Electron transfer by singlet excited state of porphyn and electron acceptor affinity in rigid medium: photoacoustic phase angle analysis
Article Sidebar
Main Article Content
Abstract
Photoacoustic spectroscopy provides information about both amplitude and phase of the response of a system to an optical excitation process. This paper presents the studies of the phase in the electron transfer process between octaethylporphyn (OEP) and quinone molecules dispersed in a polymeric matrix. It was observed a tendency in the phase behavior to small values only in the spectral region near to 620 nm, while for shorter wavelength did not show any tendency. These measurements suggested that the electron transfer to acceptor occurred with the participation of octaethylporphyn singlet excited state.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
The corresponding author transfers the copyright of the submitted manuscript and all its versions to Eclet. Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.
Self-archive to institutional, thematic repositories or personal webpage is permitted just after publication. The articles published by Eclet. Quim. are licensed under the Creative Commons Attribution 4.0 International License.
References
CALLIS, J. The calorimetric detection of excited states. J. Res. Natl. Stand. Sect. A . v.80A, p.413-19, 1976. [ Links ]
CORNELIO, M.L., SANCHES, R., Monitoring electron transfer by photoacoustic spectroscopy. European Biophysics Journal, v.23, n. 6, p.439-42, 1995. [ Links ]
_____________. The use of photoacoustic spectroscopy to determine the critical distance for electron transfer. J. Biochem. Biophys. Methods. v.29, p.149-55, 1994. [ Links ]
KASHA, M. Discuss. Faraday Soc. v.9, p.14-9, 1950. [ Links ]
HARSHBARGER, W. R., ROBIN, M. B. Acco. Chem Res. v.6, p.329, 1973 [ Links ]
KHOLMOGOROV, V.E., BOBROSVSKII, A.P. Problems of Biophotochemistry. Moscow: Nauka, 1973. [ Links ]
McDONALD, F., WETSEL, G. Generalized theory of the photoacoustic effect. J. Appl. Phys. v.49, p.2313-22, 1978. [ Links ]
MERKLE, L. D., POWELL, R. C. J. Phys. C, v.11, p.303, 1977. [ Links ]
MILLER, J.R., BEITZ, J.V. Exotermic rate restriction on electron transfer in a rigid medium. J. Chem. Phys. v.71, p. 4579, 1979. [ Links ]
ROSENCWAIG, A., GERSHO, A. Theory of the photoacoustic effect with solids. J. Appl. Phys, v.47, p.64-9, 1976. [ Links ]
SCAIANO, J.C. (Ed.) CRC Handbook of Organic Photochemistry, Boca Raton, CRC Press, 1989. vol. 1, p.328. [ Links ]
____________. (Ed.) CRC Handbook of Organic Photochemistry, Boca Raton, CRC Press, 1989. vol.2. [ Links ]