Publikation: Photochemical Investigations and ESR Triplet Spectra of Oxazine, Thiazine and Seleneazine Dyes
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1975
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Zeitschrift für Physikalische Chemie, Neue Folge. 1975, 94(1-3), pp. 101-106. ISSN 0942-9352. Available under: doi: 10.1524/zpch.1975.94.1-3.101
Zusammenfassung
Flash photolysis experiments of the photoreduction of oxonine, thionine, and selenine showed that for all three dyes the rate constant of the electron transfer process between the reducing agent allylthiourea and the acid triplet form is considerably higher than that of the corresponding reaction with the basic form. The higher reactivity of the acid triplet form can be related to its higher redox potential which is available from the difference of the pK values of triplet and semichinone of the dye. The zero-field splitting parameters of ESR triplet spectra of the dyes, mentioned above, and their tetramethylsubstituted derivatives were determined.
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540 Chemie
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VOGELMANN, Ekehardt, Hartmut SCHMIDT, Ulrich STEINER, Horst E. A. KRAMER, 1975. Photochemical Investigations and ESR Triplet Spectra of Oxazine, Thiazine and Seleneazine Dyes. In: Zeitschrift für Physikalische Chemie, Neue Folge. 1975, 94(1-3), pp. 101-106. ISSN 0942-9352. Available under: doi: 10.1524/zpch.1975.94.1-3.101BibTex
@article{Vogelmann1975Photo-9546,
year={1975},
doi={10.1524/zpch.1975.94.1-3.101},
title={Photochemical Investigations and ESR Triplet Spectra of Oxazine, Thiazine and Seleneazine Dyes},
number={1-3},
volume={94},
issn={0942-9352},
journal={Zeitschrift für Physikalische Chemie, Neue Folge},
pages={101--106},
author={Vogelmann, Ekehardt and Schmidt, Hartmut and Steiner, Ulrich and Kramer, Horst E. A.}
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<dcterms:abstract xml:lang="eng">Flash photolysis experiments of the photoreduction of oxonine, thionine, and selenine showed that for all three dyes the rate constant of the electron transfer process between the reducing agent allylthiourea and the acid triplet form is considerably higher than that of the corresponding reaction with the basic form. The higher reactivity of the acid triplet form can be related to its higher redox potential which is available from the difference of the pK values of triplet and semichinone of the dye. The zero-field splitting parameters of ESR triplet spectra of the dyes, mentioned above, and their tetramethylsubstituted derivatives were determined.</dcterms:abstract>
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