The detected signal in NMR is due to non. radiative relacation od the excited state.

NMR is based on detecting the rediofrequency emitted when protons in the nuclei in an excited energy level return to the ground state

The perturbation of nuclear spins can be detected only because an intense magnetic field first aligns their magnetic vectors.

Only nuclei with half integer spin, such as H, C, P are active in NMR

NMR provides information about the structure or a molecule (relative arrangements of functional groups) that is not provided by any other spectroscopy techniques

Compesating for peak broadening of solids is so hard that it needs magic

Magnetic materials in the sample holder are desiirable, to help with shielding effects

Magic angle spinning eliminates chemical shift anisotropies due to differences in molecule orientations in the solid state

The magic angle by itself comppesates for magnetic field anisotropies

The desired effect happes in a very narrow angle for spinning (around 54.7°)

Magic angle spinning can increase the resolution of solid state NMR by reducing peak broading

Different sample probes are required for analyzing different nuclei and for performing specific experimental measurements (e.g. decoupling, magic angle spinning)

Functional groups can be idetified because they have different chemical shift

The splitting (or partition) pattern of a peak does not provide information about the structure of the molecule

Spinning of the sample inside the NMR is requires to compasate for magnetic field inhomogeneities

The sample is subjected to sets of very short pulses (mius) for excitation, then allowed to relax back to its initial state for a few seconds.

Fourier Transform ir not necessary in signal processing of NMR

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