Theoretical introduction to Nuclear Magnetic Resonance

This is a brief description about spectroscopy by Nuclear Magnetic Resonance intended to extend the basis of this technique not explained in the introductory chapter of my PhD Thesis. NMR is a powerful and harmless tool used for biophysical characterization of molecules with atomic resolution. Nuclear magnetic resonance (NMR) spectroscopy is a technique that takes advantage of the quantum mechanical properties of the atomic nucleus known as spin. Nuclei with spin quantum numbers different to zero behave with a finite charge distribution, thus having a magnetic moment proportional and parallel to the nuclear spin. These nuclei act like tiny magnets (dipoles) and can be, in principle, detected by NMR.  When a sample is placed in a stationary magnetic field (B0), its NMR active nuclei tend to align parallel or antiparallel with that external field. The dipoles oriented against the B0 are in a less stable state and are present at a […]

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