Question

Is 1H NMR a form of spectroscopy? Explain.

Answer 1

1H NMR, which is a Nuclear Magnetic Resonance is a spectroscopy method used to characterise atomic nuclei.

The nuclei should be magnetically active, and the mainly used reference atoms are hydrogen and carbon-13.

If hydrogen is used, it is 1H NMR.

A magnetic field is applied to the sample and radio waves are made to fall on the smaple at different frequencies.

If some atom is present with the resonant frequency equal to the applied frequency, there will be a resonance and a high signal is obtained.

In an NMR data, there will be peaks corresponding to each atomic nuclei, and the number of each atom can be found out in the sample, with its chemical structure.

For 1H at 1 Tesla magnetic field, the resonant frequency is 900 MHz. (This is often taken as reference)