Abstract
An upper limit for the extinction coefficient of the charge transfer band in the ferrohexacyanide-ferricytochrome c redox couple has been determined from 800 to 1800 nm. We obtain ε≤0.003 M-1 cm-1 between 800-1400 nm, ε≤0.02 M-1 cm-1 between 1400-1800 nm. Prompt transfer of charge due to excitation in the heme absorption bands occurs with a quantum yield of approximately 10-4. Simple vibronically assisted tunneling theories and appropriate choice of highly localized wave functions have been used to show that tunneling theory can give a reasonable fit to all aspects of charge transfer between cytochrome c and iron hexacyanide, including the small value of the charge transfer band extinction coefficient.
Original language | English (US) |
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Pages (from-to) | 5272-5283 |
Number of pages | 12 |
Journal | The Journal of chemical physics |
Volume | 77 |
Issue number | 11 |
DOIs | |
State | Published - 1982 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
- Physical and Theoretical Chemistry