Infrared dispersion analysis and raman scattering spectra of taurine single crystals

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dc.creatorRoberto Luiz Moreira
dc.creatorRicardo P. S. M. Lobo
dc.creatorAnderson Dias
dc.date.accessioned2023-11-21T17:12:37Z
dc.date.accessioned2025-09-08T23:48:20Z
dc.date.available2023-11-21T17:12:37Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipFINEP - Financiadora de Estudos e Projetos, Financiadora de Estudos e Projetos
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1016/j.saa.2017.07.017
dc.identifier.issn1386-1425
dc.identifier.urihttps://hdl.handle.net/1843/61188
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
dc.rightsAcesso Restrito
dc.subjectTaurina
dc.subjectAminoácidos
dc.subjectRaman, Efeito de
dc.subjectEspectroscopia de infravermelho
dc.subjectDeterminação de tamanho de partícula
dc.subjectCristais
dc.subjectDetectores químicos
dc.subject.otherTaurine
dc.subject.otherAmino acids
dc.subject.otherRaman spectra
dc.subject.otherInfrared spectroscopy
dc.subject.otherDispersion analysis
dc.subject.otherMonoclinic crystals
dc.titleInfrared dispersion analysis and raman scattering spectra of taurine single crystals
dc.typeArtigo de periódico
local.citation.epage284
local.citation.spage276
local.citation.volume188
local.description.resumoA comprehensive set of optical vibrational modes of monoclinic taurine crystals was determined by Raman scattering, and infrared reflectivity and transmission spectroscopies. By using appropriate scattering/reflection geometries, the vibrational modes were resolved by polarization and the most relevant modes of the crystal could be assigned. In particular, we were able to review the symmetry of the gerade modes and to resolve ambiguities in the literature. Owing to the non-orthogonal character of Bu modes in monoclinic crystals (lying on the optic axial plane), we carried out a generalized Lorentz dispersion analysis consisting of simultaneous adjust of infrared-reflectivity spectra at various light polarization angles. The Au modes (parallel to the C2-axis) were treated within the classical Lorentz model. The behavior of off-diagonal and diagonal terms of the complex dielectric tensors and the presence of anomalous dispersion were discussed as consequences of the low symmetry of the crystal.
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0003-2355-6856
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S1386142517305760

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