Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Distortions in IR Spectra Related to Registration Conditions : II. The Influence of Scattering. / Novikov, R. G.; Konopnitskii, R.; Tsyganenko, A. A.
в: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Том 124, № 5, 01.05.2018, стр. 655-659.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Distortions in IR Spectra Related to Registration Conditions
T2 - II. The Influence of Scattering
AU - Novikov, R. G.
AU - Konopnitskii, R.
AU - Tsyganenko, A. A.
PY - 2018/5/1
Y1 - 2018/5/1
N2 - We consider distortions of the shapes of absorption bands of strongly scattering samples in the spectra of molecules adsorbed on the surface of dispersed solids. We show that the influence of the scattering on IR spectra of dispersed samples is not reduced merely to a weakening of the intensity of the transmitted light, but, rather, the scattering affects the contour of a spectral band due to changes in the refractive index of the substance in the range of the absorption band. Using carbon dioxide adsorbed on a NaX zeolite as an example, we demonstrate two methods for taking into account the contribution of the scattering to the spectra of surface compounds: the registration of the “diffuse-transmission” spectrum and placing a sample into an immersion liquid, for which liquid oxygen is used. The obtained spectra indicate that, if the zeolite is saturated with the adsorbate, the band of the antisymmetric stretching vibration of CO2 molecules broadens and reveals a complex structure as a result of the resonant dipole–dipole interaction between adsorbed molecules.
AB - We consider distortions of the shapes of absorption bands of strongly scattering samples in the spectra of molecules adsorbed on the surface of dispersed solids. We show that the influence of the scattering on IR spectra of dispersed samples is not reduced merely to a weakening of the intensity of the transmitted light, but, rather, the scattering affects the contour of a spectral band due to changes in the refractive index of the substance in the range of the absorption band. Using carbon dioxide adsorbed on a NaX zeolite as an example, we demonstrate two methods for taking into account the contribution of the scattering to the spectra of surface compounds: the registration of the “diffuse-transmission” spectrum and placing a sample into an immersion liquid, for which liquid oxygen is used. The obtained spectra indicate that, if the zeolite is saturated with the adsorbate, the band of the antisymmetric stretching vibration of CO2 molecules broadens and reveals a complex structure as a result of the resonant dipole–dipole interaction between adsorbed molecules.
UR - http://www.scopus.com/inward/record.url?scp=85049174073&partnerID=8YFLogxK
U2 - 10.1134/S0030400X18050156
DO - 10.1134/S0030400X18050156
M3 - Article
AN - SCOPUS:85049174073
VL - 124
SP - 655
EP - 659
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
IS - 5
ER -
ID: 41679907