The effect of CuII ions in L-asparagine single crystals

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dc.creatorSantana, Ricardo Costa de
dc.creatorGontijo, Henrique de Oliveira
dc.creatorMenezes, Arthur F.
dc.creatorMartins, José A.
dc.creatorCarvalho, Jesiel Freitas
dc.date.accessioned2024-01-19T13:03:05Z
dc.date.available2024-01-19T13:03:05Z
dc.date.issued2016
dc.description.abstractWe report the synthesis, crystal growth, and spectroscopic characterization of L-asparagine monohydrate (LAM) single crystals doped with CuII. The crystals were successfully grown by slow cooling from a supersaturated aqueous solution up to size of 16 12 2 mm3 ;the effect of copper impurities in the crystals morphology was discussed. Electron Paramagnetic Resonance (EPR) was used to calculate the g and hyperfine coupling (A) tensors of the CuII ions (g1¼2.044, g2¼2.105, g3¼2.383and A1E0, A2¼35, A3¼108 Gauss). The EPR spectra for certain orientations of the magnetic field suggest that CuII ions are coordinated to two 14N atoms. Correlating the EPR and optical absorption results, the crystal field and the CuII orbital bond parameters were calculated. The results indicate thaWe report the synthesis, crystal growth, and spectroscopic characterization of L-asparagine monohydrate (LAM) single crystals doped with CuII. The crystals were successfully grown by slow cooling from a supersaturated aqueous solution up to size of 16 12 2 mm3 ;the effect of copper impurities in the crystals morphology was discussed. Electron Paramagnetic Resonance (EPR) was used to calculate the g and hyperfine coupling (A) tensors of the CuII ions (g1¼2.044, g2¼2.105, g3¼2.383and A1E0, A2¼35, A3¼108 Gauss). The EPR spectra for certain orientations of the magnetic field suggest that CuII ions are coordinated to two 14N atoms. Correlating the EPR and optical absorption results, the crystal field and the CuII orbital bond parameters were calculated. The results indicate that the paramagnetic center occupies interstitial rhombic distorted site and the ground orbital state for the unpaired electron is the d(x2 -y2 ).t the paramagnetic center occupies interstitial rhombic distorted site and the ground orbital state for the unpaired electron is the d(x2 -y2 ).
dc.identifier.citationSANTANA, Ricardo C. et al. The effect of CuII ions in l-asparagine single crystals. Physica B: condensed matter, Amsterdam, v. 501, p. 84-89, 2016. DOI: 10.1016/j.physb.2016.08.007. Disponível em: https://www.sciencedirect.com/science/article/pii/S0921452616303428. Acesso em: 18 jan. 2024.
dc.identifier.doi10.1016/j.physb.2016.08.007
dc.identifier.issn0921-4526
dc.identifier.issne- 1873-2135
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0921452616303428
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectOrganic compound
dc.subjectCrystal growth
dc.subjectElectron Paramagnetic Resonance (EPR)
dc.subjectCrystal field
dc.titleThe effect of CuII ions in L-asparagine single crystals
dc.typeArtigo

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