Magnetic field modulation of the delayed fluorescence yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water
External magnetic field effects on the recombination fluorescence (MARY effect) in the photoionization reaction of N,N,N′,N′-Tetramethyl-p-phenylenediamine (TMPPD) in water and DMSO/water mixture are studied. Relatively large magnetic field effects (MFE), ∼ 2–4%, on the fluorescence yield are observ...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
1999-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X99000318 |
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| _version_ | 1850168249767952384 |
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| author | Sameh Saad Ali Günter Grampp Stephan Landgraf Michael Sacher |
| author_facet | Sameh Saad Ali Günter Grampp Stephan Landgraf Michael Sacher |
| author_sort | Sameh Saad Ali |
| collection | DOAJ |
| description | External magnetic field effects on the recombination fluorescence (MARY effect) in the photoionization
reaction of N,N,N′,N′-Tetramethyl-p-phenylenediamine (TMPPD) in water and DMSO/water mixture
are studied. Relatively large magnetic field effects (MFE), ∼ 2–4%, on the fluorescence yield are observed in
the extremely polar water solvent under magnetic fields as small as 3 mT. Such MFE is hardly expected in
water due to instability and very fast escape of the solvated electron from the solvent cage. Enhancement
in the signal-to-noise ratio and superior time resolution characterizing the technique of field modulation
allowed the detection of a very short lived radical ion pair (about 1 ns). The observed MARY spectra illustrate
that the singlet radical ion pair is more reactive than the triplet one. |
| format | Article |
| id | doaj-art-e146084f77b34f9d832f2ce49d2c2d8f |
| institution | OA Journals |
| issn | 1110-662X |
| language | English |
| publishDate | 1999-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e146084f77b34f9d832f2ce49d2c2d8f2025-08-20T02:21:01ZengWileyInternational Journal of Photoenergy1110-662X1999-01-011317718110.1155/S1110662X99000318Magnetic field modulation of the delayed fluorescence yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in waterSameh Saad Ali0Günter Grampp1Stephan Landgraf2Michael Sacher3Institute of Physical and Theoretical Chemistry, Technical University Graz, Technikerstr. 4/I, A-8010, AustriaInstitute of Physical and Theoretical Chemistry, Technical University Graz, Technikerstr. 4/I, A-8010, AustriaInstitute of Physical and Theoretical Chemistry, Technical University Graz, Technikerstr. 4/I, A-8010, AustriaInstitute of Physical and Theoretical Chemistry, Technical University Graz, Technikerstr. 4/I, A-8010, AustriaExternal magnetic field effects on the recombination fluorescence (MARY effect) in the photoionization reaction of N,N,N′,N′-Tetramethyl-p-phenylenediamine (TMPPD) in water and DMSO/water mixture are studied. Relatively large magnetic field effects (MFE), ∼ 2–4%, on the fluorescence yield are observed in the extremely polar water solvent under magnetic fields as small as 3 mT. Such MFE is hardly expected in water due to instability and very fast escape of the solvated electron from the solvent cage. Enhancement in the signal-to-noise ratio and superior time resolution characterizing the technique of field modulation allowed the detection of a very short lived radical ion pair (about 1 ns). The observed MARY spectra illustrate that the singlet radical ion pair is more reactive than the triplet one.http://dx.doi.org/10.1155/S1110662X99000318 |
| spellingShingle | Sameh Saad Ali Günter Grampp Stephan Landgraf Michael Sacher Magnetic field modulation of the delayed fluorescence yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water International Journal of Photoenergy |
| title | Magnetic field modulation of the delayed fluorescence
yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water |
| title_full | Magnetic field modulation of the delayed fluorescence
yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water |
| title_fullStr | Magnetic field modulation of the delayed fluorescence
yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water |
| title_full_unstemmed | Magnetic field modulation of the delayed fluorescence
yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water |
| title_short | Magnetic field modulation of the delayed fluorescence
yield in the photoionization reaction of N, N, N', N'-tetramethyl-p-phenylenediamine in water |
| title_sort | magnetic field modulation of the delayed fluorescence yield in the photoionization reaction of n n n n tetramethyl p phenylenediamine in water |
| url | http://dx.doi.org/10.1155/S1110662X99000318 |
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