Room temperature spectroscopic investigations of K14NO3 , K15NO3 , K14N16O3−x18Ox and a 1:1 mixture of K14NO3 and K15NO3: intermolecular coupling revealed in the vibrational spectra
✍ Scribed by Taposh Chakraborty; P. K. Bajpai; A. L. Verma
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 177 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0377-0486
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✦ Synopsis
The di †use reÑectance Fourier transform IR (DRIFT) and Raman spectra for microcrystalline K14NO 3 , and a 1 : 1 mixture of and were measured at room temperature.
K15NO 3 new assignment for the observed factor group split components of the asymmetric N-O stretching mode and infrared evidence for the existence of dynamically disordered ions is proposed. Attractive intermolecular NO 3 dipolar interaction among the ions along the chain is invoked to explain the spectral features around the NO 3 asymmetric stretching mode region in the Raman spectrum of the 1 : 1 mixed salt of and K14NO 3 K15NO 3 . Analysis of the experimental data for the oxygen-enriched salt also demonstrates the existence of intermolecular coupling in the asymmetric stretching mode region. The intensities of the Raman components of the totally symmetric N-O stretching and in-plane bending mode regions correlate almost quantitatively with the calculated distribution of the various isotopes of ions in 18O-enriched The IR intensity of the corresponding NO 3 -KNO 3 . bands, on the other hand, is dependent on the symmetry of the respective isotopic species. Copyright John ( 1999 Wiley & Sons, Ltd.