killing, the photosensitizer must attach to and/or penetrate the bacteria and generate a sufficiently high amount of sing