scholarly journals Effect of Dehydrated Trehalose Matrix on the Kinetics of Forward Electron Transfer Reactions in Photosystem I

2017 ◽  
Vol 231 (2) ◽  
Author(s):  
Ivan Shelaev ◽  
Michael Gorka ◽  
Anton Savitsky ◽  
Vasily Kurashov ◽  
Mahir Mamedov ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photosystem I ◽  
Time Domain ◽  
Probe Laser ◽  
Glassy Matrix ◽  
Back Reaction ◽  
Time Resolved ◽  
Pump Probe ◽  
Kinetics Of ◽  
Subnanosecond Time

AbstractThe effect of dehydration on the kinetics of forward electron transfer (ET) has been studied in cyanobacterial photosystem I (PS I) complexes in a trehalose glassy matrix by time-resolved optical and EPR spectroscopies in the 100 fs to 1 ms time domain. The kinetics of the flash-induced absorption changes in the subnanosecond time domain due to primary and secondary charge separation steps were monitored by pump–probe laser spectroscopy with 20-fs low-energy pump pulses centered at 720 nm. The back-reaction kinetics of P

Electron Transfer Kinetics of Cytochrome c Probed by Time-Resolved Surface-Enhanced Resonance Raman Spectroscopy

2009 ◽  
Vol 113 (8) ◽  
pp. 2492-2497 ◽  
Author(s):  
Marc Grosserueschkamp ◽  
Marcel G. Friedrich ◽  
Markus Plum ◽  
Wolfgang Knoll ◽  
Renate L. C. Naumann
Keyword(s):  
Raman Spectroscopy ◽  
Electron Transfer ◽  
Cytochrome C ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Electron Transfer Kinetics ◽  
Time Resolved ◽  
Surface Enhanced ◽  
Kinetics Of

scholarly journals Picosecond Raman Investigation of the Structure and Reactivity of 4,4′-Bipyridine in the S1 State

1999 ◽  
Vol 19 (1-4) ◽  
pp. 353-356
Author(s):  
G. Buntinx ◽  
L. Bussotti ◽  
V. De Waele ◽  
C. Didierjean ◽  
O. Poizat
Keyword(s):  
Raman Spectroscopy ◽  
Time Domain ◽  
Electronic Excitation ◽  
Singlet State ◽  
Resonance Raman Spectroscopy ◽  
Excited Singlet State ◽  
Excited Singlet ◽  
Time Resolved ◽  
Pump Probe ◽  
Spectroscopic Evidence

The lowest excited singlet state (S1) of 4,4′-bipyridine (44BPY) has been studied in water and methanol by using pump-probe time-resolved resonance Raman spectroscopy in the picosecond time domain. Spectroscopic evidence for a disymmetric S1 structure with localization of the electronic excitation in one of the two pyridyl rings is given. The fast formation of the N-hydro radical 44BPYH• from the S1 state is clearly observed in methanol.

Kinetic Evidence for Transiently Shifted Acidity Constant of Histidine Linked to Paramagnetic Tyrosine Probed by Intramolecular Electron Transfer in Oxidized Peptides

2021 ◽  
Author(s):  
Olga B. Morozova ◽  
Dmitri Stass ◽  
Alexandra V. Yurkovskaya
Keyword(s):  
Electron Transfer ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Intramolecular Electron Transfer ◽  
Acidity Constant ◽  
Time Resolved ◽  
Chemically Induced ◽  
Kinetics Of

Kinetics of electron transfer (ET) from tyrosine (Tyr) to short-lived histidine (His) radicals in peptides of different structures was monitored using time-resolved chemically induced dynamic nuclear polarization (CIDNP) to follow...

Two-color pump-probe laser spectroscopy instrument with picosecond time-resolved electronic delay and extended scan range

2005 ◽  
Vol 76 (11) ◽  
pp. 114301 ◽  
Author(s):  
Anchi Yu ◽  
Xiong Ye ◽  
Dan Ionascu ◽  
Wenxiang Cao ◽  
Paul M. Champion
Keyword(s):  
Laser Spectroscopy ◽  
Probe Laser ◽  
Time Resolved ◽  
Pump Probe

scholarly journals Picosecond Acoustics Technique to Measure the Sound Velocities of Fe-Si Alloys and Si Single-Crystals at High Pressure

Minerals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 214 ◽  
Author(s):  
Eric Edmund ◽  
Michel Gauthier ◽  
Daniele Antonangeli ◽  
Simon Ayrinhac ◽  
Silvia Boccato ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystals ◽  
Acoustic Properties ◽  
Probe Laser ◽  
Laser Technique ◽  
Time Resolved ◽  
Pump Probe ◽  
Longitudinal Sound Velocity ◽  
Diamond Anvil ◽  
Complete Set

We describe here a time resolved pump-probe laser technique—picosecond interferometry—which has been combined with diamond anvil cells (DAC). This method enables the measurement of the longitudinal sound velocity up to Mbar pressure for any kind of material (solids, liquids, metals, insulators). We also provide a description of picosecond acoustics data analysis in order to determine the complete set of elastic constants for single crystals. To illustrate such capabilities, results are given on the pressure dependence of the acoustic properties for prototypical cases: polycrystal (hcp-Fe-5 wt% Si up to 115 GPa) and single-crystal (Si up to 10 GPa).

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