.. _sphx_glr_api_gallery_photochem_electron_transfer:

Photoinduced electron transfer
--------------------------------

Fluorescence quenching by electron transfer, and the Rehm-Weller relation
between quenching rate and electron-transfer free energy.


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  <div id='sg-tag-list' class='sphx-glr-tag-list'></div>


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    <div class="sphx-glr-thumbnails">

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    <div class="sphx-glr-thumbcontainer" tooltip="Rehm and Weller (1970) measured how fast many donor-acceptor pairs quench fluorescence by electron transfer in acetonitrile and found that the quenching rate constant depends on a single quantity, the electron-transfer free energy \Delta G_{ET}=E_{ox}(D)-E_{red}(A)-E_{00}+w (~chemistrykit.photochem.rehm_weller_free_energy). Their empirical curve (~chemistrykit.photochem.rehm_weller_quenching_rate) is diffusion-limited for exergonic transfer and falls off exponentially for endergonic transfer; it does not show the Marcus inverted region at very negative \Delta G_{ET}.">

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  .. image:: /api/gallery/photochem/electron_transfer/images/thumb/sphx_glr_plot_01_rehm_weller_quenching_thumb.png
    :alt:

  :doc:`/api/gallery/photochem/electron_transfer/plot_01_rehm_weller_quenching`

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      <div class="sphx-glr-thumbnail-title">Rehm-Weller equation: electron-transfer quenching vs. driving force</div>
    </div>


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    </div>


.. toctree::
   :hidden:

   /api/gallery/photochem/electron_transfer/plot_01_rehm_weller_quenching