Abstract
Ethane adsorption on the hydrogen, sodium, and zinc forms of faujasite brings about polarization anisotropy of the C-H stretching vibrations. This anisotropy shows itself most clearly as perturbation of the vibrational mode analogous to the breathing C-H mode ν1 of free ethane. The relative intensity and the low-frequency shift of the absorption band due to the distorted ν1 mode increase with increasing perturbation caused by the C2H6-adsorption site interaction. The polarizing power of adsorption sites increases in the order H+ < Na+ < Zn2+. The C-H stretching vibrations in ethane adsorbed on the cationic forms of the Y zeolite are not symmetry-forbidden; accordingly, adsorbed ethane gives more absorption bands than gaseous ethane. The interaction between ethane and zinc cations in the Y zeolite structure eliminates not only the symmetry forbiddenness but also the twofold degeneracy of the C-H stretches.
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Translated from Kinetika i Kataliz, Vol. 46, No. 3, 2005, pp. 434–440.
Original Russian Text Copyright © 2005 by Pidko, Kazanskii.
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Pidko, E.A., Kazanskii, V.B. IR Spectra of Ethane Adsorbed on the Hydrogen, Sodium, and Zinc Forms of a Y-Type Zeolite: Interpretation Using ab initio Quantum Chemical Calculations. Kinet Catal 46, 407–413 (2005). https://doi.org/10.1007/s10975-005-0093-9
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DOI: https://doi.org/10.1007/s10975-005-0093-9