Hopfield J J
Department of Physics, Princeton University, Princeton, New Jersey 08540.
Proc Natl Acad Sci U S A. 1974 Sep;71(9):3640-4. doi: 10.1073/pnas.71.9.3640.
A theory of electron transfer between two fixed sites by tunneling is developed. Vibronic coupling in the individual molecules produces an activation energy to transfer at high temperatures, and temperature-independent tunneling (when energetically allowed) at low temperature. The model is compared with known results on electron transfer in Chromatium and in Rhodopseudomonas spheroides. It quantitatively interprets these results, with parameters whose scale is verified by comparison with optical absorption spectra. According to this description, the separation between linking sites for electron transfer is 8-10 A in Chromatium, far smaller than earlier estimates.
本文提出了一种通过隧穿实现两个固定位点之间电子转移的理论。单个分子中的电子振动耦合在高温下产生转移的活化能，在低温下产生与温度无关的隧穿（当能量允许时）。该模型与嗜铬菌属和球形红假单胞菌中电子转移的已知结果进行了比较。它通过与光吸收光谱比较来验证参数的尺度，从而定量地解释了这些结果。根据这一描述，嗜铬菌属中电子转移连接位点之间的间距为8 - 10埃，远比早期估计的要小。
