An extended model for electron spin polarization in photosynthetic bacteria

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:6178504

Morris, A L; Norris, J R ^[1]; Thurnauer, M C ^[2]

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1. Argonne National Lab., IL (USA) Chicago Univ., IL (USA). Dept. of Chemistry
2. Argonne National Lab., IL (USA)

We have developed a general model for electron spin polarization which includes contributions from both CIDEP (chemically induced dynamic electron polarization) and CRP (correlated radical polarization). In this paper, we apply this model to sequential electron transfer in photosynthetic bacteria. Our model calculates the density matrix for the P{sup +}I{sup {minus}} radical pair and transfers the polarization as it develops to the P{sup +}Q{sup {minus}} radical pair. We illustrate several possible cases. One case is equivalent to CIDEP; no interactions are included on the secondary radical pair, P{sup +}Q{sup {minus}}. Another approximates CRPP by either increasing the transfer rate from P{sup +}I{sup {minus}} to P{sup +}Q{sup {minus}} or restricting interactions to the secondary radical pair, P{sup +}Q{sup {minus}}. Others allow interactions on both the primary and secondary radical pairs with various transfer rates. 15 refs., 4 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6178504
• Report Number(s): CONF-9003209-2; ON: DE91006091
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ENERGY LEVELS
EXCITED STATES
ION PAIRS
MAGNETIC RESONANCE
MATHEMATICAL MODELS
PHOTOSYNTHETIC BACTERIA
PHOTOSYNTHETIC REACTION CENTERS
POLARIZATION
RADIATIONS
RADICALS
RESONANCE
VISIBLE RADIATION