Role of Arginine-82 in Fast Proton Release during the Bacteriorhodopsin Photocycle:  A Time-Resolved FT-IR Study of Purple Membranes Containing15N-Labeled Arginine†

Biochemistry ◽  
2004 ◽  
Vol 43 (40) ◽  
pp. 12809-12818 ◽  
Author(s):  
Yaowu Xiao ◽  
M. Shane Hutson ◽  
Marina Belenky ◽  
Judith Herzfeld ◽  
Mark S. Braiman
Keyword(s):  
Fast Proton ◽  
Proton Release ◽  
Time Resolved ◽  
Ft Ir ◽  
Ir Study ◽  
Bacteriorhodopsin Photocycle ◽  
Purple Membranes

Role of the Surface Lewis Acid and Base Sites in the Adsorption of CO2 on Titania Nanotubes and Platinized Titania Nanotubes: An in Situ FT-IR Study

2013 ◽  
Vol 117 (24) ◽  
pp. 12661-12678 ◽  
Author(s):  
Kaustava Bhattacharyya ◽  
Alon Danon ◽  
Baiju K.Vijayan ◽  
Kimberly A. Gray ◽  
Peter C. Stair ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Titania Nanotubes ◽  
Acid And Base ◽  
Ft Ir ◽  
Ir Study ◽  
Adsorption Of Co2 ◽  
Lewis Acid And Base

The role of platinum on the NOx storage and desorption behavior of ceria: An online FT-IR study combined with in situ Raman and UV-Vis spectroscopy

2020 ◽  
Author(s):  
Anastasia Filtschew ◽  
Pablo Beato ◽  
Søren Birk Rasmussen ◽  
Christian Hess
Keyword(s):  
Gas Phase ◽  
Phase Analysis ◽  
Room Temperature ◽  
Storage Mechanism ◽  
In Situ Raman ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Ir Study

The role of platinum on the room temperature NOx storage mechanism and the NOx desorption behavior of ceria was investigated by combining online FT-IR gas-phase analysis with in situ Raman...

scholarly journals Ultrafast time-resolved quantum cascade laser diagnostic for revealing the role of surface formate species in the photocatalytic oxidation of methanol

2020 ◽  
Vol 10 (16) ◽  
pp. 5618-5627 ◽  
Author(s):  
Josefine Schnee ◽  
Marco Daturi ◽  
Mohamad El-Roz
Keyword(s):  
Ir Spectroscopy ◽  
Photocatalytic Oxidation ◽  
Time Resolved ◽  
Quantum Cascade ◽  
Oxidation Of Methanol ◽  
Laser Diagnostic ◽  
Surface Formate ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

QCL-assisted operando FT-IR spectroscopy revealed the role of surface formate species in the photocatalytic oxidation of methanol over TiO2.

Time-Resolved FT-IR Study on Reorientation of Ferroelectric Liquid Crystal, (S)-4-Methylhexyl 4-[4-(Decyloxy) Phenylethynyl]-2-Fluorobenzate

1993 ◽  
Vol 47 (9) ◽  
pp. 1382-1385 ◽  
Author(s):  
M. A. Czarnecki ◽  
N. Katayama ◽  
Y. Ozaki ◽  
M. Satoh ◽  
K. Yoshio ◽  
...  
Keyword(s):  
Raman Spectrum ◽  
Electric Field ◽  
Ferroelectric Liquid Crystal ◽  
Rigid Core ◽  
Time Resolved ◽  
Time Period ◽  
Hydrocarbon Chains ◽  
Ft Ir ◽  
Ir Study ◽  
Ft Raman

The electric-field-induced reorientation of (S)-4-methylhexyl 4-[4-(decyloxy) phenylethynyl]-2-fluorobenzate in the Sc* phase was investigated by using an asynchronous time-resolved FT-IR technique. The band assignments were made on the basis of the polarized FT-IR spectra and FT-Raman spectrum. The time-resolved study indicates that the reorientation occurs immediately after the electric field is applied. The molecule reorients as a unit; however the rigid core of the molecule seems to be more mobile than the hydrocarbon chains and needs a shorter period of time for the reorientation. The change of orientation is not completely finished in a 500-μs time period. Of particular note is the behavior of the carbonyl band; this band, usually strong in infrared spectra, is very weak in the time-resolved spectra.

Time-Resolved Step-Scan FT-IR Investigations of the Transition from KL to L in the Bacteriorhodopsin Photocycle: Identification of Chromophore Twists by Assigning Hydrogen-Out-Of-Plane (HOOP) Bending Vibrations

1993 ◽  
Vol 47 (9) ◽  
pp. 1394-1400 ◽  
Author(s):  
Olaf Weidlich ◽  
Friedrich Siebert
Keyword(s):  
Single Bond ◽  
Difference Spectra ◽  
Bending Vibrations ◽  
Time Resolved ◽  
Molecular Events ◽  
Out Of Plane ◽  
Ft Ir ◽  
Bacteriorhodopsin Photocycle ◽  
Protein Part ◽  
Ft Ir Spectroscopy

Sub-microsecond time-resolved step-scan FT-IR spectroscopy is applied to the study of the molecular changes and their dynamics occurring during the KL-L transition of bacteriorhodopsin. The time-resolved difference spectra are compared to the static low-temperature BR → K and BR → L difference spectra. Our data show that the protein part in KL is similar to that in K. However, the chromophore is more relaxed and is differently twisted. A strong hydrogen-out-of-plane (HOOP) mode in KL is assigned to the 15-HOOP. As is the case for L, a strong deformation of the C14-C15 single bond is deduced for KL. Evidence of a KL → L equilibrium is presented. In N, a 15-HOOP mode similar to that in L is observed, indicating very similar twists of the C14-C15 single bond. This observation excludes major contributions of this deformation to the reduction of the pKa of the Schiff base in L. From the spectral changes, important molecular events are deduced that occur in the transitions to KL, L, and N.

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