High Resolution NMR in Solids Selective Averaging: Supplement 1 Advances in Magnetic ResonanceElsevier, 2 de dez. de 2012 - 204 páginas High Resolution NMR in Solids: Selective Averaging presents the principles and applications of the four approaches to high resolution NMR in solids — magic-angle sample spinning, multiple-pulse, proton-enhanced nuclear induction, and indirect detection methods. Divided into six chapters, this book initially describes the tensorial properties of nuclear spin interactions in both ordinary and spin spaces. It then deals with the manifestations of nuclear magnetic shielding in NMR spectra of both single-crystal and powder samples, and then discusses the techniques for analyzing spectra and rotation patterns in terms of shielding tensors. A wide range of NMR phenomena that are result of intentional or natural, selective or unselective averaging processes and the average Hamiltonian theory that yields the inclusion of correction are covered. This book also provides a detailed discussion on multiple-pulse sequences intended for high resolution NMR in solids. The concluding chapter examines the applications of multiple-pulse techniques, with particular emphasis on measurements of 19F and 1H shielding tensors. Discussions on rotations of angular momentum operators; time ordering and the Magnus expansion; off-resonance averaging of the second-order dipolar Hamiltonian; and phase transients are covered in the supplemental texts. |
Conteúdo
| 1 | |
| 5 | |
Chapter III Manifestations of Nuclear Magnetic Shielding in NMR Spectra of Solids | 17 |
Chapter IV Averaging in Ordinary Coordinate and Spin Spaces | 37 |
Chapter V Detailed Discussion of MultiplePulse Sequences Intended for HighResolution NMR in Solids | 91 |
Chapter VI Applications of MultiplePulse Techniques | 137 |
Rotations of Angular Momentum Operators | 171 |
Time Ordering and the Magnus Expansion | 173 |
OffResonance Averaging of the SecondOrder Dipolar Hamiltonian | 181 |
Phase Transients | 183 |
| 187 | |
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Termos e frases comuns
anisotropy applied field average Hamiltonian axes axially symmetric axis CaF2 Chem chemical shifts coefficients correction terms cos² decoupling density matrix Euler angles experimental ferrocene flip angle errors frequency H₁ Haeberlen high-resolution NMR Hint hydrogen bonds I-spin interactions internal Hamiltonians isotropic J. S. Waugh linewidth magic-angle magnetic field maleic acid malonic acid molecular molecular symmetry molecules motions MREV eight-pulse MREV sequence multiple-pulse sequences NMR in solids NMR signal nuclear magnetic nuclear spin nuclei off-resonance averaging orientation parameters perpendicular phase transients Phys proton proton shielding pulse imperfections pulse sequence resolution rf field rf inhomogeneity rotating frame sample spinning secular self-decoupling shielded direction shielding tensors sin² single crystal spectrum spin frame spin space spin system spin-spin spin-spin coupling subcycle T₁ toggling frame tonian tw/t Urf(t vanishes w₁ WAHUHA experiment WAHUHA sequence width wref Δω
