NMR theory

An extensive presentation of the modern NMR theory, standard text for 2D NMR. Abragam A 1961 Principies of Nuciear Magnetism (Oxford Clarendon)... 

T. M. Duncan and C. R. Dybowski. Surf Sci. Rep. 1,157,1981. An excellent review of relevant NMR theory, modern techniques, and applicadons to surfaces. 

In NMR theory the analogue of the relation (1.57) connects the times of longitudinal (Ti) and transverse (T2) relaxation [39]. In the case of weak non-adiabatic interaction with a medium it turns out that T = Ti/2. This also happens in a harmonic oscillator [40, 41] and in any two-level system. However, if the system is perturbed by strong collisions then Ti = T2 as for y=0 [42], Thus in non-adiabatic theory these times differ by not more than a factor 2 regardless of the type of system, or the type of perturbation, which may be either impact or a continuous process. 

E. D. Becker 2000, High Resolution NMR Theory and Chemical Applications, Academic Press, New York, (pp.) 241—42. 

K. Albert 2002, (LC-NMR theory and experiment), in On -Line LC-NMR and Related Techniques, ed. K. Albert, John Wiley Sons, Chichester, (pp.) 13-17. 

This book is not intended to teach you NMR theory,but to give you a practical guide to the standard NMR experiments you will often need when you are doing structure determination or substance characterization work, and (in Part 2) to provide you with a set of graded problems to solve. At the beginning of Part 2 we shall recommend some books which you will find useful when you are working on the problems. 

Thus we shall try to take you through Part 1 without recourse to much theory. We shall however use many terms which will be unfamiliar to you if you have not yet had a course in NMR theory, and these will be emphasized by using bold lettering when they appear. You can then, if you wish, go to the index of whatever theory textbook you have available in order to find out exactly where you can read up on this topic. From time to time, when we feel it advisable to say one or two words about more theoretical aspects in our text, we shall do so using italics. 

E. D. Becker, High resolution NMR Theory and Applications , 3rd edn., Academic Press, 2000. 

According to NMR theory [30], contributions to spin-spin coupling come from paramagnetic spin-orbital (PSO), diamagnetic spin-orbital (DSO), Fermi contact (FC), and spin-dipolar (SD) interactions [30] ... 

According to standard NMR theory, the spin-lattice relaxation is proportional to the spectral density of the relevant spin Hamiltonian fluctuations at the transition frequencies coi. The spectral density is given by the Fourier transform of the auto-correlation fimction of the single particle fluctuations. For an exponentially decaying auto-correlation function with auto-correlation time Tc, the well-known formula for the spectral density reads as ... 

Molecular motions in low molecular weight molecules are rather complex, involving different types of motion such as rotational diffusion (isotropic or anisotropic torsional oscillations or reorientations), translational diffusion and random Brownian motion. The basic NMR theory concerning relaxation phenomena (spin-spin and spin-lattice relaxation times) and molecular dynamics, was derived assuming Brownian motion by Bloembergen, Purcell and Pound (BPP theory) 46). This theory was later modified by Solomon 46) and Kubo and Tomita48 an additional theory for spin-lattice relaxation times in the rotating frame was also developed 49>. 

Basic NMR theory for water determination with example of on-line process control. 

A fundamental discussion of NMR theory and technology has been published by Farrar and Becker [8] and, more recently, by Farrar [9] and Chandrakumar and Subramanian [10]. More advanced discussions appear in books by Abragam [11] Slichter [12] Carrington and McLachlan [13] and Pople etal. [14],... 

After a discussion of the fundamental concepts in Section II, we present, in Section III, an approach to the lineshape theory of dynamic NMR spectra which comprises the most general case, namely that of a multi-component system where various intra- and inter-molecular exchange processes take place. We believe that a fully correct NMR theory of such an equilibrium has not been put forward yet. Section IV is concerned with the methods of simulation and analysis of complicated dynamic spectra. In Section V, we present our views on solving the numerous practical problems which usually appear upon the application of the theory to the analysis of dynamic spectra. 

Yoder, C.H. and Schaeffer, C.D., Jr., Introduction to Multinuclear NMR Theory and Application, Benjamin/Cummings Publishing Co., Menlo Park, CA, 1987. 

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