TY - JOUR
T1 - Photoconversion of spiropyran to merocyanine in a monolayer observed using nanosecond pump-probe brewster angle reflectometry
AU - Siebenhofer, Bernhard
AU - Gorelik, Sergey
AU - Sadovoy, Anton V.
AU - Lear, Martin J.
AU - Song, Hong Yan
AU - Nowak, Christoph
AU - Hobley, Jonathan
N1 - Funding Information:
This work was funded by the International Graduate School Bio-Nano-Tech, a joint venture of University of Natural Resources and Life Sciences Vienna (BOKU), the Austrian Institute of Technology (AIT) and the Nanyang Technological University (NTU). Equipment and materials were supported by A-STAR JCO and A-STAR-JST funding.
PY - 2012
Y1 - 2012
N2 - A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. In order to achieve this, a cylindrical lens is placed in the probe beam path replacing the goniometer that is usually used for angular scanning in other systems. Using two synchronized nanosecond pulsed lasers in pump-probe configuration it is possible to measure the kinetics of photoinduced conformational changes by altering the delay between pump and probe pulses. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. The first stage occurred with a timescale close to the instrument time resolution (tens of nanoseconds) whereas the second stage occurred over a few hundred nanoseconds.
AB - A new apparatus for nanosecond-time-resolved Brewster angle reflectometry is described that can be used to measure transient angle-resolved reflectivity changes in thin films and monolayers in a single pulsed laser shot. In order to achieve this, a cylindrical lens is placed in the probe beam path replacing the goniometer that is usually used for angular scanning in other systems. Using two synchronized nanosecond pulsed lasers in pump-probe configuration it is possible to measure the kinetics of photoinduced conformational changes by altering the delay between pump and probe pulses. The system was used to observe nanosecond time-resolved photodynamics in a spiropyran monolayer at the air-water interface. After UV excitation the spiropyran converted to its merocyanine form in two stages. The first stage occurred with a timescale close to the instrument time resolution (tens of nanoseconds) whereas the second stage occurred over a few hundred nanoseconds.
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U2 - 10.1071/CH12093
DO - 10.1071/CH12093
M3 - Article
AN - SCOPUS:84858789554
VL - 65
SP - 283
EP - 289
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 3
ER -