Nuclear magnetic resonance introduction

The Fourier transform in chemistry. Part /. Nuclear magnetic resonance - introduction... 

Nuclear magnetic resonance, NMR (Chapter 13 introduction) A spectroscopic technique that provides information about the carbon-hydrogen framework of a molecule. NMR works by detecting the energy absorptions accompanying the transitions between nuclear spin states that occur when a molecule is placed in a strong magnetic field and irradiated with radiofrequency waves. 

Solid state materials have been studied by nuclear magnetic resonance methods over 30 years. In 1953 Wilson and Pake ) carried out a line shape analysis of a partially crystalline polymer. They noted a spectrum consisting of superimposed broad and narrow lines which they ascribed to rigid crystalline and amorphous material respectively. More recently several books and large articles have reviewed the tremendous developments in this field, particularly including those of McBrierty and Douglas 2) and the Faraday Symposium (1978)3) —on which this introduction is largely based. 

B. Nuclear Magnetic Resonance Spectroscopy of B 12-Derivatives 1. Introduction... 

If one wishes to obtain a fluorine NMR spectrum, one must of course first have access to a spectrometer with a probe that will allow observation of fluorine nuclei. Fortunately, most modern high field NMR spectrometers that are available in industrial and academic research laboratories today have this capability. Probably the most common NMR spectrometers in use today for taking routine NMR spectra are 300 MHz instruments, which measure proton spectra at 300 MHz, carbon spectra at 75.5 MHz and fluorine spectra at 282 MHz. Before obtaining and attempting to interpret fluorine NMR spectra, it would be advisable to become familiar with some of the fundamental concepts related to fluorine chemical shifts and spin-spin coupling constants that are presented in this book. There is also a very nice introduction to fluorine NMR by W. S. and M. L. Brey in the Encyclopedia of Nuclear Magnetic Resonance.1... 

R.K. Harris, Nuclear Magnetic Resonance Spectroscopy Chapter 6, Longmans, 1997 C.A. Fyfe, Solid State NMR for Chemists, C.F.C. Press, 1983 M.J. Duer, Introduction to Solid-State NMR Spectroscopy, Black-well Science, London, 2004 M.J. Duer, Solid-State NMR Spectroscopy Principles and Applications, Blackwell Science, London, 2002. 

In the introduction to Volume 1 of this series, the founding editors, J. N. Pitts, G. S. Hammond and W. A. Noyes, Jr. noted developments in a brief span of prior years that were important for progress in photochemistry flash photolysis, nuclear magnetic resonance, and electron spin resonance. A quarter of a century later, in Volume 14 (1988), the editors noted that since then two developments had been of prime significance the emergence of the laser from an esoteric possibility to an important light source, and the evolution of computers to microcomputers in common laboratory use of data acquisition. These developments strongly influenced research on the dynamic behavior of the excited state and other transients. 

Vargha was very progressive as far as the application of new techniques was concerned. He aided the introduction of the various chromatographic methods and the use of infrared (i.r.) and nuclear magnetic resonance spectroscopy and mass spectrometry in solving the various problems of structure determination. Despite the fact... 

Nuclear magnetic resonance spectroscopy is a form of absorption spectroscopy and concerns radio frequency (rf)-induced transitions between quantized energy states of nuclei that have been oriented by magnetic fields. Several nonmathemati-cal introductions to NMR are recommended to supplement the material here [1-9]. For greater mathematical depth, a number of excellent texts are available [10-26]. 

Roberts, J. D., Introduction to the Analysis of Spin-Spin Splitting in High Resolu tion Nuclear Magnetic Resonance Spectra, W. A. Benjamin, New York, 1061. 

Eads, T.M. and Davis, E.A. 1994. Nuclear magnetic resonance and electron spin resonance. In Introduction to the Chemical Analysis of Foods (S.S. Nielsen, ed.) pp. 381-399. Jones and Bartlett Publishers, Boston. 

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. 

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