Previous attempts to interpret the time-resolved electron paramagnetic resonance spectra of photosynthetic bacteria have been based on the premise that electron spin polarization arises in the primary radical pair (P+I-) formed by photoinduced charge separation. The observed spectrum is assumed to b
Electron spin resonance of spin-correlated radical pairs
โ Scribed by C.D. Buckley; D.A. Hunter; P.J. Hore; K.A. McLauchlan
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 484 KB
- Volume
- 135
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Shortly after their formation, transient free radicals trapped in micelles exhibit electron spin resonance (ESR) spectra with "antiphase" lineshapes, i.e. lines with their low-field halves in emission and high-field halves in absorption. It is demonstrated that this hitherto unexplained effect is consistent with the detection of ESR transitions in geminate radical pairs before the radicals have had time to diffuse apart.
๐ SIMILAR VOLUMES
The antiphase structure (APS) of CIDEP spectra of spin correlated radical pairs in viscous liquids is investigated theoretically in a free diffusion model for relative motion of radicals. A very simple and accurate formula for relative APS amplitude is derived. This formula predicts a very small AP
Hore and McLauchlan that shortly after their formation geminate isopropylketyl radicals in isopropanol at law temperature ( ~200 K) exhibit ESR spectra with "antiphase" lineshape, i.e. lines with their low-field halves in emission and high-field halves in absorption. It is shown that a theory which