Transcription of NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY
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NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY
NMR SPECTROSCOPY 1. NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY . Involves interaction of materials with the low-energy radiowave region of the electromagnetic spectrum Origin of Spectra Theory All nuclei possess charge and mass. However, those with either an odd mass number or an odd atomic number also possess spin and have angular momentum. 1 2 13 14 17 19 31. examples H H C N O F P possess spin 1 1 6 7 8 9 15. 12 16. but 6. C. 8. O do not A nucleus with spin can be detected by NUCLEAR MAGNETIC RESONANCE aligned against field (nmr) SPECTROSCOPY . ENERGY. = h . A spinning nucleus such as 1H. behaves as a spinning charge and aligned with field Knockhardy Publishing generates a MAGNETIC field. It can be likened to a bar magnet. When placed in an externally applied field it can align with, or against, the field. The energy difference between the two states ( ) depends on the applied field. The sample is place d in the field of a large electromagnet and a radio- frequency (RF) field is applied.
NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Involves interaction of materials with the low-energy radiowave region of the electromagnetic spectrum Origin of Spectra Theory All nuclei possess charge and mass.
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