Nuclear Magnetic Resonance ANIMATED ILLUSTRATIONS MS Powerpoint Presentation

Nuclear Magnetic Resonance ANIMATED ILLUSTRATIONS MS Powerpoint Presentation Files Uses Animation Schemes as available in MS XP or MS 2003 versions A class room educational material File-4 Principles of NMR signal detection: NMR Spectrum http: //ugc-inno-nehu. com/links_from_web. html

Oscillation Level reduced when there is ESR absorption Oscillation Level at fixed frequency ‘ν’ When No ESR Detected DC Level No ESR 2 Oscillator Φ Oscillation Level Detector 1 Reduced DC On ESR Absorption Shifter hν=gβH No oscillations 0 The role of a phase Φ shifter in the diagram would be explained in the succeeding slides If the Current is increased from 0 to beyond resonance field, then, the field [ Ht ] increases with time and causes resonance at resonance field value Ht hν=gβH 2 Current Source CLICK to transit to next slide 1

Z - Magnetization along the Field XY - Magnetization induces RF signal in the receiver coil Z Defocusing and signal decay Y X Output from receiver coil - FID RF Pulse : π/2 pulse to flips the magnetization into xy plane CW Oscillator GATE Receiverdetector RF Pulse DC Pulse generator Probe In Magnet Display Monitor Recorder

Real imaginary OUTPUT from the FFT Program: Time domain FID and the Frequency domain two line NMR spectrum

Spectrometer operating frequency decreases Distance of separation between the multiplets varies with the field Field= H Separation within the multiplets remain unchanged with the field H/2 H/4 H/6. 6