Journal article

Online measurement of photoisomerisation efficiency in solution using ion mobility mass spectrometry

James N Bull, Eduardo Carrascosa, Michael S Scholz, Neville JA Coughlan, Evan J Bieske

Analyst | Royal Society of Chemistry | Published : 2017


The photoisomerisation of charged molecules in solution is probed directly using ion mobility mass spectrometry with electrospray ionisation. The technique is demonstrated using a prototype azoheteroarene cation in methanol. By scanning the wavelength of the excitation light while monitoring the photoisomer intensity a photoisomerisation action spectrum is generated, which, when compared with a conventional absorption spectrum, allows the relative photoisomerisation quantum yield to be determined across a range of wavelengths.

University of Melbourne Researchers


Awarded by Australian Research Council

Awarded by Austrian Science Fund (FWF) through a Schrodinger Fellowship

Funding Acknowledgements

This research was funded through the Australian Research Council Discovery Project scheme (DP150101427 and DP160100474). E.C. acknowledges support by the Austrian Science Fund (FWF) through a Schrodinger Fellowship (No. J4013N36). M.S.S. thanks the Australian government for an Australian Postgraduate Award scholarship. Prof. Akio Kawai, Tokyo Institute of Technology, is thanked for providing the [2PA-MOEmim]<SUP>+</SUP> sample.