electron spin resonance (ESR)

electron spin resonance (ESR)

Technique of spectroscopic analysis (see spectroscopy) used to identify paramagnetic substances (see paramagnetism) and investigate the nature of the bonding within molecules by identifying unpaired electrons and their interaction with their immediate surroundings.

Unpaired electrons, because of their spin, behave like tiny magnets and can be lined up in an applied magnetic field; energy applied by alternating microwave radiation is absorbed when its frequency coincides with that of precession of the electron magnets in the sample. The graph or spectrum of radiation absorbed as the field changes gives information valuable in chemistry, biology, and medicine.

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Universalium. 2010.

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  • electron-spin resonance spectroscopy — elektronų sukininio rezonanso spektroskopija statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiagų spektroskopija, pagrįsta elektronų sukininio rezonanso reiškiniu. atitikmenys: angl. electron spin resonance spectroscopy; ESR… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • electron spin resonance method — sukininio elektronų rezonanso metodas statusas T sritis fizika atitikmenys: angl. electron spin resonance method; ESR method vok. Elektronenresonanzmethode, f; Elektronenspinresonanzmethode, f; ESR Methode, f rus. метод электронного спинового… …   Fizikos terminų žodynas

  • electron spin resonance — Physics. the flipping back and forth between two spin directions of electrons in a magnetic field when electromagnetic radiation of the proper frequency is applied. Abbr.: ESR Also called electron paramagnetic resonance, spin resonance. [1950 55] …   Universalium

  • electron spin resonance — noun → electron paramagnetic resonance. Abbrev.: ESR …  

  • electron spin resonance — noun microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet • Syn: ↑ESR, ↑electron paramagnetic resonance • Hypernyms: ↑microwave spectroscopy …   Useful english dictionary

  • Electron paramagnetic resonance — (EPR) or electron spin resonance (ESR) spectroscopy is a technique for studying chemical species that have one or more unpaired electrons, such as organic and inorganic free radicals or inorganic complexes possessing a transition metal ion. The… …   Wikipedia

  • Electron Magnetic Resonance — (EMR) refers to electron spin resonance (ESR) and electron paramagnetic resonance (EPR) …   Wikipedia

  • electron paramagnetic resonance — ▪ physics also called  electron spin resonance (ESR)        selective absorption of weak radio frequency electromagnetic radiation (in the microwave region) by unpaired electrons in the atomic structure of certain materials that simultaneously… …   Universalium

  • electron paramagnetic resonance — noun microwave spectroscopy in which there is resonant absorption of radiation by a paramagnet • Syn: ↑electron spin resonance, ↑ESR • Hypernyms: ↑microwave spectroscopy * * * noun : electron spin resonance he …   Useful english dictionary

  • electron paramagnetic resonance — (= EPR; electron spin resonance; ESR) Form of spectroscopy in which the absorption of microwave energy by a specimen in a strong magnetic field is used to study atoms or molecules with unpaired electrons …   Dictionary of molecular biology

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