Infrared spectra of catalysts and adsorbed molecules
- 20 Downloads
The IR spectrum of dimethyl ether, adsorbed on hydrated and dehydrated surfaces of γ-Al2O3, was studied in the region of 4000-1000 cm−1.
Several forms of adsorption, differing in conditions of formation and thermal stability, were found in the interval 20–450°: adsorption on hydroxyl groups of the surface, bonded by a hydrogen bond; interaction with the formation of a coordination bond (oxygen of the ether with aluminum atom of the lattice); a structure with activation of hydrogen of the methyl group by the surface and carbonate -carboxylate structures.
The “free” hydroxyls of the surface do not take part in adsorption.
Adsorption of dimethyl ether on a dehydrated aluminum oxide surface proceeds with splitting out of water, rehydrating the surface.
KeywordsHydrogen Aluminum Hydrated Hydroxyl Hydrogen Bond
Unable to display preview. Download preview PDF.
- 1.V. I. Yakerson, L. I. Lafer, and A. M. Rubinshtein, Zh. Prikl. Spektroskopii,5, 360 (1966).Google Scholar
- 2.V. I. Yakerson, L. I. Lafer, and A. M. Rubinshtein, Dokl. AN SSSR,173, 622 (1967).Google Scholar
- 3.V. I. Yakerson, L. I. Lafer, and A. M. Rubinshtein, Dokl. AN SSSR,17, 111 (1967).Google Scholar
- 4.E. B. Svetlanov and R. M. Flid, Zh. Fiz. Khimii,40, 3055 (1966).Google Scholar
- 5.L. Bellamy, Infrared Spectra of Complex Molecules [Russian translation], IL, 1963.Google Scholar
- 6.L. I. Lafer and V. I. Yakerson, Zh. Prikl. Spektroskopii,4, 468 (1966).Google Scholar
- 7.J. P. Perchard, M. Th. Forel, and M. L. Josien, J. chim. phys. et phys. chim. biol.,61, 632 (1964).Google Scholar
- 8.M. Falk and E. Whalley, J. Chem. Phys.,34, 554 (1961).Google Scholar
- 9.Y. Kanazawa and K. Nukada, Bull. Chem. Soc. Japan,35, 612 (1962).Google Scholar
- 10.I. M. Ginzburg and M. A. Abramovich, Optics and Spectroscopy, Collection of Articles [in Russian], Izd. AN SSSR (1963), p. 230.Google Scholar
- 11.J. P. Perchard, M. Th. Forel, and M. L. Josien, J. chim. phys. et phys. chim. biol.,61, 645, 652, 660 (1964).Google Scholar
- 12.R. J. Freymann, Spectre infrarouge et structure moleculaires, Paris (1947).Google Scholar
- 13.E. Taillandier and M. Taillandier, Compt. rend.,257, 522 (1963).Google Scholar
- 14.J. M. Begun, W. H. Fletcher, and A. A. Palko, Spectrochim. acta,18, 655 (1962).Google Scholar
- 15.J. Lascomba, J. le Calvé, and M.-Th. Forel, Compt. rend.,258, gr. 6, 611 (1964).Google Scholar
- 16.R. G. Greenler, J. Chem. Phys.,37, 2094 (1962).Google Scholar
- 17.V. N. Filimonov, Collection: Elementary Photo Processes in Molecules [in Russian], “Nauka,” 330 (1966).Google Scholar
- 18.L. Szobei, Compt. rend.,218, 315, 834 (1944).Google Scholar
- 19.Spectroscopic Methods in the Chemistry of Complex Compounds, Collection of Articles Edited by V. M. Vdovenko [in Russian], “Khimiya,” 136 (1964).Google Scholar
- 20.K. Nakamoto, Infrared Spectra of Inorganic and Coordination Compounds [Russian translation], “Mir,” 1966.Google Scholar