FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Smolentsev, Grigory
   Guda, Alexander
   Zhang, Xiaoyi
   Haldrup, Kristoffer
   Andreiadis, Eugen S.
   Chayarot-Kerlidou, Murielle
   Canton, Sophie E.
   Nachtegaal, Maarten
   Artero, Vincent
   Sundstrom, Villy
TI Pump-Flow-Probe X-ray Absorption Spectroscopy as a Tool for Studying
   Intermediate States of Photocatalytic Systems
SO JOURNAL OF PHYSICAL CHEMISTRY C
VL 117
IS 34
BP 17367
EP 17375
DI 10.1021/jp4010554
PD AUG 29 2013
PY 2013
AB A new setup for pump-flow-probe X-ray absorption spectroscopy has been
   implemented at the SuperXAS beamline of the Swiss Light Source. It
   allows recording X-ray absorption spectra with a time resolution of tens
   of microseconds and high detection efficiency for samples with
   sub-millimolar concentrations. A continuous wave laser is used for the
   photoexcitation, with the distance between laser and X-ray beams and
   velocity of liquid flow determining the time delay, while the focusing
   of both beams and the flow speed profile define the time resolution.
   This method is compared with the alternative measurement technique that
   utilizes a 1 kHz repetition rate laser and multiple X-ray probe pulses.
   Such an experiment was performed at beamline 11ID-D of the Advanced
   Photon Source. Advantages, limitations, and potential for improvement of
   the pump-flow-probe setup are discussed by analyzing the photon
   statistics. Both methods with Co K-edge probing were applied to the
   investigation of a cobaloxime-based photocatalytic reaction. The
   interplay between optimizing for efficient photoexcitation and time
   resolution as well and the effect of sample degradation for these two
   setups are discussed.
RI Artero, Vincent/C-6853-2008; Andreiadis, Eugen/D-2932-2009; Guda, Alexander/A-3671-2015; Haldrup, Kristoffer/J-6875-2013
OI Artero, Vincent/0000-0002-6148-8471; Andreiadis,
   Eugen/0000-0002-0617-5616; Guda, Alexander/0000-0002-6941-4987; Haldrup,
   Kristoffer/0000-0002-0565-6397
ZB 0
Z8 0
ZS 0
ZR 1
TC 6
Z9 7
SN 1932-7447
UT WOS:000323917300001
ER

EF