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Pump‐Probe Fragmentation Action Spectroscopy: A Powerful Tool to Unravel Light‐Induced Processes in Molecular Photocatalysts
Author(s) -
Imanbaew Dimitri,
Lang Johannes,
Gelin Maxim F.,
Kaufhold Simon,
Pfeffer Michael G.,
Rau Sven,
Riehn Christoph
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201612302
Subject(s) - spectroscopy , fragmentation (computing) , femtosecond , mass spectrometry , supramolecular chemistry , photochemistry , chemical physics , chemistry , ion , materials science , nanotechnology , laser , molecule , optics , physics , computer science , organic chemistry , chromatography , quantum mechanics , operating system
We present a proof of concept that ultrafast dynamics combined with photochemical stability information of molecular photocatalysts can be acquired by electrospray ionization mass spectrometry combined with time‐resolved femtosecond laser spectroscopy in an ion trap. This pump‐probe “fragmentation action spectroscopy” gives straightforward access to information that usually requires high purity compounds and great experimental efforts. Results of gas‐phase studies on the electronic dynamics of two supramolecular photocatalysts compare well to previous findings in solution and give further evidence for a directed electron transfer, a key process for photocatalytic hydrogen generation.