Understanding NMR spectroscopy:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Chichester
Wiley
2012
|
| Ausgabe: | 2. ed., reprinted |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis Klappentext |
| Beschreibung: | Hier auch später erschienene, unveränderte Nachdrucke |
| Beschreibung: | XIII, 511 S. graph. Darst. |
| ISBN: | 9780470746097 0470746092 9780470746080 0470746084 |
Internformat
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| 100 | 1 | |a Keeler, James |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Understanding NMR spectroscopy |c James Keeler |
| 250 | |a 2. ed., reprinted | ||
| 264 | 1 | |a Chichester |b Wiley |c 2012 | |
| 300 | |a XIII, 511 S. |b graph. Darst. | ||
| 336 | |b txt |2 rdacontent | ||
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Datensatz im Suchindex
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Contents Preface Preface to the first edition 1 What this book is about and who should read it 1.1 1.2 1.3 1.4 1.5 2 How this book is organized Scope and limitations Context and further reading On-line resources Abbreviations and acronyms Setting the scene 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 NMR frequencies and chemical shifts Linewidths, lineshapes and integrals Scalar coupling The basic NMR experiment Frequency, oscillations and rotations Photons Moving on Further reading Exercises Energy levels and NMR spectra 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 4 4.1 4.2 4.3 The problem with the energy level approach Introducing quantum mechanics The spectrum from one spin Writing the Hamiltonian in frequency units The energy levels for two coupled spins The spectrum from two coupled spins Three spins Summary Further reading Exercises The vector model The bulk magnetization Larmor precession Detection v vi 1 2 3 3 4 4 5 5 9 10 13 15 20 21 21 22 23 24 26 31 34 35 38 40 44 44 45 47 47 50 51
x 4.4 Pulses 52 4.5 On-resonance pulses Detection in the rotating frame 57 4.8 The basic pulse-acquire experiment Pulse calibration 60 61 4.9 The spin echo 63 4.10 Pulses of different phases 66 4.11 67 4.12 Off-resonance effects and soft pulses Moving on 4.13 Further reading 71 4.14 Exercises 72 4.6 4.7 5 Fourier transformation and data processing 60 71 77 5.1 How the Fourier transform works 78 5.2 Representing the FID 82 5.3 90 5.5 Lineshapes and phase Manipulating the FID and the spectrum Zero filling 5.6 Truncation 100 5.7 Further reading 101 5.8 Exercises 102 5.4 6 The quantum mechanics of one spin Summary Time evolution 117 RF pulses Making faster progress: the density operator 123 Coherence Further reading Exercises 134 Product operators 139 6.3 6.4 6.5 6.6 6.7 6.8 6.9 6.10 6.11 7.2 105 105 6.2 7.1 99 Introduction Superposition states Some quantum mechanical tools Computing the bulk magnetization 6.1 7 83 Operators for one spin Analysis of pulse sequences for a one-spin system 106 107 112 118 126 135 136 139 143 146 152 157 7.8 Speeding things up Operators for two spins In-phase and anti-phase terms Hamiltonians for two spins Notation for heteronuclear spin systems Spin echoes and J-modulation 7.9 Coherence transfer 166 7.3 7.4 7.5 7.6 7.7 149 157 158
7.10 The INEPT experiment 167 7.11 Selective COSY 171 7.12 7.13 Coherence order and multiple-quantum coherences Summary 173 178 7.14 Further reading 179 7.15 Exercises 180 8 Two-dimensional NMR 8.1 183 The general scheme for two-dimensional NMR 184 8.2 Modulation and lineshapes 187 8.3 8.4 COSY DQF COSY 190 200 8.5 Double-quantum spectroscopy 203 8.6 Heteronuclear correlation spectra 208 8.7 HSQC 209 8.8 HMQC 212 8.9 Long-range correlation: HMBC 215 8.10 HETCOR 220 8.11 TOCSY 221 8.12 8.13 Frequency discrimination and lineshapes Further reading 226 236 8.14 Exercises 238 9 Relaxation and the NOE 241 9.1 The origin of relaxation 242 9.2 Relaxation mechanisms 249 9.3 Describing random motion - the correlation time 251 9.4 Populations 258 9.5 Longitudinal relaxation behaviour of isolated spins 263 9.6 Longitudinal dipolar relaxation of two spins 267 9.7 The NOE 274 9.8 Transverse relaxation 286 9.9 Homogeneous and inhomogeneous broadening 300 9.10 Relaxation due to chemical shift anisotropy 304 9.11 Cross correlation 306 9.12 Summary 311 9.13 Further reading 311 9.14 Exercises 313 10 Advanced topics in two-dimensional NMR 319 10.1 Product operators for three spins 320 10.2 COSY for three spins 325 10.3 Reduced multiplets in COSY spectra 330 10.4 Polarization operators 337 10.5 ZCOSY 345
