Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-24T01:31:48.186Z Has data issue: false hasContentIssue false
  • English
  • Français

X-Ray Diffraction Patterns of Montmorillonite Oriented Films Exchanged with Enantiomeric and Racemic Tris(2,2′-Bipyridyl)Ruthenium(II)

Published online by Cambridge University Press:  02 April 2024

Gilles Villemure
Gilles Villemure*
Affiliation:
Department of Chemistry, University of New Brunswick, Bag Service #45222, Fredericton, New Brunswick E3B 6E2, Canada
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

X-ray diffraction patterns of oriented films of montmorillonite containing enantiomeric tris(2,2′-bipyridyl) ruthenium(II) chloride (Ru(bpy)22+) show a peak corresponding to basal spacings of approximately 27 Å. This peak is absent from the X-ray patterns of montmorillonite films containing racemic cations. A basal spacing of 27 Å is consistent with the adsorption of 2 layers of the enantiomeric cations in each interlayer space. Under the same condition only one layer of the racemic cation was intercalated (basal spacings of 17.9 Å). These results are in accord with previous reports that montmorillonite can adsorb more of the optical isomers than of the racemic mixture of Ru(bpy)32+. Addition of NaCl to the mixtures resulted in an increase in the level of adsorption of the racemic cations and in the appearance of a peak at 27 Å in the X-ray pattern.

Keywords

Double layerEnantiomorphsIntercalationMonolayerMontmorilloniteSurface areaTris(2,2′-bipyridyl)ruthenium(II)X-rays
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 6 , December 1991 , pp. 580 - 585
Copyright
Copyright © 1991, The Clay Minerals Society

References

Cairns-Smith, A. G., 1982 Genetic Takeover and the Mineral Origins of Life Cambridge Cambridge University Press 34 – 45.Google Scholar
Dwyer, F. P. and Gyarfas, G. C., 1949 The chemistry of ruthenium. Part VII. The oxidation of D and L tris 2,2-dipyridyl ruthenium(II) iodide J. Royal Soc. N.S. Wales 83 173 – 175.Google Scholar
Ghosh, P. K. and Bard, A. J., 1984 Photochemistry of tris(2,2′-bipyridyl)ruthenium(II) in colloidal clay suspensions J. Phys. Chem. 88 5519 – 5526.CrossRefGoogle Scholar
Jackson, M. L., Wittig, L. D. and Pennington, R. P., 1949 Segregation procedure for the mineralogical analysis of soils Soil Sci. Soc. Amer. Proc. 14 77 – 81.CrossRefGoogle Scholar
Jaynes, W. F. and Bigham, J. M., 1986 Multiple cationexchange capacity measurements on standard clays using a commercial mechanical extractor Clays & Clay Minerals 34 93 – 95.CrossRefGoogle Scholar
Joshi, V. and Ghosh, P. K., 1989 Spectral evidence of spontaneous racemic and “pseudoracemic” interactions between optically active poly(pyridyl)metal chelates adsorbed on smectite clays J. Amer. Chem. Soc. 111 5604 – 5612.CrossRefGoogle Scholar
Kalyanasundaram, K., 1982 Photophysics, photochemistry and solar energy conversion with tris (bipyridyl) ruthenium(II) and its analogues Coord. Chem. Rev. 46 159 – 244.CrossRefGoogle Scholar
Thomas, J. K., 1988 Photophysical and photochemical processes on clay surfaces Ace. Chem. Res. 21 275 – 280.CrossRefGoogle Scholar
Traynor, M. F., Mortland, M. M. and Pinnavaia, T. J., 1978 Ion exchange and intercalation reactions of hectorite with tris-bipyridyl metal complexes Clays & Clay Minerals 26 318 – 326.CrossRefGoogle Scholar
Villemure, G., 1990 Effect of negative surface-charge densities of smectite clays on the adsorption isotherms of racemic and enantiomeric tris(2,2′-bipyridyl)ruthenium(II) chloride Clays & Clay Minerals 38 623 – 630.CrossRefGoogle Scholar
Villemure, G. and Bard, A. J., 1990 Clay modified electrodes: 10. Studies of clay-adsorbed Ru(bpy)3 2+ enantiomers by UV-visible spectroscopy and cyclic voltametry J. Electroanal. Chem. 283 403 – 420.CrossRefGoogle Scholar
Villemure, G., Kodama, H. and Detellier, C., 1985 Photoreduction of water by visible light in the presence of montmorillonite Can. J. Chem. 63 1139 – 1142.CrossRefGoogle Scholar
Yamagishi, A., 1987 Optical resolution and asymmetric syntheses by use of adsorption on clay minerals J. Coord. Chem. 16 131 – 211.CrossRefGoogle Scholar
Yamagishi, A., 1985 Racemic adsorption, antiracemization, and induction of optical activity of metal chelates in the presence of colloidal clay Inorg. Chem. 24 1689 – 1695.CrossRefGoogle Scholar
Zhang, X. and Bard, A. J., 1989 In-trough cyclic voltametric studies of Langmuir-Blodgett monolayer of surfactant derivatives of Ru(bpy)3 2+ at an indium tin oxide electrode J. Amer. Chem. Soc. 111 8098 – 8105.CrossRefGoogle Scholar