Measured Electron Spin Relaxation Rates in Frozen Solutions of Azurin, Vitamin-B12r, and Nitrosyl Ferrous Myoglobin
Rates in frozen glycerin/water solutions at temperatures between 1.4 K and 20 K are reported for a copper-containing protein, azurin, and a cobalt-containing biomolecular complex, vitamin B$\sb{\rm 12r}$, the paramagnetic product of the photolysis of coenzyme B$\sb $. Results are interpreted in terms of a spectral dimensionality. Rates are also reported for nitrosyl ferrous myoglobin in frozen water solution, which exhibits a dominant one-phonon relaxation process up to 20 K and thus does not reveal spectral dimensionality.
University of Illinois - Urbana-Champaign
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University of Illinois at Urbana-Champaign