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Electron Paramagnetic Resonance EPR at X- and W-band Frequencies at the University of Alabama

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Electron Paramagnetic Resonance EPR at X- and W-band Frequencies at the University of Alabama

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    4. h? = g?Br Frequency EPR 103 > NMR (GHz vs MHz) Coupling EPR 106 > NMR (MHz vs Hz) Relaxation EPR 106 < NMR (ns vs ms) Sensitivity EPR 106 > NMR

    7. What kind of information can we extract from EPR spectrum?

    12. Why use higher frequencies? 95 GHz and > To increase sensitivity To improve g-tensor resolution

    13. To separate radicals with close g values:

    14. Why use pulse EPR? Structure and location of catalytically active species on high-surface area solids and within molecular sieves. Structural environment of Men+ centers - ESEEM Radicals and paramagnetic transient metal complexes in biological systems - pulse ENDOR NO-Fe2+ heme protein interactions - HYSCORE (to distinguish between pyrrole Ns and ligand Ns) Measuring spin-spin distances - DEER (protein labeling), out of phase ESEEM (photochemically generated radical paires, P?+700A?-1; P?+865Q?-A) Direct measuring of T1 and T2 relaxation times.

    16. Transient EPR of Light-Induced P700?+A1?- Radical Paires in Photosystem I

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