Near-Infrared Reversible Photoswitching of an Isolated Azobenzene-Stilbene Dye

Carrascosa, Eduardo, Bull, James N., Buntine, Jack T., Da Silva, Gabriel, Santos, Paulo F. and Bieske, Evan J. (2020) Near-Infrared Reversible Photoswitching of an Isolated Azobenzene-Stilbene Dye. Chemical Physics Letters, 741. ISSN 0009-2614

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Photoswitching of a charged azobenzene-stilbene dye is investigated through laser excitation in a tandem ion mobility mass spectrometer. Action spectra associated with E→Z and Z→E photoisomerisation of the stilbene group exhibit bands at 685 and 440 nm, corresponding to S1←S0 and S3←S0 transitions, respectively. The data suggest that isomers possessing a Z configuration of the azobenzene unit rapidly convert to E isomers and are not discernible using ion mobility spectrometry, and that photoisomerisation occurs through excited state dynamics rather than statistical isomerisation on the ground state potential energy surface.

Item Type: Article
Uncontrolled Keywords: action spectroscopy,ion mobility,molecules,photoisomerisation,photoswitch,stilbene
Faculty \ School: Faculty of Science > School of Chemistry
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Depositing User: LivePure Connector
Date Deposited: 08 Jan 2020 04:22
Last Modified: 04 Apr 2021 01:56
DOI: 10.1016/j.cplett.2019.137065

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