A complete fluorine-19 NMR characterization of a commercial grade sample of perfluorohexanes
1987; Elsevier BV; Volume: 36; Issue: 1 Linguagem: Inglês
10.1016/s0022-1139(00)82055-2
ISSN1873-3328
Autores Tópico(s)Mass Spectrometry Techniques and Applications
ResumoThe complete qualitative and quantitative chemical characterization of a complex, commercial grade sample of ‘perfluorohexanes’ has been accomplished with the use of a single instrumental analytical method: fluorine-19 nuclear magnetic resonance (F-nmr) spectroscopy. With the combination of routine one dimensional (ID) and two dimensional (2D) F-nmr data acquisition techniques, the commercial grade sample was found to be composed of all five acyclic perfluorohexane isomers and two cyclic perfluorinated alkanes. The F-nmr spectra yielded information about chemical shifts, spin-spin fluorine-fluorine (F-F) coupling constants, and relative intensities for fluorine nuclei in all components. The qualitative and quantitative specificity of the F-nmr analysis method circumvented the need to use other instrumental analytical methods for composition evaluations.
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