Annual report on NMR spectroscopy. Volume eighty seven
Título:
Annual report on NMR spectroscopy. Volume eighty seven
ISBN:
9780128047576
Edición:
First edition.
PRODUCTION_INFO:
San Diego, CA : Academic Press, [2016]
©2016
Descripción física:
1 online resource (ix, 379 pages)
Contenido:
Front Cover; Annual Reports on NMR spectroscopy; Copyright; Contents; Contributors; Preface; Chapter One: Multiple-Quantum NMR Studies on Molecular Mixtures; 1. Introduction; 2. Fundamentals of Homonuclear MQ-NMR; 2.1. Efficiency; 2.2. Relay Peaks; 2.3. Specificity of the Highest Possible Coherence Order for a Given Spin System; 3. MQ Spectroscopy for Mixture Analysis; 3.1. DQS Analysis of Mixtures; 3.2. The MaxQ Approach; 4. Analytical Applications of the MaxQ Principle; 4.1. Characterization of Polyphenolics in Natural Substances; 4.2. Quantitative Analysis Using MaxQ Spectroscopy
5. Acceleration of MQ Experiments5.1. Ultrafast DQ Spectroscopy; 5.2. Nonuniform Sampling; 6. Conjugating MQ and NMR Diffusometry; 7. Conclusions; References; Chapter Two: Recent NMR Studies of Thermotropic Liquid Crystals; 1. Introduction to Liquid Crystals; 2. Order Parameters and Mesophase Transitions; 2.1. Order Parameters of Board-Like (Sanidic) Molecules; 3. Effects of Applied External Fields; 3.1. Achiral V-Shaped Mesogens; 3.2. Helical Unwinding and Winding Transitions of Ferroelectric Liquid Crystals; 3.2.1. Angle-Dependent DNMR Study
3.2.2. Field Effects on Twist Grain Boundary Mesophases4. Diffusive Motions in Liquid Crystals; 5. Proton and Deuterium Spin Relaxation Studies; 5.1. Calamitic and Chromonic Mesogens; 5.2. Bent-Core and Dendritic Mesogens; 6. Studies of Order and Structure; 6.1. Calamitics and Hydrogen-Bonded Mesogens; 6.2. V-Shaped Mesogens; 6.2.1. Conformational Problem of BCMs: A Case Study; 6.3. Discotic Mesogens; 6.4. Polymeric Liquid Crystals and LC Elastomers; 7. Studies of Oriented Solutes; 7.1. NMR of Rigid Solutes; 7.2. NMR of Flexible Alkanes; 8. NMR Studies of LC Confined Systems
9. Summary and OutlookReferences; Chapter Three: Recent Advances in 14N Solid-State NMR; 1. Introduction; 2. Preliminary Background on 14N Solid-State NMR; 2.1. Quadrupolar Coupling; 2.2. Chemical Shift; 2.3. Spin-Spin Couplings; 3. Advances in 14N Solid-State NMR Methods; 3.1. Excited and Observed Transitions; 3.2. Direct Detection Methods; 3.2.1. Recent Advances in Wideline Acquisition; 3.2.2. MAS Improvements; 3.2.3. The Renewed Overtone Approach; 3.2.4. New Polarization Transfer Methods; 3.3. Indirect Detection Methods; 3.3.1. Dipolar Recoupling Sequences
3.3.2. Heteronuclear 14N-X Correlations4. Modeling of Structures and Dynamics; 4.1. Ab Initio Calculations of EFG; 4.1.1. Choice of Geometrical Parameters, Basis Sets, and Exchange-Correlation Functionals; 4.1.2. Correction for London Dispersion Energy; 4.2. Molecular Dynamics; 4.2.1. Simulations from Static EFG Tensor; 4.2.2. Simulations from Dynamically Averaged EFG Tensor; 5. 14N NMR Characterization Studies; 5.1. Inorganic and Hybrid Organic-Inorganic Materials; 5.1.1. Nitrides; 5.1.2. Nitrates; 5.1.3. Ammonium and Ammonia Containing Compounds; 5.1.4. Tetra-n-Alkylammonium Cations
Síntesis:
Annual Reports on NMR Spectroscopy provides a thorough and in-depth accounting of the progress made in nuclear magnetic resonance (NMR) spectroscopy and its many applications. Nuclear magnetic resonance (NMR) is an analytical tool used by chemists and physicists to study the structure and dynamics of molecules. In recent years, no other technique has gained as much significance as NMR spectroscopy. It is used in all branches of science in which precise structural determination is required, and in which the nature of interactions and reactions in solution is being studied. Annual Reports on NMR Spectroscopy has established itself as a premier resource for both specialists and non-specialists alike who want to become familiar with the new techniques and applications of NMR spectroscopy.
Nota local:
Elsevier
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