Shielding and spin-spin coupling cause subtle changes in the readout, which is used to identify of organic molecules.
Paramagnetic materials show a change in frequency in this technique named for Walter Knight. The strength of dipolar interactions in this technique is proportional to 3 cos squared theta minus 1, meaning that interaction is zero at 54.7 degrees. Samples in this technique are placed into a borosilicate tube of 5 mm diameter, and this technique uses deuterated solvents in order to cut down on background. The outputs in this technique are equal to the difference in absorption frequency relative to a reference divided by the operating frequency. This technique relies on splitting the spin states of a nucleus and applying a field at the energy difference between them. Shielding and spin-spin coupling cause subtle changes in the readout, which is used to identify of organic molecules. For 10 points, name this form of spectroscopy which applies a strong magnetic field to a sample.
Paramagnetic materials show a change in frequency in this technique named for Walter Knight.
Nuclear Magnetic Resonance or NMR 