The excited singlet and triplet absorption spectra of hematoporphyrin diacetate are presented. Extinction coefficients in the spectral range 420-700 nm are estimated. Two possible mechanisms of step excitation are proposed. The maximal stepexcitation efficiency is achieved at 450 nm.
Singlet-triplet absorption spectra of azoalkanes
โ Scribed by J. Metcalfe; S. Chervinsky; I. Oref
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 303 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The sin$ct-triplet absorption spectra of truns-azo-methane, truns-azo-ethane, trawls-azo-n-propane, and trans-azo-isopropane have been measured using the technique of oxygen perturbation. It was found that the triplet level lies 55.5 + 1.5 kcal mole-' above the ground state in these compounds. These results are compared with other measurements of the triplet energes of acyclic azo-compounds and the relevance of this energy to their phctochemistry is discussed.
๐ SIMILAR VOLUMES
## Rcccivcd 22 July 1976 The T't + SO absnrptron spectrum of 9,10-dichloroanthraccne single crystal was measured by observing delayed fluore+ ccncc. The transitron drpolc is pcrpcndiculdr to the molecular plant. The absorption cocffxicnt at 694 nm is estimated to bc 1 X 10e3 cm-\*.