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  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 195 (1964), S. 12-16 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurden Infrarot-Untersuchungen an verschiedenen Silica-Modifikationen ausgeführt. Wenn man festes Silica an Luft pulvert, werden neue Banden bei 3400 cm−1 und 950 cm−1 unabhängig von der inneren Kristallstruktur beobachtet. Zusätzlich zu diesen Banden ergeben sich weitere in Silica-Gel bei den Frequenzen 3400, 1650, 1120, 950 und 870 cm−1. Die Zuordnung dieser Banden ließ sich mit Deuterierungs-methode und durch Herstellung transparenter Filme von Silica-Gel auf Steinsalzplatten aus Tetramethoxysilan und Wasserdampf erreichen. Die Bande bei 3400 cm−1 entspricht dem νOH von Silanol oder sorbiertem Wasser. 1650 cm−1 dem δOH von sorbiertem Wasser, 1120 cm−1 dem δOH von Silanol, 950 cm−1 den δSiO vom Silanol, 870 cm−1 dem νSiOSi der Brückenbindung an der Oberfläche.
    Notes: Summary Infrared studies were carried out for several silica modifications. On powdering bulk silica in air, new bands were observed to appear at 3400 cm−1 and 950 cm−1 irrespective of its inner crystallographic structure. In addition to the bands observed for bulk silica, bands were observed for silica gel at the following frequencies: 3400, 1650, 1120, 950, and 870 cm−1. Assignment of these band was made by using a deuteration technique and by preparing a transparent film of silica gel on a rock salt plate from tetramethoxy-silane and water vapor. The band at 3400 cm−1 is νOH of silanol or sorbed water; 1650 cm−1, δOH of sorbed water; 1120 cm−1, δOH of silanol; 950 cm−1,ν SiO of slanol; 870 cm−1, νSiOSi of bridged ≡SiOSi≡ link on the surface.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 1964-03-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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