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Relaxation

Relaxation. Spin lattice Spin-spin. Relaxation times. Relaxation mechanisms. Dipole-dipole Spin-rotation Anisotropy Scalar coupling constants Paramagnetic molecules Quadrupolar nuclei. Inversion recovery experiment. Inversion recovery experiment. Relaxaton times of H 1.

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Relaxation

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  1. Relaxation • Spin lattice • Spin-spin Department of Science, systems and Models

  2. Relaxation times Department of Science, systems and Models

  3. Relaxation mechanisms • Dipole-dipole • Spin-rotation • Anisotropy • Scalar coupling constants • Paramagnetic molecules • Quadrupolar nuclei Department of Science, systems and Models

  4. Inversion recovery experiment Department of Science, systems and Models

  5. Inversion recovery experiment Department of Science, systems and Models

  6. Relaxaton times of H1 Department of Science, systems and Models

  7. T1 relaxation times of toluene Department of Science, systems and Models

  8. Decoupling • Decoupling=multiple resonance Department of Science, systems and Models

  9. Decoupling of 14N Department of Science, systems and Models

  10. Decoupling Department of Science, systems and Models

  11. Department of Science, systems and Models

  12. Department of Science, systems and Models

  13. Ammonium ion Department of Science, systems and Models

  14. 14N NMR spectrum of partially deuteriated ammonium ions Department of Science, systems and Models

  15. Off-resonance decoupling Department of Science, systems and Models

  16. Diff NOE Department of Science, systems and Models

  17. Spin-echo experiment with heteronuclear coupling Department of Science, systems and Models

  18. NOE effect Department of Science, systems and Models

  19. Overhauser effect h = girr/gobs(W2-W0/W0+2W1+W2) Department of Science, systems and Models

  20. Department of Science, systems and Models

  21. No NOE !!!! • Negative gamma • Intermediate molecular size Department of Science, systems and Models

  22. Decoupling schemes Department of Science, systems and Models

  23. NOE effects Department of Science, systems and Models

  24. Three-spin effect Department of Science, systems and Models

  25. Spin echo experiment (remove inhomogeneity) Department of Science, systems and Models

  26. Red blood cells (erythrocytes) Department of Science, systems and Models

  27. Department of Science, systems and Models

  28. Hydrolysis of aspirin Department of Science, systems and Models

  29. NMR spectrum of asprin in blood Department of Science, systems and Models

  30. Cultured astrocytes Department of Science, systems and Models

  31. Conversion of acetaldehyde in astrocytes Acetaldehyde Acetic acid Department of Science, systems and Models

  32. Spectral editing Department of Science, systems and Models

  33. CH and CH2 Department of Science, systems and Models

  34. Attached proton test (APT) for cholesteryl acetate Department of Science, systems and Models

  35. Inadequate Department of Science, systems and Models

  36. Phase cycling inversion recovery Department of Science, systems and Models

  37. Spin-echo experiment with heteronuclear coupling Department of Science, systems and Models

  38. Composite pulse Department of Science, systems and Models

  39. Shaped pulses Department of Science, systems and Models

  40. Text for tomorrow Chapter 6 • Problems for tomorrow • Handouts problems 8.3 and 8.4 Department of Science, systems and Models

  41. Department of Science, systems and Models

  42. Department of Science, systems and Models

  43. Department of Science, systems and Models

  44. Department of Science, systems and Models

  45. 2D NMR • The gateway to assignment and structure determination of biological molecules Department of Science, systems and Models

  46. Nomenclature Department of Science, systems and Models

  47. COSY pulse sequence Department of Science, systems and Models

  48. COSY experiment Department of Science, systems and Models

  49. Department of Science, systems and Models

  50. Department of Science, systems and Models

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