Jump to main content
Jump to site search

Issue 28, 2016
Previous Article Next Article

How fast is optically induced electron transfer in organic mixed valence systems?

Author affiliations

Abstract

The rate of thermally induced electron transfer in organic mixed valence compounds has thoroughly been investigated by e.g. temperature dependent ESR spectroscopy. However, almost nothing is known about the dynamics of optically induced electron transfer processes in such systems. Therefore, we investigated these processes in mixed valence compounds based on triphenylamine redox centres bridged by conjugated spacers by NIR transient absorption spectroscopy with fs-time resolution. These experiments revealed an internal conversion (IC) process to be on the order of 50–200 fs which is equivalent to the back electron transfer after optical excitation into the intervalence charge transfer band. This IC is followed by ultrafast cooling to the ground state within 1 ps. Thus, in the systems investigated optically induced electron transfer is about 3–4 orders of magnitude faster than thermally induced ET.

Graphical abstract: How fast is optically induced electron transfer in organic mixed valence systems?

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 May 2016, accepted on 16 Jun 2016 and first published on 22 Jun 2016


Article type: Paper
DOI: 10.1039/C6CP03053J
Phys. Chem. Chem. Phys., 2016,18, 19405-19411

  •   Request permissions

    How fast is optically induced electron transfer in organic mixed valence systems?

    C. Lambert, M. Moos, A. Schmiedel, M. Holzapfel, J. Schäfer, M. Kess and V. Engel, Phys. Chem. Chem. Phys., 2016, 18, 19405
    DOI: 10.1039/C6CP03053J

Search articles by author

Spotlight

Advertisements