An ESR study of various anthrasemiquinone radical anions obtained by in situ electrochemical method |
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| Affiliation: | 1. Departamento de Química Física y Química Cuántica, Madrid 34, Spain;2. Departamento de Electroquímica, Facultad de Ciencias, Universidad Autonoma de Madrid, Cantoblanco, Madrid 34, Spain;1. Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA;2. Department of Chemical and Biomolecular Engineering, Institute of Emergent Materials, Sogang University, Seoul, 04107, Republic of Korea;3. Department of Chemistry, University of Calgary, Calgary, AB T2N 1N4, Canada;1. Business School, The University of Western Australia, Australia;2. Griffith Business School, Griffith University, Australia;1. Washington University in St. Louis, George Warren Brown School of Social Work, St. Louis, MO 63130, USA;2. University of Georgia, School of Social Work, Athens, GA 30605, USA;3. University of Connecticut, School of Social Work, Hartford, CT 06103, USA;4. University of Maryland-Baltimore, School of Social Work, Baltimore, MD 21201, USA;5. University of South Carolina, College of Social Work, Columbia, SC 29208, USA;6. University of North Carolina – Chapel Hill, School of Social Work, Chapel Hill, NC 27514, USA;7. Vision Health International, PO Box 597, Grand Junction, CO 81502, USA;8. Division of Child and Adolescent Psychiatry, Washington University School of Medicine in St. Louis, USA |
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| Abstract: | Electron spin resonance spectra of seven derivatives of 9,10-anthrasemiquinone and 1,4-anthrasemiquinone are studied. These radicals have been obtained by in situ electrochemical reduction of the parent molecules.The compounds studied are: 9,10- (1), 2-chloro-1,4-dihydroxy-9,10- (2), 2,3-dichloro-1,4-dihydroxy-9,10-(3), 1,4-diacethoxy-6,7-dimethyl-9,10- (4), 1,4-dichloro- (5), 1,4-dihydroxy-9,10-anthrasemiquinone (6) and 9-chloro-10-methoxy-1,4-anthrasemiquinone (7).The hyperfine coupling constants (hfs) and the corresponding g factor are given. The assignment of these hfs is justified. |
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