Layered tungsten oxide-based organic/inorganic hybrid materials I: Infrared and Raman study

Details Layered tungsten oxide-based organic/inorganic hybrid materials I: Infrared and Raman study Layered tungsten oxide-based organic/inorganic hybrid materials I: Infrared and Raman study

2004-05-12

arxiv.org/abs/cond-mat/0405241v2

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 5 figures

Scientific paper

Tungsten oxide-organic layered hybrid materials have been studied by infrared and Raman spectroscopy, and demonstrate a difference in bonding nature as the length of the interlayer organic `spacer' molecule is increased. Ethylenediamine-tungsten oxide clearly displays a lack of terminal -NH3+ ammonium groups which appear in hybrids with longer alkane molecules, thus indicating that the longer chains are bound by electrostatic interactions as well as or in place of the hydrogen bonding that must be present in the shorter chain ethylenediamine hybrids. The presence of organic molecules between the tungsten oxide layers, compared with the layered tungstic acid H2WO4, shows a decrease in the apical W=O bond strength, as might be expected from the aforementioned electrostatic interaction.

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