A new method for obtaining isotopic fractionation data at multiple sites in rapidly exchanging systems
RM Jarret, M Saunders
Index: Jarret, Ronald M.; Saunders, Martin Journal of the American Chemical Society, 1985 , vol. 107, # 9 p. 2648 - 2654
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Citation Number: 45
Abstract
Conclusions The data presented in this paper show that the S2 state EPR signals from the OEC arise from the interaction of more than one paramagnetic site. However, our temperature dependence data cannot be accounted for by a simple Mn dimer model, unless such a dimer arises from a ferromagnetic exchange coupling of low-spin forms of Mn. As noted above, low-spin Mn complexes are rare and not likely to be present in the OEC. A ...