Acidity constants of supported salts of heteropoly acids using a methodology related to the potentiometric mass titration technique

Journal of Solution Chemistry

Volumn 35, Issue 3, 2006, Pages 407-423

  Reddy, K Mohan ^a   Lingaiah, N ^a   Sai Prasad, P S ^a   Suryanarayana, I ^a  

^a INDIAN INSTITUTE OF CHEMICAL TECHNOLOGY   (India)

Author keywords

Acid sites; Heteropoly acid salts; Heteropoly acids; pKa; Potentiometric mass titration

Indexed keywords

EID: 33745044023     PISSN: 00959782     EISSN: None     Source Type: Journal    
DOI: 10.1007/s10953-006-9025-1     Document Type: Article

References (40)

1. M. Misono, Heterogeneous Catalysis by Heteropoly Compounds of Molybdenum and Tungsten, Catal. Rev. Sci. Eng. 29, 269-321 (1987).
2. J. B. Moffat, Metal-Oxygen Clusters, The Surface and Catalytic Properties of Heteropolyoxometalates (Kluwer, Newark, NJ, 2001).
3. C. L. Hill (ed.), Introduction: Polyoxometalates-Multicomponent Molecular Vehicles to Probe Fundamental Issues and Practical Problems, Chem. Rev. 98, 1-2 (1998).
4. T. Okuhara, N. Mizuno, and M. Misono, Catalytic Chemistry of Heteropoly Compounds, Adv. Catal. 41, 113-252 (1996).
5. K. Inamaru, A. Ono, H. Kub, and M. Misono, The Structure and Redox Behavior of Vanadium Species in Molybdovanadophosphoric Acid Catalysts During Partial Oxidation of Isobutene, J. Chem. Soc., Faraday Trans. 97, 1765-1770 (1998).
6. I. V. Kozhevnikov, Catalysis by Heteropoly Acids and Multicomponent Polyoxometalates in Liquid-Phase Reactions, Chem. Rev. 98, 171-198 (1998).
7. I. V. Kozhevnikov, Advances in Catalysis by Heteropoly Acids, Russ. Chem. Rev. 56, 811-825 (1987).
8. I. V. Kozhevnikov, Heteropoly Acids in Catalysis, Russ. Chem. Rev. 51, 1875-1896 (1982).
9. I. V. Kozhevnikov, Catalysis by Polyoxometalates. In: Catalyst for Fine Chemicals, vol. 2 (Wiley, Chichester, England, 2002).
10. D. Farcasiu and J. Q. Li, Acidity Measurements on a Heteropolyacid Hydrate in Acetic Acid Solution: A Case of Three Hydrons Ionizing Independently, Rather than Consecutively, J. Catal. 152, 198-203 (1995).
11. 3CN, and Pyridine with the Superacid Perfluorosulfonic Membrane Nafion: An IR and Raman Study, J. Phys. Chem. 99, 11937-11951 (1995).
12. M. N. Timofeeva, Acid Catalysis by Heteropoly Acids, Appl. Catal. A: Gen. 256, 19-35 (2003).
13. 40, Mendeleev Commun. 92-93 (1994).
14. 40 Supported on Carbon, Catal. Lett. 27, 187-197 (1994).
15. 17O NMR, Catal. Lett. 34, 213-221 (1995).
16. 17O MAS NMR Study of 12-Molybdophosphoric Acid, Catal. Lett. 41, 153-157 (1996).
17. M. N. Timofeeva, M. M. Matrosova, G. M. Maksimov, and V. A. Likholobov, A Study of the Acid Properties of Structurally and Compositionally Different Heteropoly Acids in Acetic Acid, Kinet. Katal. 42, 785-790 (2001).
18. M. N. Timofeeva, G. M. Maksimov, and V. A. Likholobov, Acidity of Solutions of Heteropoly Acids with Various Structures and Compositions, Kinet. Katal. 42, 30-34 (2001).
19. G. A. Tsigdinos, and C. J. Hallada, Molybdovanadophosphoric Acids and Their Salts. I. Investigation of Methods of Preparation and Characterization, Inorg. Chem. 7, 437-441 (1968).
20. G. A. Tsigdinos, and C. J. Hallada, Solution Properties of 12-Heteropoly Acids of Molybdenum, Inorg. Chem. 9, 2488-2492 (1970).
21. Z. Zhu, R. Tain, and C. Rhodes, A Study of the Decomposition Behavior of 12-Tungstophosphate Heteropolyacid in Solution, Can. J. Chem. 81, 1044-1050 (2003).
