Journal article

Linkage Photoisomerization of an Isolated Ruthenium Sulfoxide Complex: Sequential versus Concerted Rearrangement

Michael S Scholz, James N Bull, Eduardo Carrascosa, Brian D Adamson, Gilbert K Kosgei, Jeffrey J Rack, Evan J Bieske



Ruthenium sulfoxide complexes undergo thermally reversible linkage isomerization of sulfoxide ligands from S- to O-bound in response to light. Here, we report photoisomerization action spectra for a ruthenium bis-sulfoxide molecular photoswitch, [Ru(bpy)2(bpSO)]2+, providing the first direct evidence for photoisomerization of a transition metal complex in the gas phase. The linkage isomers are separated and isolated in a tandem drift tube ion mobility spectrometer and exposed to tunable laser radiation provoking photoisomerization. Direct switching of the S,S-isomer to the O,O-isomer following absorption of a single photon is the predominant isomerization pathway in the gas phase, unlike in ..

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University of Melbourne Researchers


Awarded by Australian Research Council's Discovery Project

Awarded by National Science Foundation

Awarded by Austrian Science Fund (FWF)

Funding Acknowledgements

This research was funded under the Australian Research Council's Discovery Project funding scheme (project numbers DP150101427 and DP160100474) and the National Science Foundation under grants CHE 0809699, 0947031, and 1112250. M.S.S. thanks the Australian government for an Australian Postgraduate Award scholarship. E.C. acknowledges support from the Austrian Science Fund (FWF) through a Schrodinger Fellowship (Nr. J4013-N36).