Effect of oxygen on phthalocyanine radicals. 1. ESR study of lithium phthalocyanine spin species at different oxygen concentrations
| Autor: | F. Bensebaa, J. J. Andre |
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| Rok vydání: | 1992 |
| Předmět: |
Spins
Chemistry Radical General Engineering chemistry.chemical_element Atmospheric temperature range Oxygen Crystallographic defect law.invention Crystallography chemistry.chemical_compound law Phthalocyanine Limiting oxygen concentration Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | The Journal of Physical Chemistry. 96:5739-5745 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100193a016 |
| Popis: | Magnetic resonance data of LiPc . , in the temperature range 4.2-380 K, are reported and analyzed. The low-temperature ESR spectrum exhibits two distinguishable lines that we call A and C, whereas at high temperature a third line, denoted by B, develops. Detailed studies of these three line as a function of oxygen concentration, crystal orientation, and microwave power indicate that line A is associated with diffusing spins more or less localized by interaction with the spins of oxygen. Line B is also due to diffusing spins, but with those that never interact with O 2 , while line C is associated with localized spins due to crystal defects |
| Databáze: | OpenAIRE |
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