Action spectroscopy of deprotomer-selected hydroxycinnamate anions

JN Bull; JT Buntine; E Carrascosa; MH Stockett; EJ Bieske

Journal article

Action spectroscopy of deprotomer-selected hydroxycinnamate anions

JN Bull, JT Buntine, E Carrascosa, MH Stockett, EJ Bieske

European Physical Journal D | SPRINGER | Published : 2021

DOI: 10.1140/epjd/s10053-021-00070-2

Abstract

Abstract: Tandem ion mobility mass spectrometry-coupled laser excitation is used to record photodetachment, photoisomerization and photodepletion action spectra for a series of deprotomer-selected hydroxycinnamate anions, including deprotonated caffeic, ferulic and sinapinic acids. This molecular series accounts for most hydroxycinnamic moieties found in nature. Phenoxide deprotomers for para and ortho structural isomers have similar photodetachment action spectra that span the 350 – 460 nm range with the maximum response occurring between 420 and 440 nm. None of the phenoxide deprotomers showed evidence for E→ Z photoisomerization. In contrast, photoexcitation of the carboxylate deprotomers..

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University of Melbourne Researchers

Evan Bieske Author

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Grants

Awarded by University of East Anglia

Funding Acknowledgements

This research was supported under the Australian Research Council's Discovery Project funding scheme (DP150101427 and DP160100474) and Swedish Foundation for International Cooperation in Research and Higher Education (STINT, Grant Number PT2017-7328). JTB acknowledges The University of Melbourne for a Melbourne Research Scholarship (MRS) and the Australian Government for an Australian Research Training Program Scholarship (RTP). EC acknowledges support by the Austrian Science Fund (FWF) through a Schrodinger Fellowship (Nr. J4013-N36). Electronic structure calculations were carried out on the High Performance Computing Cluster supported by the Research and Specialist Computing Support service at the University of East Anglia.