Direct Observation of a Hydroperoxide Surface Intermediate upon Visible Light-Driven Water Oxidation at an Ir Oxide Nanocluster Catalyst by Rapid-Scan FT-IR Spectroscopy

2011 ◽  
Vol 133 (33) ◽  
pp. 12976-12979 ◽  
Author(s):  
Narayanappa Sivasankar ◽  
Walter W. Weare ◽  
Heinz Frei
Keyword(s):  
Ir Spectroscopy ◽  
Visible Light ◽  
Direct Observation ◽  
Water Oxidation ◽  
Rapid Scan ◽  
Surface Intermediate ◽  
Visible Light Driven ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

T-Jump/FT-IR Spectroscopy: A New Entry into the Rapid, Isothermal Pyrolysis Chemistry of Solids and Liquids

1992 ◽  
Vol 46 (6) ◽  
pp. 900-911 ◽  
Author(s):  
T. B. Brill ◽  
P. J. Brush ◽  
K. J. James ◽  
J. E. Shepherd ◽  
K. J. Pfeiffer
Keyword(s):  
Thin Film ◽  
Ir Spectroscopy ◽  
Bulk Material ◽  
Control Unit ◽  
Control Voltage ◽  
Near Surface ◽  
Rapid Scan ◽  
Gas Products ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The interface of a Pt filament pyrolysis control unit and a rapid-scan FT-IR spectrometer is described that enables the thermal decomposition of a thin film of material to be studied isothermally after heating at 2000°C/s. A model of the heat transfer of the Pt filament as a function of gas atmosphere and pressure is developed to help understand the instrument response. The control voltage of the Pt filament is highly sensitive to the thermochemistry of the thin film of sample. By simultaneously recording the control voltage and the rapid-scan IR spectra of the near-surface gas products, one learns considerable detail about chemical mechanisms relevant to combustion of a bulk material. The application of T-jump/FT-IR spectroscopy is illustrated with rapid thermolysis data for the energetic organoazide polymers azidomethyl-methyloxetane (AMMO), bis(azidomethyl)oxetane (BAMO), and glycidylazide polymer (GAP); the cyclic nitramine, octahydro-1,3,5,7-tetranitro-1,3,5,7-tetraazacine (HMX); and the nitroaromatic 1,3,5-triamino-2,4,6-trinitrobenzene (TATB).

Applications of Time-Resolved Step-Scan and Rapid-Scan FT-IR Spectroscopy: Dynamics from Ten Seconds to Ten Nanoseconds

1993 ◽  
Vol 47 (9) ◽  
pp. 1376-1381 ◽  
Author(s):  
T. J. Johnson ◽  
A. Simon ◽  
J. M. Weil ◽  
G. W. Harris
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Rapid Scan ◽  
Scan Time ◽  
Ft Ir ◽  
Complementary Nature ◽  
New Applications ◽  
Ft Ir Spectroscopy

The step-scan technique in Fourier transform infrared (FT-IR) spectroscopy is employed in new applications of time resolved spectroscopy (TRS). Results are demonstrated on time-resolved laser emissions and photolytically generated chemical reactions using both emission and absorption modes. New achievements in FT-IR temporal resolution are demonstrated, as well as the complementary nature of step-scan and rapid-scan time-resolved spectroscopy.

scholarly journals Visible Light Sensitized CO2 Activation by the Tetraaza [CoIIN4H(MeCN)]2+ Complex Investigated by FT-IR Spectroscopy and DFT Calculations

2015 ◽  
Vol 119 (9) ◽  
pp. 4645-4654 ◽  
Author(s):  
M. Zhang ◽  
M. El-Roz ◽  
H. Frei ◽  
J. L. Mendoza-Cortes ◽  
M. Head-Gordon ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Dft Calculations ◽  
Visible Light ◽  
Co2 Activation ◽  
Ft Ir ◽  
Ft Ir Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document