Electrochemical behavior of a series of undecatungstozincates monosubstituted by first-row transition metals, ZnW₁₁M(H₂O)O₃₉^n– (M = Cr, Mn, Fe, Co, Ni, Cu or Zn)

Abstract

The electrochemical behavior of a series of undecatungstozincates monosubstituted by first-row transition metals, ZnW₁₁M(H₂O)O₃₉^n– (M = Cr, Mn, Fe, Co, Ni, Cu or Zn), was investigated systematically and comparably in aqueous solutions by electrochemical and in situ UV-visible-near-IR spectroelectrochemical methods. These compounds exhibit not only successive reduction processes of the addenda atoms (W) in a negative potential range, but some of them also involve redox reactions originating from the substituted transition metals (M) such as the reduction of Fe^III and Cu^II at less negative potentials and the oxidation of Mn^II at a more positive potential. Some interesting results and phenomena, especially of the transition metals, were found for the first time. Moreover, possible reaction mechanisms are proposed based on the experimental results.

References

1. M. T. Pope, Heteropoly and isopoly oxometalates, Springer, New York, 1983.
2. M. T. Pope and A. Muller, Angew. Chem., Int. Ed. Engl., 1991, 30, 34.
3. (a) C. L. Hill (Guest editor), Chem. Rev., 1998, 98, No. 1 (the full book); (b) M. Sadakane and E. Steckhan, Chem. Rev., 1998, 98, 219.
4. D. E. Katsoulis and M. T. Pope, (a)J. Chem. Soc., Chem. Commun., 1986, 1186; (b)J. Chem. Soc., Chem. Commun., 1989, 1483; (c)J. Am. Chem. Soc., 1984, 106, 2737.
5. C. L. Hill and R. B. Brown, J. Am. Chem. Soc., 1986, 108, 536.
6. (a) D. K. Lyon, W. K. Miller, T. Novet, P. J. Domaille, E. Evitt, D. C. Johnson and R. C. Finke, J. Am. Chem. Soc., 1991, 113, 7209; (b) D. Mansuy, J.-F. Bartoli, P. Battioni, D. K. Lyon and R. C. Finke, J. Am. Chem. Soc., 1991, 113, 7222.
7. R. Neumann and C. Abu-Gnim, (a)J. Chem. Soc., Chem. Commun., 1989, 1324; (b)J. Am. Chem. Soc., 1990, 112, 6025.
8. (a) Y. G. Chen and J. F. Liu, Polyhedron, 1996, 15, 3433; (b) L. Meng and J. F. Liu, Transition Met. Chem., 1995, 20, 188; (c) J. F. Liu, Y. Wang, Q. H. Yang, Y. G. Chen, M. X. Li, C. G. Liu and S. T. Yang, Polyhedron, 1996, 15, 717; (d) J. F. Liu, X. P. Zhang, F. Q. Wang, G. P. Li, Q. H. Yang and J. P. Wang, Chem. Res. Chin. Univ., 1995, 11, 1; (e) J. F. Liu, F. Q. Wang, Y. Wang, Q. H. Yang, W. Wang and X. H. Zhu, Transition Met. Chem., 1995, 20, 81.
9. E. Codot, M. Fournier, A. Teze and G. Herve, Inorg. Chem., 1996, 35, 282.
10. J. F. Liu, F. Ortega, P. Sethuraman, D. E. Katsoulis, C. E. Costello and M. T. Pope, J. Chem. Soc., Dalton Trans., 1992, 1901.
11. C. Rong and F. C. Anson, Inorg. Chem., 1994, 33, 1064.
12. C. M. Tourne, G. F. Tourne, S. M. Malik and T. J. R. Weakley, J. Inorg. Nucl. Chem., 1970, 32, 3875.