22. L. P. Hammet and A. J. Deyrap, A Series of Simple Basic Indicators. I. The Acidity Functions of Mixtures of Sulphuric and Perchloric Acids with Water, J. Am. Chem. Soc. 54, 2721-2739 (1931);
23. L. P. Hammett, Physical Organic Chemistry, p. 263 (McGraw-Hill, Newark, NJ, 1970).
24. N. A. Polotebnova, A. A. Kozlenko, and L. A. Furtune, A Quantitative Evaluation of the Acidity of Certain Heteropoly Acids in Acetic Acid and Aqueous Solutions, Zh. Neorg. Khim. 21, 2745 (1976).
25. 40, J. Catal. 224, 164-169 (2004).
26. J. A. Dias, J. P. Osegovic, R. S. Drago, The Solid Acidity of 12-Tungstophosphoric Acid, J. Catal. 183, 83-90 (1999);
27. 40, J. Am. Chem. Soc. 119, 7702-7710 (1997).
28. R. Cid, and G. Pecchi, Potentiometric Method for Determining the Number and Relative Strength of Acid Sites in Colored Catalysts, Appl. Catal. 14, 15-21 (1985).
29. P. G. Vazquez, L. R. Pizzio, and M. N. Blanco, Caceres CV Actas 16th Simposio Iberoamericano de Catalisis, Cartagena de Indias, Colombia, vol. 3, p. 2123 (Septembre 1998).
30. L. R. Pizzio, C. V. Caceres, and M. N. Blanco, Acid Catalysts Prepared by Pregnation of Tungstophosphoric Acid Solutions on Different Supports, Appl. Catal. A 167, 283-294 (1998).
31. P. G. Vazquez, M. N. Blanco, and C. V. Caceres, Catalysts Based on Supported 12-Molybdophosphoric Acid, Catal. Lett. 60, 205-215 (1999).
32. L. R. Pizzio, P. G. Vazquez, C. V. Caceres, and M. N. Blanco, Supported Keggin Type Heteropolycompounds for Ecofriendly Reactions, Appl. Catal. A 256, 125-139 (2003).
33. M. A. Castillo, P. G. Vazquez, M. N. Blanco, and C. V. Caceres, Adsorption Studies and Species Characterization in Catalysts Obtained from Aqueous Solutions of Phosphomolybdic Acid and Alumina, J. Chem. Soc., Faraday Trans. 92, 3239-3247 (1996).
34. P. Vazquez, L. Pizzio, C. Caceres, M. Blanco, H. Thomas, E. Alesso, L. Finkielsztein, B. Lantano, G. Moltrasio, and J. Aguirre, Silica-Supported Heteropoly Acids as Catalysts in Alcohol Dehydration Reactions, J. Mol. Catal. A 161, 223-232 (2003).
35. P. Villabrille, G. Romanelli, P. Vázquez, and C. Cáceres, Vanadium-Substituted Keggin Heteropolycompounds as Catalysts for Ecofriendly Liquid Phase Oxidation of 2,6-Dimethylphenol to 2,6-Dimethyl-1,4-Benzoquinone, Appl. Catal. A: Gen. 270, 101-111 (2004).
36. K. Bourikas, J. Vakros, C. Kordulis, and A. Lycourghiotis, Potentiometric Mass Titrations: Experimental and Theoretical Establishment of a New Technique for Determining the Point of Zero Charge (PZC) of Metal (Hydr) Oxides, J. Phys. Chem. B 107, 9441-9451 (2003).
37. J. G. Highfield, and J. B. Moffat, Characterization of 12-Tungstophosphoric Acid and its Salts Using Photoacoustic Spectroscopy in the Infrared Region. I. Thermal Stability and Interactions with Ammonia, J. Catal. 88, 177-184 (1984).
38. R. Drot, C. Lindecker, B. Fourest, and E. Simoni, Surface Characterization of Zirconium and Thorium Phosphate Compounds. New J. Chem. 1105-1109 (1998).
39. E. Lopez-Salinas, J. G. Hernadez-Cortez, L. Schifter, E. Torres-Garcia, J. Navarrete, A. Gutierrez-Carrillo, T. Lopez, P. P. Lottici, and D. Bersani, Thermal Stability of 12-Tungstophosphoric Acid Supported on Zirconia, Appl. Catal. A: Gen. 193, 215-225 (2000).
40. 40) Solvated by Dimethyl Ether, J. Mol. Struct. 444, 213-219 (1998).