Electron spin resonance of Cu2+ impurities in l-arginine phosphate monohydrate single crystals
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2022
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Using electron paramagnetic resonance spectroscopy we studied single crystals of l-arginine phosphate monohydrate doped with copper. The angular dependence of the spectrum in three orthogonal planes shows that the Cu2+ ions occupy two symmetry related sites in the structure. The Zeeman and hyperfine coupling tensors were determined. The principal values are: g1=2.053, g2=2.054, g3=2.251, A1≈0,
and Superhyperfine interactions with 14N ligands, well resolved for certain orientations of the magnetic field, suggest that Cu impurities have three N ligands. In terms of the molecular structure and based in similar systems, our findings are discussed and suggestions are made.
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A. X-ray diffraction, D. Crystal structure, D. Electron paramagnetic resonance
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SANTANA, R. C. et al. Electron spin resonance of Cu2+ impurities in l-arginine phosphate monohydrate single crystals. Journal of Physics and Chemistry of Solids, Amsterdam, v. 63, n.10, p. 1857-1862, 2002. DOI: 10.1016/S0022-3697(02)00169-5. Disponível em: https://www.sciencedirect.com/science/article/pii/S0022369702001695. Acesso em: 26 maio 2023.