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Solid state nuclear magnetic resonance of fossil fuels : an experimental approach / David E. Axelson

Author
Axelson, David E.
Published
[Montreal] : Published by Multiscience Publications in cooperation with CANMET, Energy, Mines, and Resources Canada, and the Canadian Govt. Pub. Centre, Suppy and Services Canada, [1985]
Copyright Date
©1985
Physical Description
vii, 226 pages : illustrations ; 24 cm
Additional Creators
Canada Centre for Mineral and Energy Technology

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Contents
PRINCIPLES OF SOLID STATE NMR: The I-S dipolar interatcion -- Dipolar decoupling -- Chemical shift anisotropy -- Relaxation in the rotating frames -- Cross polarization -- RELAXATION PROCESSES INTRODUCTION TO PULSE SEQUENCES: Cross polarization relaxation Tch -- Proton rotating frame spin-lattice relaxation time T1eh -- Dipolar dephasing -- Carbon-13 rotating frame spin-lattice relaxation -- Carbon-13 spin-lattice relaxation (with cross polarization) -- Carbon-13 spin-spin relaxation T2c -- Proton spin-lattice relaxation T1H -- Cross polarization with flip back of I-spin magnetization -- Choosing the recycle delay in CPMAS experiments -- QUANTITATIVE ABALYSIS: Model compound relaxation data -- Model polymer relaxation -- Quantitative analysis of fossil fuels -- Carbon-counting -- Spin diffusion -- REMOVAL OF ARTIFACTS FROM CPMAS FR EXPERIMENTS: Spin temperature alternation -- Magic angle alternation -- Magic angle spinning -- Impurities in probe materials -- Digitization errors -- Spurious Rf signals -- Accounstic ringing -- Arcing -- Spurious signals due to hardware/software errors -- Digitization -- Recovery times -- Miscellaneous problems and comments -- LINE BROADENING MECHANISMS: Incomplete motional narrowing --Inhomogenous and homogenous linewidths -- Chemical shift dipersion -- Motional modulation of the CH coupling -- Motional modulation of resonance frequency via chemical shift anisotropy -- Magic angle missettling -- Magnetic susceptibility broadening -- Rotor instabilities -- Off-resonance proton irradiation -- Insufficient decoupling power -- Quadrupolar interactions -- Characterization of line broadening mechanisms -- RESOLTUTION ENHANCEMENT OF SOLID STATE NMR SPECTRA: Variable temperature studies -- Variable frequency/field studies -- Mathematical enhancement -- Resolution enhancement based on differences in relaxation rates -- Carbon-13 enrichment -- Selective saturation -- Selective irradiation of spinning sidebands -- Miscellaneous techniques -- 13C CPMAS OF FOSSIL FUELS-GENERAL APPLICATIONS: Aromaticity -- Rank -- Macerals -- Oil Shales -- Thermal effects -- Coalification -- Miscellaneous studies -- Proton NMR studies.
Subject(s)
ISBN
0919868258
Bibliography Note
Includes bibliographies and index.
View MARC record | catkey: 282418