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Master's Dissertation
DOI
https://doi.org/10.11606/D.54.2012.tde-12062012-114215
Document
Author
Full name
Ricardo Alberto Giannoni
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1991
Supervisor
Committee
Gandra, Flavio Cesar Guimarães
Gonzalez, Jose Pedro Donoso
Tannus, Alberto
Title in Portuguese
Implementação das técnicas de overhauser e desacoplameto em espectroscopia por RMN
Keywords in Portuguese
Desacoplamento
Efeito Overhauser
Espectroscopia
Ressonância dupla
RMN
Abstract in Portuguese
A técnica de dupla ressonância unidimensional para alta resolução em líquidos constitui o objetivo deste trabalho. Para isso construiu-se uma sonda de dupla ressonância, apropriada para experiências heteronucleares do tipo 13C-{1H}. Empregam-se algumas sequências de pulsos para permitir as medidas do EON e do desacoplamento nuclear entre 1H e 13C. Emprega-se o EON com a finalidade de obter um aumento na intensidade do sinal de RMN do 13C; emprega-se o desacoplamento para eliminar a estrutura fina que surge devido ao acoplamento nuclear entre 1H e 13C. Inclui-se uma breve revisão sobre a teoria com a fmalidade de unificar o tratamento desta com as aplicações. As técnicas experimentais são discutidas e alguns espectros são mostrados para ilustrar os principais resultados
Title in English
Implementation of overhauser and decoupling techniques bt NMR spectrocopy
Keywords in English
Decoupling
Double resonance
NMR spectroscopy
Overhauser
Abstract in English
The one dimensional double resonance technique for high resolition in liquids is the main purpose of this work. For this we have built a double resonance probe, suitable for heteronuclear 13C-{1H} experiment. Some pulse sequences are employed to allow the NOE and decoupling between 1H e 13C to be measured. The NOE is employed in order to obtain a three-fold enhancement of the 13C NMR signal; decoupling is employed to eliminate the fme structW'e arising from spin coupling between 1H e 13C. A short review about theory is included to provide unified treatment with applications. The experimental techniques are discussed and some spectra are shown to illustrate the main results.
 
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RicardoGiannoniM.pdf (3.48 Mbytes)
Publishing Date
2012-06-12
 
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