Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Polish Journal of Chemistry

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Principal Components Analysis of Infrared Spectra of Liquid Acetylacetone

Czarnik-Matusewicz B., Matusiak-Kucharska M., Hawranek J. P.

Polish Journal of Chemistry

2009

Vol. 83, nr 5

999-1011

The spectrum of the absorption index in the Mid-Infrared (MIR) region was determined for intramolecularly hydrogen-bonded liquid acetylacetone from transmission studies. In the MIR region very thin layers with thick nesses of a few micrometers had to be used to obtain reliable data. The keto-enol tautomeric equilibrium in the pure liquid was studied by Principal Components Analysis (PCA) of a set of temperature dependent MIR spectra in the range from 25 to 75 graduate C. Identifications for numerous bands observed in the liquid phase were proposed basing on the results obtained by means of the separation obtained in the loadings plot.

Thin film transmission spectra and vibrational intensities of liquid pyridine

Wrzeszcz W., Czarnik-Matusewicz B., Hawranek J.P.

Polish Journal of Chemistry

1998

Vol. 72, nr 2

302-313

Thin film transmission spectra of liquid pyridine were measured in the 3300-500 cm(-) region, using cells of thicknesses ranging from 1,4 micro m to 522 micro m. The spectrum of the absorption index was determined from these data in the Mid-IR range. Vitrational intensities and other spectral parameters were calculated from the k(v) spectrum. The assignment of numerous bands was carried out. The data were compared with results of recent DFT calculations of the infrared spectrum of pyridine.