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B 0. B 0. B 0. B 0 ´. B 0. http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-nmr-1.html. m I :. L z (+1/2). E. S L z (+1/2). M z = S L z. L Z. +1/2. -1/2. +. 0. -. L Z. -1/2. +1/2. S L z (-1/2). L z (-1/2). B/z. L. Um NMR tæknina.

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B 0

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  1. B0 B0

  2. B0 B0´

  3. B0 http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-nmr-1.html

  4. mI : Lz(+1/2) E SLz(+1/2) Mz =SLz LZ +1/2 -1/2 + 0 - LZ -1/2 +1/2 SLz(-1/2) Lz(-1/2) B/z L

  5. Um NMR tæknina • Byggir á orkumun mismunandi spunaástanda kjarna með segulvægi í álögðu segulsviði

  6. Um NMR tæknina • Örlítið fleiri kjarnar eru í orkulægra ástandinu við stofuhita

  7. x

  8. + + + + x BR B BL

  9. + + + + x B BL BR BL BR

  10. + + + + x B BL BL BR BR

  11. + + + + x B BL BR BL BR

  12. + + + + x BR

  13. + + + + x BR

  14. + + + + x BR

  15. B/z L BR hn / x

  16. B/z L hn / x

  17. B/z L hn / x

  18. B/z Mz =SLz hn / x

  19. B/z Mz =SLz Mxy =SLxy hn / x y i

  20. B/z Mz =SLz Mxy =SLxy hn / x y i

  21. My Mx y Mxy hn / x

  22. y My hn / x

  23. y My hn / x

  24. Current / i time y My hn / x

  25. y My hn / x

  26. B/z Mz =SLz Mxy =SLxy hn / x y i

  27. B/z Mz =SLz hn / x y

  28. Current / i time y My hn / x

  29. Áhrif álagðs segulsviðs á kjarnspuna /effect of outer magnetic field (z-axis): Z-as

  30. X-ás Áhrif rafsegulbylgju- reislunar á kjarnspuna í segulsviði / Effect of radiowave radiation(x-axis)

  31. B0 http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-nmr-1.html

  32. (gleypni)skynjun í NMR /detection (y-axis) : Y-ás

  33. FT greining NMR róf er fengið með fourier greiningu á tímaháðu mæli- merki. Þannig fæst magn tíðniþátta sem fall af tíðni = NMR róf / Effect of fourier transformation

  34. “Effective” effect of pulse radiation along x-axis:

  35. Toppur NMR litrófs- Toppur /NMR band peak

  36. Áhrif fjórpólskúplunar / quadrupole coupling effect: Fjórp.

  37. Hraðafr. Hraði Snúnings um efnatengi skv. NMR / Rate of chemical bond rotation

  38. C5H10SiHCF3(eq) C5H10SiHCF3 (ax)

  39. C5H11SiF(ax) = C5H11SiF(eq)

  40. Ákvörðun á T1:/ T1 determination T1

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