X-Ray absorption fine structure study of the bound state electronic transitions at the vanadium K and L edges in low symmetry, molecular, vanadium-(IV) and -(V) complexes with oxyoxime and oxyoximate ligands ‡

Abstract

A combination of vanadium K- and L-edge XAFS has been used to characterise a series of monomeric oxovanadium(IV), monomeric dioxovanadium(V) and dimeric oxovanadium(V) complexes with oxyoxime and oxyoximate ligands. The K- and L-edge spectra confirm the presence of V^V in the dimeric species and the L-edge spectra have been used to discriminate between six-co-ordinate V–N–O–V bridged oxovanadium(V) dimers and seven-co-ordinate phenolate bridged oxovanadium(V) dimers containing η²-N–O groups.

References

1. B. K. Teo, EXAFS Basic Principles and Data Analysis, Springer, Berlin, 1986; X-Ray Absorption: Principles, Applications and Techniques of EXAFS, SEXAFS and XANES, eds. D. C. Koningsberger and R. Prins, Wiley, New York, 1988.
2. J. M. Arber, E. De Boer, C. D. Garner, S. S. Hasnain and R. Wever, Biochemistry, 1989, 28, 7968.
3. C. Weidemann, D. Rehder, U. Kuetgens, J. Hormes and H. Vilter, Chem. Phys., 1989, 136, 405.
4. K. H. Hallmeier, R. Szargan, G. Werner, R. Meier and M. A. Sheromov, Spectrochim. Acta, Part A, 1986, 42, 841.
5. J. Wong, F. W. Lytle, R. P. Messmer and D. H. Maylotte, Phys. Rev. B, 1984, 30, 5596.
6. M. O. Krause and J. H. Oliver, J. Phys. Chem. Ref. Data, 1979, 8, 329.
7. G. van der Laan and I. W. Kirkman, J. Phys.: Condens. Matter, 1992, 4, 4189.
8. D. Collison, C. D. Garner, C. M. McGrath, J. F. W. Mosselmans, M. D. Roper, J. M. W. Seddon, E. Sinn and N. A. Young, J. Chem. Soc., Dalton Trans., 1997, 4372 and refs. therein.
9. F. M. F. de Groot, J. Electron Spectrosc. Relat. Phenom., 1994, 67, 529.
10. M. Abbate, H. Pen, M. T. Czyzyk, F. M. F. de Groot, J. C. Fuggle, Y. J. Ma, C.-T. Chen, F. Sette, A. Fujimori, Y. Ueda and K. Kosuge, J. Electron Spectrosc. Relat. Phenom., 1993, 62, 185.
11. M. Abbate, F. M. F. de Groot, J. C. Fuggle, Y. J. Ma, C.-T. Chen, F. Sette, A. Fujimori, Y. Ueda and K. Kosuge, Phys. Rev. B, 1991, 43, 7263.
12. H. F. Pen, L. H. Tjeng, E. Pellergrin, F. M. F. de Groot, G. A. Sawatzky, M. A. van Veenendaal and C.-T. Chen, Phys. Rev. B, 1997, 55, 15 500.
13. E. Goering, O. Müller, M. L. denBoer and S. Horn, Physica B, 1994, 194, 1217.
14. E. Goering, O. Müller, M. Klemm, J. P. Urbach, H. Petersen, C. Jung, M. L. denBoer and S. Horn, Physica B, 1995, 208 and 209, 300.
15. E. Goering, O. Müller, M. Klemm, M. L. denBoer and S. Horn, Phil. Mag. B, 1997, 75, 229.
16. J. G. Chen, C. M. Kim, B. Fruhberger, B. D. de Vries and M. S. Touvelle, Surf. Sci., 1994, 321, 145.
17. F. M. F. de Groot, J. C. Fuggle, B. T. Thole and G. A. Sawatzky, Phys. Rev. B, 1990, 42, 5459.
18. G. Cressey, C. M. B. Henderson and G. van der Laan, Phys. Chem. Min., 1993, 20, 111.
19. P. F. SchoWeld, C. M. B. Henderson, G. Cressey and G. van der Laan, J. Synchrotron Rad., 1995, 2, 93.
20. J. M. Thorpe, Ph.D. Thesis, The University of Manchester, 1992.
21. J. Grigg, Ph.D. Thesis, The University of Manchester, 1995.
22. J. Grigg, D. Collison, C. D. Garner, M. Helliwell and P. A. Tasker, J. Inorg. Biochem., 1993, 51, 172.
23. J. Grigg, D. Collison, C. D. Garner, M. Helliwell, P. A. Tasker and J. M. Thorpe, J. Chem. Soc., Chem. Commun., 1993, 1807.
24. C. D. Garner, D. Collison and E. Pidcock, Philos. Trans. R. Soc. London, Ser. A, 1996, 354, 325.
25. A. Rosenheim and H. Y. Mong, Z. Anorg. Allg. Chem., 1925, 148, 25.
26. N. J. Campbell, M. V. Capparelli, W. P. Griffith and A. C. Skapski, Inorg. Chim. Acta, 1983, 77, L215.
27. R. L. Beddoes, D. Collison, C. D. Garner, J. Grigg, M. Helliwell, P. A. Tasker, D. Thorp and J. M. Thorpe, to be published.
28. V. R. Dhanak, A. W. Robinson, G. van der Laan and G. Thornton, Rev. Sci. Instrum., 1992, 63, 1342.
29. C. S. Mythen, G. van der Laan and H. A. Padmore, Rev. Sci. Instrum., 1992, 63, 1313.
30. G. A. Sawatzky and D. Post, Phys. Rev. B, 1979, 20, 1546.
31. D. Collison, B. Gahan, C. D. Garner and F. E. Mabbs, J. Chem. Soc., Dalton Trans., 1980, 667.
32. D. Collison, C. D. Garner, C. M. McGrath, J. F. W. Mosselmans, E. Pidcock, M. D. Roper, B. G. Searle, J. M. W. Seddon, E. Sinn and N. A. Young, to be published.
33. D. Collison, C. D. Garner, C. M. McGrath, J. F. W. Mosselmans, M. D. Roper, J. M. W. Seddon, E. Sinn and N. A. Young, unpublished work.