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BIBTEX RIS

Aplicação da espectroscopia de ressonância magnética nuclear para estudos de difusão molecular em líquidos: a técnica DOSY

2002; Brazilian Chemical Society; Volume: 25; Issue: 6a Linguagem: Inglês

10.1590/s0100-40422002000600020

ISSN

1678-7064

Autores

Alexandre de Souza, Antônio Laverde,

Tópico(s)

Advanced NMR Techniques and Applications

Resumo

DIFFUSION IN LIQUIDS: THE DOSY TECHNIQUE.Diffusion coefficients provide uniquely detailed and easily interpreted information on molecular organization and phase structure.They are quite sensitive to structural changes, and to binding and association phenomena, in particular for liquid colloidal or macromolecular systems.This paper describes the principles of diffusion measurements in liquids by pulsed magnetic field gradient spin-echo (PFG-SE) NMR spectroscopy.The important PFG-SE technique known as DOSY is presented and discussed.This is a noninvasive technique that can provide individual multicomponent translational diffusion coefficients with good precision in a few minutes, without the need for radioactive isotopic labelling.

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