Abstract: The surface organoaluminum compounds formed during repeated treatments of silica gel with triethylaluminum (TEA) and dioxygen (method A) and with TEA and water followed by heating in air and in a vacuum (method B) are studied by FTIR spectroscopy. The modification of silica gel using the methods A and B results in the formation of novel surface hydroxyl groups, which are characterized by absorption bands at 3615 and 3690 cm-l. According to the IR-spectroscopic data on CO adsorbed at low temperature, these OH groups are close in their acidity to OH groups of typical aluminosilicates. When using CO as a probe molecule adsorbed at room temperature and at the temperature of liquid nitrogen, the supports prepared by method A contain Lewis acid sites of two types: strong (2228 cm(-1)) and weak (2188 cm(-1)), and the supports prepared by method B also contain Lewis acid sites of a moderate strength (2210 cm(-1)). The concentrations of Lewis acid sites of various types are determined, and data on the influence of the modification procedure and the number of treatments on the concentrations of various Lewis acid sites are obtained.

Cite: Panchenko V.N. , Semikolenova N.V. , Danilova I.G. , Paukshtis E.A. , Zakharov V.A.
IR Spectroscopic Study of Silica Gel Modified by Triethylaluminum under Various Conditions
Kinetics and Catalysis. 1999. V.40. N4. P.556-561. WOS Scopus РИНЦ ANCAN

Original: Панченко В.Н. , Семиколенова Н.В. , Данилова И.Г. , Паукштис Е.А. , Захаров В.А.
Исследование методом ИК-спектроскопии силикагеля, модифицированного триэтилалюминием в различных условиях
Кинетика и катализ. 1999. Т.40. №4. С.617-622. РИНЦ

Dates:

Submitted:

Jan 19, 1998

Identifiers:

Web of science:	WOS:000082321900019
Scopus:	2-s2.0-0042282289
Elibrary:	13317912
Chemical Abstracts:	1999:602705
Chemical Abstracts (print):	131:205229

Citing:

DB	Citing
Web of science	5
Scopus	5
Elibrary	5