Dexter electron transfer

This short range energy transfer process was first theoretically proposed by D. L. Dexter in 1953.[5]

The Dexter energy transfer rate, ${\displaystyle k_{ET}}$, is indicated by the proportionality

${\displaystyle k_{ET}\varpropto J\mathrm {exp} \left[{\frac {-2r}{L}}\right]}$

where ${\displaystyle r}$ is the separation of the donor from the acceptor, ${\displaystyle L}$ is the sum of the Van der Waals radii of the donor and the acceptor, and ${\displaystyle J}$ is the spectral overlap integral defined by

${\displaystyle J=\int f_{\rm {D}}(\lambda )\,\epsilon _{\rm {A}}(\lambda )\,\lambda ^{4}\,d\lambda }$

• Fluorescence
• Quenching
• Förster resonance energy transfer
• Surface energy transfer