ElectronParamagneticResonance(EPR)ElectronSpinResonance(ESR)

2020-09-02 16:05  下载量：0

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Electron paramagnetic resonance (EPR)/electron spin resonance (ESR) is an important method to study unpaired electrons in organic and inorganic radicals, transition metal complexes, and some biomolecules.When paramagnetic compounds with unpaired electron spins are under magnetic fields and electromagnetic waves, normally in the microwave range of frequency, the transition between spin states is induced. The measurement is generally carried out with constant frequency, while the magnetic field varies. EPR/ESR spectrometer measures the absorption of electromagnetic radiation. Due to the short relaxation times of electron spins, EPR/ESR must be performed at cryogenic temperatures.

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