IR spectroscopic characterisation of hydrous species in minerals

2015 ◽  
pp. 227-279 ◽  
Author(s):  
Eugen Libowitzky ◽  
Anton Beran
Keyword(s):  
Ir Spectroscopic ◽  
Spectroscopic Characterisation

Ketenes from N-(2-Pyridyl)amides

2015 ◽  
Vol 68 (4) ◽  
pp. 687 ◽  
Author(s):  
Carsten Plüg ◽  
Hussein Kanaani ◽  
Curt Wentrup
Keyword(s):  
Ft Ir ◽  
Ir Spectroscopic ◽  
Spectroscopic Characterisation

Methoxycarbonylketene 4a, methoxycarbonyl(methyl)ketene 4b, chloroketene 4c, cyanoketene 4d, diphenylketene 4e, and 2-pyridylketene 4f have been generated by flash vacuum thermolysis of the corresponding 2-pyridylacetamide derivatives 3a–f and isolated in Ar matrices for FT-IR spectroscopic characterisation. The N-(2-pyridyl)-2-pyridylacetamide 3f yielded 2-pyridyl isocyanate in addition to 2-pyridylketene.

Synthesis and IR spectroscopic characterisation of immobilised superoxide dismutase (SOD) mimicking complexes

2005 ◽  
Vol 744-747 ◽  
pp. 495-500 ◽  
Author(s):  
I. Szilágyi ◽  
I. Labádi ◽  
K. Hernadi ◽  
I. Pálinkó ◽  
T. Kiss
Keyword(s):  
Superoxide Dismutase ◽  
Ir Spectroscopic ◽  
Spectroscopic Characterisation

Mass spectrometric and IR spectroscopic characterisation of monomeric molecular ruthenium oxide tetrafluoride

1993 ◽  
Vol 64 (1-2) ◽  
pp. 117-123 ◽  
Author(s):  
Alan K. Brisdon ◽  
Eric G. Hope ◽  
John H. Holloway ◽  
William Levason ◽  
J.Steven Ogden
Keyword(s):  
Ruthenium Oxide ◽  
Mass Spectrometric ◽  
Ir Spectroscopic ◽  
Spectroscopic Characterisation

Raman and FT-IR spectroscopic characterisation of flux grown KTiOPO4 and KRbTiOPO4 non-linear optical crystals

1997 ◽  
Vol 49 (3) ◽  
pp. 204-210 ◽  
Author(s):  
K. Vivekanandan ◽  
S. Selvasekarapandian ◽  
P. Kolandaivel ◽  
M.T. Sebastian ◽  
S. Suma
Keyword(s):  
Optical Crystals ◽  
Non Linear ◽  
Ft Ir ◽  
Linear Optical ◽  
Ir Spectroscopic ◽  
Spectroscopic Characterisation

Spectral Investigation on the Growth and Characterization of NLO Crystals of Thiourea Succinic Acid Single Crystal.

2015 ◽  
Vol 2 (2) ◽  
pp. 70-73
Author(s):  
Kannan.P ◽  
Thambidurai.S ◽  
Suresh.N
Keyword(s):  
Single Crystal ◽  
Succinic Acid ◽  
Slow Evaporation Technique ◽  
Absorption Studies ◽  
Dta Analysis ◽  
Evaporation Technique ◽  
Ft Ir ◽  
Ir Spectroscopic ◽  
Thermal Stability Of

Growth of optically transparent single crystals of thiourea succinic acid (TUSA) was grown successfully from aqueous solution by slow evaporation technique. The crystal structure was elucidated using the single crystal XRD. The various functional groups and the modes of vibrations were identified by FT-IR spectroscopic analysis. The optical absorption studies indicate that the optical transparency window is quite wide making its suitable for NLO applications. Thermal stability of the crown crystal carried out by TGA-DTA analysis.

Kinetics of catalytic reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst

1983 ◽  
Vol 48 (11) ◽  
pp. 3202-3208 ◽  
Author(s):  
Zdeněk Musil ◽  
Vladimír Pour
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxide ◽  
Rate Equation ◽  
Catalytic Reduction ◽  
Zero Order ◽  
Spectroscopic Measurements ◽  
First Order ◽  
Ir Spectroscopic ◽  
Kinetics Of ◽  
Al2o3 Catalyst

The kinetics of the reduction of nitrogen oxide by carbon monoxide on CuO/Al2O3 catalyst (8.36 mass % CuO) were determined at temperatures between 413 and 473 K. The reaction was found to be first order in NO and zero order in CO. The observed kinetics are consistent with a rate equation derived from a mechanism proposed on the basis of IR spectroscopic measurements.

Gas Cell Infrared and Attenuated Total Reflection Infrared Spectroscopic Studies for Organic–Inorganic Interactions in Adsorption of Fulvic Acid on the Goethite Surface Generating Carbon Dioxide

2021 ◽  
pp. 000370282199121
Author(s):  
Yuki Nakaya ◽  
Satoru Nakashima ◽  
Takahiro Otsuka
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Fulvic Acid ◽  
Spectroscopic Studies ◽  
Reaction Model ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Gas Cell ◽  
Rate Determining Step ◽  
Ir Spectroscopic

The generation of carbon dioxide (CO2) from Nordic fulvic acid (FA) solution in the presence of goethite (α-FeOOH) was observed in FA–goethite interaction experiments at 25–80 ℃. CO2 generation processes observed by gas cell infrared (IR) spectroscopy indicated two steps: the zeroth order slower CO2 generation from FA solution commonly occurring in the heating experiments of the FA in the presence and absence of goethite (activation energy: 16–19 kJ mol–1), and the first order faster CO2 generation from FA solution with goethite (activation energy: 14 kJ mol–1). This CO2 generation from FA is possibly related to redox reactions between FA and goethite. In situ attenuated total reflection infrared (ATR-IR) spectroscopic measurements indicated rapid increases with time in IR bands due to COOH and COO– of FA on the goethite surface. These are considered to be due to adsorption of FA on the goethite surface possibly driven by electrostatic attraction between the positively charged goethite surface and negatively charged deprotonated carboxylates (COO–) in FA. Changes in concentration of the FA adsorbed on the goethite surface were well reproduced by the second order reaction model giving an activation energy around 13 kJ mol–1. This process was faster than the CO2 generation and was not its rate-determining step. The CO2 generation from FA solution with goethite is faster than the experimental thermal decoloration of stable structures of Nordic FA in our previous report possibly due to partial degradations of redox-sensitive labile structures in FA.

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