The dynamic properties of the lowest triplet states of pyrazine and pyrimidine in zero magnetic field
- 1 January 1971
- journal article
- research article
- Published by Taylor & Francis in Molecular Physics
- Vol. 22 (1), 19-31
- https://doi.org/10.1080/00268977100102321
Abstract
The technique of microwave induced delayed phosphorescence has been used to determine the dynamic properties of the lowest triplet states of pyrazine and pyrimidine as guests in benzene host crystals at temperatures at and below 4.2 K. We report values for the total lifetimes of the individual triplet sublevels, their relative radiative decay rates, relative populating rates and relative steady state populations. From these experimental data, we can hope to discover the radiationless and radiative pathways responsible for the population and depopulation of the individual triplet sublevels. To this end, we have analysed the data in terms of simple considerations of the various spin-orbit coupling mechanisms involved in these processes. In most cases there is excellent qualitative agreement between theory and experiment.Keywords
This publication has 23 references indexed in Scilit:
- The dynamics of populating and depoulating of a phosphorescent triplet state as studied by microwave induced delayed phosphorescenceChemical Physics Letters, 1970
- Optical detection of electron-electron double resonance (EEDOR) in zero field of the triplet stateChemical Physics Letters, 1970
- Low-field and zero-field optical detection of magnetic resonance in a 3Nπ* state: pyrazineChemical Physics Letters, 1969
- Microwave induced delayed phosphorescenceChemical Physics Letters, 1969
- The structure of the zero-field transitions of phosphorescent quinoxalineChemical Physics Letters, 1969
- Optical pumping in an organic crystal: quinoxaline in dureneMolecular Physics, 1968
- Electronic states of azabenzenes: A critical reviewJournal of Molecular Spectroscopy, 1967
- Erratum: Spin-Orbit Coupling in AzinesReviews of Modern Physics, 1963
- Journal of Molecular Spectroscopy, 1961
- Spin-orbit coupling in pyrazineJournal of Molecular Spectroscopy, 1958