Photoswitching an Isolated Donor-Acceptor Stenhouse Adduct

JN Bull; E Carrascosa; N Mallo; MS Scholz; G Da Silva; JE Beves; EJ Bieske

Journal article

Photoswitching an Isolated Donor-Acceptor Stenhouse Adduct

JN Bull, E Carrascosa, N Mallo, MS Scholz, G Da Silva, JE Beves, EJ Bieske

Journal of Physical Chemistry Letters | AMER CHEMICAL SOC | Published : 2018

DOI: 10.1021/acs.jpclett.7b03402

Abstract

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 dri..

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University of Melbourne Researchers

Gabriel da Silva Author

Evan Bieske Author

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Grants

Awarded by Microsoft

Funding Acknowledgements

This research was supported under the Australian Research Council's Discovery Project funding scheme (DP150101427 and DP160100474 to E.J.B. and DP160100870 to J.E.B.) and Future Fellowship (FT170100094 to J.E.B. and FT130101304 to G.d.S.). Computational resources were provided by the Australian National Computational Infrastructure through award of Early Career Allocation yal and a Microsoft Azure Research Award to J.N.B. E.C. acknowledges support by the Austrian Science Fund (FWF) through a Schrodinger Fellowship (Nr. J4013-N36). M.S.S. thanks the Australian government for an Australian Postgraduate Award scholarship. Prof. Javier Read da Alaniz, University of California Santa Barbara, is thanked for providing preliminary samples from the study reported in ref 1.