EPR study of the phenothiazine cation radical |
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| Affiliation: | 1. Department of Physics, Universidade Estadual de Maringá, Avenida Colombo, 5790 - 87020-900 Maringá, Paraná, Brazil;2. Department of Physics, Universidade Estadual de Ponta Grossa - Ponta Grossa, PR 87030-900, Brazil;3. Dipartimento di Scienza Applicata del Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;4. Laboratory of Materials, Macromolecules and Composites, Federal University of Technology (UTFPR), 86812-460 Apucarana, Paraná, Brazil;5. Department of Physics, Federal University of Technology (UTFPR), Rua Marcílio Dias 635, 86812-460 Apucarana, Paraná, Brazil;1. Department of Medical Bioengineering, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan;2. Department of Applied Chemistry, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan;3. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;4. Department of Applied Chemistry, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan;1. Materials Research Institute, School of Physics and Astronomy, Queen Mary University of London, Mile End Road, E1 4NS, London, United Kingdom;2. College of Physical Science and Technology, Sichuan University, Chengdu 610064, China;1. Dipartimento di Scienze Chimiche e Farmaceutiche, Via Fossato di Mortara 17, 44121, Italy;2. ISOF CNR, UoS di Ferrara, c/o Dipartimento di Scienze Chimiche e Farmaceutiche, Via Fossato di Mortara 17, 44121, Italy;1. Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do, 448-701, Republic of Korea;2. School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 446-740, Republic of Korea;1. Department of Neurosurgery, Keio University, School of Medicine, Tokyo, Japan;2. Department of Neurology, Keio University, School of Medicine, Tokyo, Japan |
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| Abstract: | The EPR parameters of the phenothiazine cation radical (PTAZ+) have been determined with the sample in the form of a power and in sulphuric solution. The study of the solution at different temperatures in the 77–333 K range does not indicate conformational changes affecting the α proton, but shows a difference in g-values between the powder and the solution spectra. This variation can be interpreted as originated by changes in the molecular geometry of the cation ring system due to interactions with the solvent molecules. |
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