23/07/2025
Nuclear Magnetic Resonance
The principal of NMR (Nuclear Magnetic Resonance) is based on the magnetic properties of certain atomic nuclei. Here's a simplified explanation:
đŦ Basic Principle of NMR
Nuclear Magnetic Resonance (NMR) works on the principle that:
Certain atomic nuclei (like šH, šÂŗC) behave like tiny magnets and can absorb radiofrequency (RF) radiation when placed in a strong magnetic field.
𧲠How It Works (Step by Step)
Magnetic Field Application:
When a sample is placed in a strong external magnetic field (Bâ), the nuclei align either with or against the field.
These alignments correspond to different energy levels (parallel = lower energy; antiparallel = higher energy).
Resonance:
When radiofrequency (RF) energy is applied, nuclei can absorb this energy and jump from lower to higher energy statesâthis is resonance.
Relaxation & Signal Detection:
After absorbing energy, the nuclei relax back to the lower energy state, releasing RF energy.
This emitted energy is detected and transformed into a signal called the Free Induction Decay (FID).
Fourier Transformation (FT):
The FID is converted into a spectrum using Fourier Transform, giving NMR spectra that show chemical environments