13. (a) X. Y. Zhang, M. T. Pope, M. R. Chance and G. B. Jameson, Polyhedron, 1995, 14, 1381; (b) X. Y. Zhang, G. B. Jameson, C. J. O'Connor and M. T. Pope, Polyhedron, 1996, 15, 917; (c) X. Y. Zhang, C. J. O'Connor, G. B. Jameson and M. T. Pope, Inorg. Chem., 1996, 35, 30.
14. (a) F. Zonnevijlle, C. M. Tourne and G. F. Tourne, Inorg. Chem., 1982, 21, 2742; (b) F. Zonnevijlle, C. M. Tourne and G. F. Tourne, Inorg. Chem., 1982, 21, 2751; (c) R. Contant, M. Abbessi, J. Canny, A. Belhouari, B. Keita and L. Nadjo, Inorg. Chem., 1997, 36, 4961.
15. W. Sun, H. Liu, J. Kong, G. Xie and J. Deng, J. Electroanal. Chem. Interfacial Electrochem., 1997, 437, 67; W. Sun, F. Yang, H. Liu, J. Kong, S. Jin, G. Xie and J. Deng, J. Electroanal. Chem. Interfacial Electrochem., 1998, 451, 49.
16. (a) F. Ortega and M. T. Pope, Inorg. Chem., 1984, 23, 3292; (b) C. Rong and M. T. Pope, J. Am. Chem. Soc., 1992, 114, 2932.
17. (a) J. C. Bart and F. C. Anson, J. Electroanal. Chem. Interfacial Electrochem., 1995, 390, 11; (b) J. E. Toth and F. C. Anson, J. Electroanal. Chem. Interfacial Electrochem., 1988, 256, 361; (c) J. E. Toth and F. C. Anson, J. Am. Chem. Soc., 1989, 111, 2444; (d) J. E. Toth, J. D. Melton, D. Cabelli, B. H. J. Bielski and F. C. Anson, Inorg. Chem., 1990, 29, 1952; (e) K. K. Shiu and F. C. Anson, J. Electroanal. Chem. Interfacial Electrochem., 1991, 309, 115.
18. M. Sadakane and E. Steckhan, J. Mol. Catal. A, 1996, 114, 221.
19. A. Muller, L. Dloczik, E. Diemann and M. T. Pope, Inorg. Chim. Acta, 1997, 257, 231.
20. S. Dong and M. J. Liu, J. Electroanal. Chem. Interfacial Electrochem., 1994, 372, 95.
21. (a) B. Fabre, G. Bidan and M. Laplowski, J. Chem. Soc., Chem. Commun., 1994, 1509; (b) B. Fabre and G. Bidan, J. Chem. Soc., Faraday Trans., 1997, 591; (c) T. McCormac, B. Fabre and G. Bidan, J. Electroanal. Chem. Interfacial Electrochem., 1997, 425, 49; (d) T. McCormac, B. Fabre and G. Bidan, J. Electroanal. Chem. Interfacial Electrochem., 1997, 427, 155.
22. S. Dong and B. Wang, Electrochim. Acta, 1992, 37, 11; J. Electroanal. Chem. Interfacial Electrochem. 1992328245; S. Dong and W. Jin, J. Electroanal. Chem. Interfacial Electrochem., 1993, 354, 87; S. Dong, X. Xi and M. Tian, J. Electroanal. Chem. Interfacial Electrochem., 1995, 385, 227; L. Cheng, X. Zhang, X. Xi, B. Liu and S. Dong, J. Electroanal. Chem. Interfacial Electrochem., 1996, 407, 97.
23. K. Nomiya and M. Miwa, Polyhedron, 1983, 2, 955.
24. H. R. Sun, S. Y. Zhang, J. Q. Xu, G. Y. Yang and T. S. Shi, J. Electroanal. Chem. Interfacial Electrochem., 1998, 455, 57.
25. M. A. Baldo, C. Bragato, G. A. Mazzocchin and S. Daniele, Electrochim. Acta, 1998, 43, 3413.
26. (a) M. M. Bernardo, P. V. Robandt, R. R. Schroeder and D. B. Rorabacher, J. Am. Chem. Soc., 1989, 111, 1224; (b) N. M. Villeneuve, R. R. Schroeder, L. Z. Ochrymowycz and D. B. Rorabacher, Inorg. Chem., 1997, 36, 4475.
27. J. M. Fernandez-G, S. Hernandez-Ortega, R. Cetina-Rosado, N. Macias-Ruvalcaba and M. Aguilar-Martinez, Polyhedron, 1998, 17, 2425.