Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Band profile of hydroxyl groups in the infrared spectrum of hydrogen-bonded surface complexes : ammonia on silicon dioxide. / Pavlov, A. Yu; Tsyganenko, A. A.
в: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Том 77, № 1, 01.07.1994, стр. 21-27.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Band profile of hydroxyl groups in the infrared spectrum of hydrogen-bonded surface complexes
T2 - ammonia on silicon dioxide
AU - Pavlov, A. Yu
AU - Tsyganenko, A. A.
PY - 1994/7/1
Y1 - 1994/7/1
N2 - Dependences of the band maximum and band half-width of the stretching modes of surface OH and OD groups perturbed by ammonia adsorption on Aerosil were studied as functions of sample temperature, amount of adsorbed ammonia, and thermal treatment in vacuum. The appearance of a low-frequency wing was explained by the formation of polymer chains of OH groups coupled via adsorbed molecules. The latter tend to form a second bond with an oxygen atom of the neighboring OH group in addition to a hydrogen bond with a hydroxyl proton via nitrogen. The wide band at 3250 cm-1 was assigned to NH groups of adsorbed molecules perturbed by H-bonding with oxygen. This band is observed as a shoulder of the coupled-OH group band. The large width of the latter as well as its temperature behavior was explained by differences in the arrangement of OH groups and by anharmonic coupling with the low-frequency vibrational modes of the complex.
AB - Dependences of the band maximum and band half-width of the stretching modes of surface OH and OD groups perturbed by ammonia adsorption on Aerosil were studied as functions of sample temperature, amount of adsorbed ammonia, and thermal treatment in vacuum. The appearance of a low-frequency wing was explained by the formation of polymer chains of OH groups coupled via adsorbed molecules. The latter tend to form a second bond with an oxygen atom of the neighboring OH group in addition to a hydrogen bond with a hydroxyl proton via nitrogen. The wide band at 3250 cm-1 was assigned to NH groups of adsorbed molecules perturbed by H-bonding with oxygen. This band is observed as a shoulder of the coupled-OH group band. The large width of the latter as well as its temperature behavior was explained by differences in the arrangement of OH groups and by anharmonic coupling with the low-frequency vibrational modes of the complex.
UR - http://www.scopus.com/inward/record.url?scp=0028465967&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0028465967
VL - 77
SP - 21
EP - 27
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
IS - 1
ER -
ID: 41681330