Photoswitching an isolated donor-acceptor Stenhouse adduct

Bull, James N. ORCID:, Carrascosa, Eduardo, Mallo, Neil, Scholz, Michael S., Da Silva, Gabriel, Beves, Jonathon E. and Bieske, Evan J. (2018) Photoswitching an isolated donor-acceptor Stenhouse adduct. Journal of Physical Chemistry Letters, 9 (3). pp. 665-671. ISSN 1948-7185

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Donor-acceptor Stenhouse adducts (DASAs) are a new class of photoswitching molecules with excellent fatigue resistance and synthetic tunability. Here, tandem ion mobility mass spectrometry coupled with laser excitation is used to characterize the photocyclization reaction of isolated, charge-tagged DASA molecules over the 450-580 nm range. The experimental maximum response at 530 nm agrees with multireference perturbation theory calculations for the S1 ← S0 transition maximum at 533 nm. Photocyclization in the gas phase involves absorption of at least two photons; the first photon induces Z-E isomerization from the linear isomer to metastable intermediate isomers, while the second photon drives another E-Z isomerization and 4-electrocyclization reaction. Cyclization is thermally reversible in the gas phase with collisional excitation.

Item Type: Article
Uncontrolled Keywords: materials science(all) ,/dk/atira/pure/subjectarea/asjc/2500
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: 09 Feb 2023 13:46
DOI: 10.1021/acs.jpclett.7b03402

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