10.6 10.7 10.8 НМВС Sensitivity-enhanced experiments Constant time experiments 347 349 353 10.9 TROSY 10.10 Double-quantum spectroscopy of a three-spin system 10.11 Further reading 358 366 374 10.12 Exercises 376 11 Coherence selection: phase cycling and field gradient pulses 381 11.1 Coherence order 382 11.2 11.3 Coherence transfer pathways Frequency discrimination and lineshapes 387 389 11.4 The receiver phase 11.5 Introducing phase cycling 11.6 Some phase cycling ‘tricks’ 11.7 Axial peak suppression 11.8 CYCLOPS 11.9 Examples of practical phase cycles 11.10 Concluding remarks about phase cycling 11.11 Introducing field gradient pulses 11.12 Features of selection using gradients 11.13 Examples of using gradient pulses 11.14 Advantages and disadvantages of coherence selection with gradients 11.15 Suppression of zero-quantum coherence 11.16 Selective excitation with the aid of gradients 11.17 Further reading 11.18 Exercises 391 395 401 403 403 404 408 409 416 421 12 Equivalent spins and spin system analysis 441 426 426 432 435 436 12.1 12.2 12.3 12.4 12.5 Strong coupling in a two-spin system Chemical and magnetic equivalence Product operators for AX„ (l„S) spin systems Spin echoes in l„S spin systems INEPT in l„S spin systems 442 446 450 455 458 12.6 12.7 DEPT Spin system analysis 462 468 12.8 Further reading 477 12.9 Exercises 478 13 How the spectrometer works 433 13.1 The magnet 483 13.2 13.3 The probe The transmitter 485 486
13.4 13.5 13.6 The receiver Digitizing the signai Quadrature detection 488 489 491 13.7 The pulse programmer 493 13.8 Further reading 493 13.9 A Exercises Some mathematical topics 494 495 A.1 The exponential function and logarithms 495 A.2 A.3 Complex numbers Trigonometric identities 497 499 A.4 Further reading 500 index 501
This text is aimed at people who have some familiarity with high-resolution NMR and who wish to deepen their understanding of how NMR experiments actually 'work'. This revised and updated edition takes the same approach as the highly-acclaimed first edition. The text concentrates on the description of commonly-used experiments and explains in detail the theory behind how such experiments work. The quantum mechanical tools needed to analyse pulse sequences are introduced step-by-step, but the approach is relatively informal with the emphasis on obtaining a good understanding of how the experiments actually work. The use of two-colour printing and a new larger format improves the readability of the text. In addition, a number of new topics have been introduced: • How product operators can be extended to describe experiments in AX2 and AX3 spin systems, thus making it possible to discuss the important APT, INEPT and DEPT experiments often used in carbon-13 NMR. • Spin system analysis i.e. how shifts and couplings can be extracted from strongly-coupled (second-order) spectra, • How the presence of chemically equivalent spins leads to spectral features which are somewhat unusual and possibly misleading, even at high magnetic fields. • A discussion of chemical exchange effects has been introduced in order to help with the explanation of transverse relaxation. • The double-quantum spectroscopy of a three-spin system is now considered in more detail. |
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| physical | XIII, 511 S. graph. Darst. |
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| spelling | Keeler, James Verfasser aut Understanding NMR spectroscopy James Keeler 2. ed., reprinted Chichester Wiley 2012 XIII, 511 S. graph. Darst. txt rdacontent n rdamedia nc rdacarrier Hier auch später erschienene, unveränderte Nachdrucke Nuclear magnetic resonance spectroscopy Textbooks NMR-Spektroskopie (DE-588)4075421-2 gnd rswk-swf NMR-Spektroskopie (DE-588)4075421-2 s DE-604 Digitalisierung UB Regensburg - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=022531781&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis Digitalisierung UB Regensburg - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=022531781&sequence=000003&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA Klappentext |
| spellingShingle | Keeler, James Understanding NMR spectroscopy Nuclear magnetic resonance spectroscopy Textbooks NMR-Spektroskopie (DE-588)4075421-2 gnd |
| subject_GND | (DE-588)4075421-2 |
| title | Understanding NMR spectroscopy |
| title_auth | Understanding NMR spectroscopy |
| title_exact_search | Understanding NMR spectroscopy |
| title_full | Understanding NMR spectroscopy James Keeler |
| title_fullStr | Understanding NMR spectroscopy James Keeler |
| title_full_unstemmed | Understanding NMR spectroscopy James Keeler |
| title_short | Understanding NMR spectroscopy |
| title_sort | understanding nmr spectroscopy |
| topic | Nuclear magnetic resonance spectroscopy Textbooks NMR-Spektroskopie (DE-588)4075421-2 gnd |
| topic_facet | Nuclear magnetic resonance spectroscopy Textbooks NMR-Spektroskopie |
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