Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-07T12:19:09.905Z Has data issue: false hasContentIssue false

Group 13-16 Precursors: What Controls Their Volatility?

Published online by Cambridge University Press:  10 February 2011

Edward G. Gillan
Affiliation:
Department of Chemistry, Rice University, Houston, TX 77005
Simon G. Bott
Affiliation:
Department of Chemistry, University of North Texas, Denton, TX 76203
Andrew R. Barron
Affiliation:
Department of Chemistry, Rice University, Houston, TX 77005
Get access

Abstract

The volatility of a series of group 13–16 cubane compounds, [(R)ME]4 (M = Al, Ga; E = S, Se, Te) has been investigated by thermogravimetric analysis. The effects of the M4E4 core, the ligand (R), and molecular packing on the relative sublimation temperature and the activation energy of sublimation are discussed. For any given ligand type (e.g., [(tBu)ME] 4) volatility is dependent on the compound's molecular mass. The volatility of a homologous series (e.g., [(R)GaS] 4) is proposed to be dependent on the interlocking of the ligands in the solid state. In contrast, the energy of activation for sublimation (Ea) may be related to the molecular packing of the cubane cores in the solid state.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] MacInnes, A. N., Power, M. B., and Barron, A. R., Chem. Mater., 4, 11 (1992).Google Scholar
[2] MacInnes, A. N., Power, M. B., and Barron, A. R., Chem. Mater., 5, 1344 (1993).Google Scholar
[3] Barron, A. R. and Rees, W. S. Jr.,, Adv. Mater. Optics Electron., 2, 271 (1993).Google Scholar
[4] Power, M. B., Barron, A. R., Hnyk, D., Robertson, H. E., and Rankin, D. W. H., Adv. Mater. Optics Electron., in press.Google Scholar
[5] In the present study, sublimation temperature is defined as the temperature at which a weight loss equal to 20 % of the original sample has occurred. This assumes a set heating rate and a similar sample size for all compounds measured.Google Scholar
[6] Harlan, C. J., Gravel, P. W., Gillan, E. G., Bott, S. G., and Barron, Andrew R., submitted for publication.Google Scholar
[7] Isomorphous structures are usually defined as those of isostructural compounds crystallizing in the same unit cell and crystal symmetry, and thus having fractional coordinates that are near identical between structures.Google Scholar
[8] Power, M. B. and Barron, A. R., J. Chem. Soc., Chem. Commun., 1315 (1991).Google Scholar
[9] Power, M. B., Ziller, J. W., Tyler, A. N. and Barron, A. R., Organometallics, 11, 1055 (1992).Google Scholar
[10] Gillan, E. G. and Barron, A. R., unpublished results.Google Scholar