Implementação da nova técnica espectroscopia Raman por elipsometria no estudo de moléculas quirais

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Basílio, Fernando Costa
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Uberlândia
BR
Programa de Pós-graduação em Física
Ciências Exatas e da Terra
UFU
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://repositorio.ufu.br/handle/123456789/15667
https://doi.org/10.14393/ufu.di.2014.499
Resumo: The Raman Optical Activity (ROA) has been offered numerous information about the conformation of chiral molecules, an these, has great relevance in many areas, including Biology and Medicine. In present work we investigated a new technique to measure the Raman Optical Activity of chiral molecules: the Raman Spectroscopy by Ellipsoetry (RaSE). The technique ROA quantifies the vibrational optical activity through measurement of a small difference in the intensity of Raman scattering for chiral molecules in incidence of polarized circularly right and left laser light. The RaSE is the application of ellipsometry to measure the Raman scattering, that means, through the technique of ellipsometry we can measure the Stoke parameters, which describe the polarization state of light. The exciting source in RaSE is a laser light beam which can be decomposed into two polarizations: a beam of circularly polarized light right or left. Therefore, the parameter S3 describes the amount of light and when normalized ROA is the acquired signal, therefore provide the difference of intensity of Raman scattering. With this concepts, we performed measurements of RaSE using alcohol (S)-(−)-1-phenylethanol (1-PhEtOH), that was the first chiral substance been characterized using the Raman Optical Activity. The spectrum ROA of 1-PhEtOH using the RaSE is fully agreement with the literature and proves the veracity of the results of RaSE.