Magnetic and Optical Properties of Aromatic Hydrocarbon Cation Radical Salts
| Autor: | Yoichiro Sato, Minoru Kinoshita, Hideo Akamatu, Mizuka Sano |
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| Rok vydání: | 1969 |
| Předmět: | |
| Zdroj: | Bulletin of the Chemical Society of Japan. 42:3051-3055 |
| ISSN: | 1348-0634 0009-2673 |
| DOI: | 10.1246/bcsj.42.3051 |
| Popis: | Stable cation radical salts were prepared by oxidation of perylene, 9,10-diphenylanthracene, 9,10-dimethylanthracene, and 9,10-dichloranthracene with antimony pentachloride. Perylene perchlorate was also obtained in a stable form. From the temperature variations of their paramagnetic susceptibilities, the exchange coupling constants for these salts were found to increase in the sequence of above listing ranging from ∼0 to 8.5×10−2 eV. The absorption spectra of these solid compounds were compared with those observed with solutions. While the absorption bands of each salt in the visible region were found to correspond to those of the solution spectrum of the respective compound, an extra absorption band was observed in the near-infrared region for compounds with larger exchange coupling constants. The appearance of the new absorption band was reasonably ascribed to charge-transfer interaction between the radicals. These observations are considered to support further our previous suggestion that the magnitud... |
| Databáze: | OpenAIRE |
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