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Multiple-quantum EPR coherence in a spin-correlated radical pair system

✍ Scribed by Jau Tang; James R. Norris

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
497 KB
Volume
233
Category
Article
ISSN
0009-2614

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✦ Synopsis

Multiple-quantum EPR coherence phenomena in a photo-induced spin-correlated radical pair system are examined. Because of the special singlet-triplet mixing mechanism, we have proposed a phase-cycled two-pulse sequence to excite and detect the single-quantum as well as the normally forbidden zero-and double-quantum transitions. Complementary to the method of electron spin echo modulation, this technique can also provide useful structural information about electron-electron exchange and dipolar interactions, in addition to the Zeeman and nuclear hyperfine interactions. Analytical expressions are derived for the multiple-quantum signals.

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