Photoisomerization of protonated azobenzenes in the gas phase

Scholz, Michael S., Bull, James N. ORCID:, Coughlan, Neville J.A., Carrascosa, Eduardo, Adamson, Brian D. and Bieske, Evan J. (2017) Photoisomerization of protonated azobenzenes in the gas phase. Journal of Physical Chemistry A, 121 (34). pp. 6413-6419. ISSN 1089-5639

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Because of their high photoisomerization efficiencies, azobenzenes and their functionalized derivatives are used in a broad range of molecular photoswitches. Here, the photochemical properties of the trans isomers of protonated azobenzene (ABH+) and protonated 4-aminoazobenzene (NH2ABH+) cations are investigated in the gas phase using a tandem ion mobility spectrometer. Both cations display a strong photoisomerization response across their S1 ↔ S0 bands, with peaks in their photoisomerization yields at 435 and 525 nm, respectively, red-shifted with respect to the electronic absorption bands of the unprotonated AB and NH2AB molecules. The experimental results are interpreted with the aid of supporting electronic structure calculations considering the relative stabilities and geometries of the possible isomers and protomers and vertical electronic excitation energies.

Item Type: Article
Uncontrolled Keywords: physical and theoretical chemistry ,/dk/atira/pure/subjectarea/asjc/1600/1606
Faculty \ School: Faculty of Science > School of Chemistry
UEA Research Groups: Faculty of Science > Research Groups > Chemistry of Light and Energy
Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
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Depositing User: LivePure Connector
Date Deposited: 28 Feb 2019 16:30
Last Modified: 04 Mar 2024 17:46
DOI: 10.1021/acs.jpca.7b05902

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