Ethylene polymerization over chromium complexes grafted onto MCM-41 materials

Abstract

Chromium acetylacetonate [Cr(acac)₃] complexes have been grafted onto the surface of Al-MCM-41 materials and were characterised by combined DRS–EPR spectroscopies and TGA; these materials were found to be active for the polymerisation of ethylene.

References

1. C. T. Kresge, M. E. Leonowicz, W. J. Roth, J. C. Vartuli and J. S. Beck, Nature, 1992, 359, 710.
2. R. Mokaya, W. Jones, Z. Luan, M. D. Alba and J. Klinowski, Catal. Lett., 1996, 37, 113.
3. A. Corma, V. Fornes, M. T. Navarro and J. Perez-Pariente, J. Catal., 1994, 148, 569.
4. R. Mokaya and W. Jones, Chem. Commun., 1998, 1839.
5. (a) S. S. Kim, W. Zhang and T. J. Pinnavaia, Catal. Lett., 1997, 43, 149; (b) I. C. Chisem, J. Rafelt, M. T. Shieh, J. Chisem, J. H. Clark, R. Jachuck, D. Macquarrie, C. Ramshaw and K. Scott, Chem. Commun., 1998, 1949.
6. S. L. Fu, M. P. Rosynek and J. H. Lunsford, Langmuir, 1991, 7, 1179; B. M. Weckhuysen and R. A. Schoonheydt, Catal. Today, 1999 in press.
7. J. Rathousky, A. Zukal, O. Franke and G. Schulz-Ekloff, J. Chem. Soc., Faraday Trans., 1994, 90, 2821.
8. B. M. Weckhuysen, I. E. Wachs and R. A. Schoonheydt, Chem. Rev., 1996, 96, 3327.
9. B. M. Weckhuysen, R. A. Schoonheydt, F. A. Mabbs and D. Collison, J. Chem. Soc., Faraday Trans., 1996, 92, 2431.
10. C. N. R. Rao, Chemical Applications of Infrared Spectroscopy, Academic Press, 1963.