J.H. van der Maas

Correlation between CO frequency and Pt coordination number. A DRIFT study on supported Pt catalysts

AbstractThe infrared stretching frequencies of linear-bonded carbon monoxide on face, edge and corner atoms have been identified with four platinum catalysts. The metal particles were supported on different absorbentia and each having a different average particle size, ranging from about 10 to 200 Å. The

Dependence of Bandshape and Depolarization Ratio on Slitwidth

\tilde v_{CO}

Structure and vibrational dynamics of tetragonal NaBi(WO4)2 scheelite crystal

values of the various absorption bands correlate linearly with the number of nearest neighbours of the different surface sites (n in Cn). Effects of an interaction between Pt clusters and support on the linear-CO stretching frequency have not been observed. This empirical correlation between

STRUCTURE AND VIBRATIONAL PROPERTIES OF TETRAGONAL SCHEELITE NABI(MOO4)2

\tilde v_{CO}

Recognition of visual characteristics of infrared spectra by artificial neural networks and partial least squares regression

and Cn, and the advantages ofin situ Diffuse Reflectance Fourier transform Infrared Spectroscopy in combination with derivative spectrometry opens the possibility to monitor the dispersity of supported platinum in a simple and relatively quick way.

Hydrogen bonds in crystalline carbohydrates : a variable-temperature FT-IR study

Infrared data have been recorded of the hydroxyl stretching band for about 70 monohydric saturated alcohols in dilute carbon tetrachloride solution. The wavenumber maximum, the half-bandwidth and the band pattern could be related to the structure of the molecules. Not only primary, secondary and tertiary alcohols can be distinguished but also β-branched and cyclic ones. Four effects seem to be connected with the OH stretching band; viz. substitution and fixation both lowering the frequency, and rotation and shielding both enhancing it. For identification purposes a table correlating structure, wavenumber and half-bandwidth is presented.