TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Todorović, Marija R.
AU  - Mioč, Ubavka B.
AU  - Zakrzewska, Joanna
AU  - Uskoković-Marković, Snežana
PY  - 2008
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1031
AB  - The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0. the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5-7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.
PB  - Canadian Science Publishing, Nrc Research Press, Ottawa
T2  - Canadian Journal of Chemistry
T1  - Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution
VL  - 86
IS  - 10
SP  - 996
EP  - 1004
DO  - 10.1139/V08-138
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Todorović, Marija R. and Mioč, Ubavka B. and Zakrzewska, Joanna and Uskoković-Marković, Snežana",
year = "2008",
abstract = "The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0. the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5-7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.",
publisher = "Canadian Science Publishing, Nrc Research Press, Ottawa",
journal = "Canadian Journal of Chemistry",
title = "Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution",
volume = "86",
number = "10",
pages = "996-1004",
doi = "10.1139/V08-138"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Todorović, M. R., Mioč, U. B., Zakrzewska, J.,& Uskoković-Marković, S.. (2008). Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. in Canadian Journal of Chemistry
Canadian Science Publishing, Nrc Research Press, Ottawa., 86(10), 996-1004.
https://doi.org/10.1139/V08-138

Holclajtner-Antunović I, Bajuk-Bogdanović D, Todorović MR, Mioč UB, Zakrzewska J, Uskoković-Marković S. Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. in Canadian Journal of Chemistry. 2008;86(10):996-1004.
doi:10.1139/V08-138 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Todorović, Marija R., Mioč, Ubavka B., Zakrzewska, Joanna, Uskoković-Marković, Snežana, "Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution" in Canadian Journal of Chemistry, 86, no. 10 (2008):996-1004,
https://doi.org/10.1139/V08-138 . .

TY  - CONF
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Zakrzewska, Joanna
PY  - 2008
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1028
PB  - Amer Chemical Soc, Washington
C3  - Abstracts of Papers of the American Chemical Society
T1  - AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses
VL  - 236
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1028
ER  - 

@conference{
author = "Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Zakrzewska, Joanna",
year = "2008",
publisher = "Amer Chemical Soc, Washington",
journal = "Abstracts of Papers of the American Chemical Society",
title = "AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses",
volume = "236",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1028"
}

Uskoković-Marković, S., Holclajtner-Antunović, I., Bajuk-Bogdanović, D.,& Zakrzewska, J.. (2008). AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses. in Abstracts of Papers of the American Chemical Society
Amer Chemical Soc, Washington., 236.
https://hdl.handle.net/21.15107/rcub_farfar_1028

Uskoković-Marković S, Holclajtner-Antunović I, Bajuk-Bogdanović D, Zakrzewska J. AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses. in Abstracts of Papers of the American Chemical Society. 2008;236.
https://hdl.handle.net/21.15107/rcub_farfar_1028 .

Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Zakrzewska, Joanna, "AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses" in Abstracts of Papers of the American Chemical Society, 236 (2008),
https://hdl.handle.net/21.15107/rcub_farfar_1028 .