Nuclear magnetic resonance pulse Fourier transform

I. P. Gerothanassis, Methods of avoiding the effects of acoustic ringing in pulsed Fourier transform nuclear magnetic resonance spectroscopy. Prog. Nud. Magn. Reson. Spectrosc., 1987,19, 267-329. 

The newer instruments (Figure 2.4c) utilize a radiofrequency pulse in place of the scan. The pulse brings all of the cycloidal frequencies into resonance simultaneously to yield a signal as an interferogram (a time-domain spectrum). This is converted by Fourier Transform to a frequency-domain spectrum, which then yields the conventional m/z spectrum. Pulsed Fourier transform spectrometry applied to nuclear magnetic resonance spectrometry is explained in Chapters 4 and 5. 

There are numerous books on FT-NMR. The reference book is R.R. Ernst, G. Bodenhausen and A. Wokaun (1987) Principles of Nuclear Magnetic Resonance in One and Two Dimensions. Oxford University Press, Oxford. We may also indicate T.C. Farrar and E.D. Becker (1971) Introduction to Pulse and Fourier Transform NMR Methods. Academic Press, New York. 

Wilson, M. A., and Goh, K. M. (1977). Proton-decoupled pulse Fourier-transform 13C nuclear magnetic resonance of soil organic matter. J. Soil Sci. 28, 645-652. 

In addition to the specific references given in the chapter, much of the classic treatment of relaxation comes from the book by Abragam,33 but there are many other discussions of this subject in almost every book on NMR. Additional details along the lines presented here are given in Pulse and Fourier Transform NMR by Thomas C. Farrar and Edwin D. Becker,97 Nuclear Magnetic Resonance Spectroscopy by Robin K. Harris,32 and The Nuclear Overhauser Effect in Structural and Conformational Analysis by D. Neuhaus and M. P. Williamson.98... 

CW = continuous-wave CW-NQR = continuous wave NQR DFT = density fiuictional theory EFG = electric field gradient IR = infrared NMR = nuclear magnetic resonance NQR = nuclear quadmpole resonance OSSE = octahedral site stabilization energy PAC = perturbed angular correlation pulse-FT = pulse-fourier transform TMED = tetramethylethylenediamine. 

FI. Farrar, T. C., Pulsed and Fourier transform nuclear magnetic resonance spectroscopy. Anal. Chem. 42, 109A-112A (1970). 

Basically two nuclear magnetic resonance (NMR) techniques can be used to determine the partition coefficient. The first is based on the Fourier transform NMR pulsed-gradient spin echo (FT-PGSE) self-diffusion techiuque, the other by the NMR paramagnetic relaxation technique. In both techniques the fraction of solute in the micelle, a, is determined and can thus be calculated through Equation 6.10. 

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