Volume 23, Issue 56 p. 14090-14095
Full Paper

Efficient Sensitized ZE Photoisomerization of an Iridium(III)-Azobenzene Complex over a Wide Concentration Range

Javier Moreno

Javier Moreno

Department of Chemistry & IRIS-Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany

Current address: Department of Chemical Biology I, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, im Forschungsverbund Berlin e.V. (FMP), Robert-Roessle-Str. 10, 13125 Berlin, Germany

Search for more papers by this author
Lutz Grubert

Lutz Grubert

Department of Chemistry & IRIS-Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany

Search for more papers by this author
Jutta Schwarz

Jutta Schwarz

Department of Chemistry & IRIS-Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany

Search for more papers by this author
David Bléger

David Bléger

Department of Chemistry & IRIS-Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany

Search for more papers by this author
Stefan Hecht

Corresponding Author

Stefan Hecht

Department of Chemistry & IRIS-Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany

Search for more papers by this author
First published: 07 September 2017
Citations: 9

Graphical Abstract

Beating diffusion by covalently linking a photosensitizing Ir complex to an azobenzene unit to achieve efficient indirect photoisomerization at low concentration.

Abstract

To improve the sensitized ZE photoisomerization of azobenzenes, and circumvent the threshold concentration necessary for the bimolecular photoinduced electron transfer reaction to generate the rapidly isomerizing Z-azobenzene radical anion, an IrIII complex with a covalently tethered azobenzene fragment was synthesized. Selective irradiation of the 1MLCT band of the IrIII complex induced an efficiently sensitized photoswitching of the dyad over a wide concentration range and even at high dilution.

Conflict of interest

The authors declare no conflict of interest.