Foerster mechanism

Theory of excited state interactions informs that singlet energy transfer could proceed over a distance of 10 -lO A via long range dipole-dipole interaction(Foerster mechanism, the rate is given by eq.(l) or (2)), whereas triplet... 

Raju S. Dave, Morrison Foerster, 2000 Pennsylvania Avenue NW, Washington, DC 20006-1888, USA Alfred C. Loos, Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA... 

BDD anodes without impurities are not electrocatalytically active because water electrolysis is characterised by the formation of OH radicals (Marselli et al. 2003), ozone (Cho et al. 2005) and hydrogen peroxide (Drogui et al. 2001). One can conclude from radical chemistry that other radicals have to be expected in the anodic reaction layer and, maybe, in the bulk. Foerster and co-workers compared active chlorine formation on Pt and BDD anodes (Foerster et al. 2002). Formation of active chlorine was explained by a mechanism involving the formation of Cl radicals (Ferro et al. 2000) ... 

Lubitz W, Brecht M, Foerster S, van Gastel M, Stein M. 2003. EPR and ENDOR studies of [NiFe] hydrogenase contributions to understanding the mechanism of biological hydrogen conversion. ACSSymp Ser 858 128-150. 

Foerster S. 2003. EPR spectroscopic investigation of the active site of [NiFe]-hydrogenase a contribution to the elucidation of the reaction mechanism. PhD dissertation, Technische Universitat Berlin. 

The critical perturbation predicted by the reaction-diffusion equations with the shortest recurrence time occurs when [Br ] fluctuates from its steady state value to [Br ]g within a sphere of radius 0.5 fim in an excitable system. In the experiments of Foerster et al. [8] and of Showalter et al. [5], the mechanism by which chemical waves are induced consists of depletion of bromide ions as well. In both the experiments of Foerster et al. and of Showalter et al., the bromide concentration is presumably reduced to at least [Br ] due to the silver ions released in solution. The region in which the bromide is depleted to its critical concentration is estimated to be about 5 /xm surrounding a capillary 16 fim in radius in the experiments of Foerster et al. and a minimum of 2 /xm surrounding an electrode 150 /xm in radius in the experiments of Showalter et al. Both of these volumes necessary to perturb for wave initiation are larger than the volume of a sphere of radius 0.5 /xm which has the minimum recurrence time for the calculations of the deterministic equations. Hence, the recurrence time for a fluctuation to induce a concentration change in these larger volumes would be larger than the minimum calculated recurrence time of 10 seconds. 

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