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Virtual Chemistry Experiments

NMR Spectroscopy

Topic Concepts Experiment
Larmor Precession Nuclear spin and Larmor precession are defined and explained. Larmor precession is illustrated.
Bulk Magnetization The Larmor frequency and measurement of the precession of the bulk magnetization are explained. Precession of the bulk magnetization is illustrated, and the Larmor frequency is measured.
The Rotating Frame Trigonometric functions are used to compare the real and rotating frames of reference. The chemical shift is determined from measurements in the rotating frame.
Bloch Equations The relaxation of the bulk magnetization to its equilibrium value is described. The dependence of the free induction decay on precession frequency, T1, and T2 are explored.
Single-Pulse Experiment The use of radiofrequency pulses to manipulate the bulk magnetization is described. The simulation steps through the steps in the basic NMR experiment.
The NMR Spectrum The conversion of the FID to a spectrum is described. The NMR spectrum for a multicomponent sample is measured.
Phasing the NMR Spectrum The phasing step in processing an NMR spectrum is explained. The origin of the phase angle is examined and an NMR spectrum is phased.
Inversion Recovery Experiment The inversion recovery experiment is illustrated. The inversion recovery experiment is used to determine T1.
Spin Echo Experiment The spin echo experiment is illustrated. The spin echo experiment is used to determine T2.

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© Copyright 2013, David N. Blauch
Last updated Wednesday April 23 2014