Efficient Sensitized Z→E Photoisomerization of an Iridium(III)‐Azobenzene Complex over a Wide Concentration Range. Issue 56 (7th September 2017)

• Record Type: Journal Article
• Authors: Moreno, Javier; Grubert, Lutz; Schwarz, Jutta; Bléger, David; Hecht, Stefan
• Is Part Of: Chemistry. Volume 23:Issue 56(2017)
• Page Start: 14090
• Page End: 14095
• Publication Date: 2017-09-07
• Subjects: azobenzene -- iridium complexes -- photochromism -- photoinduced electron transfer -- spectroelectrochemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201703376
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: To improve the sensitized Z → E 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 Ir III complex with a covalently tethered azobenzene fragment was synthesized. Selective irradiation of the 1 MLCT band of the Ir III complex induced an efficiently sensitized photoswitching of the dyad over a wide concentration range and even at high dilution. Abstract : Beating diffusion by covalently linking a photosensitizing Ir complex to an azobenzene unit to achieve efficient indirect photoisomerization at low concentration.