Infrared spectra of bicarbonate ions formed in solid alkali halides by oxyanion oxidation

1969 ◽  
Vol 8 (2) ◽  
pp. 246-251 ◽  
Author(s):  
P. M. Maguire ◽  
Hector E. Rubalcava
Keyword(s):  
Infrared Spectra ◽  
Alkali Halides ◽  
Bicarbonate Ions ◽  
Solid Alkali Halides

Catalysis of the slow combustion of acetaldehyde by alkali halides

1966 ◽  
Vol 19 (1) ◽  
pp. 65 ◽  
Author(s):  
BJ Poppleton ◽  
MFR Mulcahy
Keyword(s):  
Alkali Halides ◽  
Inhibitory Effect ◽  
Slow Combustion ◽  
Solid Alkali Halides ◽  
Catalytic Effects

Solid alkali halides catalyse the slow combustion of acetaldehyde vapour at 100-125�. The catalysis (by chlorides) is not sensitive to the nature of the cation (Li+, K+, Cs+, Ca2+, Ba2+) but changes drastically with a change in anion, the relative catalytic effects being in the order Br-�Cl- > F-. I- probably exerts an inhibitory effect. The catalysis is attributed tentatively to the sensitizing action of free halogen produced by reaction of acetyl hydroperoxide with the halide. There is a general kinetic similarity with the much weaker catalysis by glass observed by previous workers.

Diffuse reflectance infrared spectra of kaolinite and kaolinite/alkali halide mixtures. Curve-fitting of the OH stretching region

1991 ◽  
Vol 69 (11) ◽  
pp. 1786-1790 ◽  
Author(s):  
K. H. Michaelian ◽  
W. I. Friesen ◽  
S. Yariv ◽  
A. Nasser
Keyword(s):  
Infrared Spectra ◽  
Curve Fitting ◽  
Alkali Halide ◽  
Diffuse Reflectance ◽  
Alkali Halides ◽  
Hydroxyl Groups ◽  
Caesium Chloride ◽  
Inner Surface ◽  
Structural Hydroxyl ◽  
Diffuse Reflectance Infrared

Diffuse reflectance infrared spectra of kaolinite and binary mixtures of this clay with alkali halides have been analysed using curve-fitting and deconvolution. For caesium chloride and caesium bromide, decomposition of the hydroxyl stretching region has made it possible to correlate the positions and intensities of bands due to structural hydroxyl groups of kaolinite, or to intercalated water, with the degree of intercalation. One of these bands, arising from uncoupled inner surface OH stretching in kaolinite, is not identifiable in spectra of the uncomplexed clay or mixtures where intercalation did not occur. A new band revealed by curve-fitting spectra of intercalated samples is attributed either to water at the interface between the clay and the alkali halide, or to an FeO—H impurity in the kaolinite. Key words: kaolinite, infrared, curve-fitting.

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