TY  - JOUR
AU  - Mioč, Ubavka B.
AU  - Todorović, M
AU  - Uskoković-Marković, S
AU  - Nedić, Zoran
AU  - Stamenkovic, V
AU  - Cajkovski, T
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6292
AB  - In this paper local processes and structural phase transformations of the copper salt of 12-tungstophosphoric acid are investigated. The structural phase transformations were followed through bands, characteristic for the host lattice, in the IR and Raman spectra. The results of these investigations, as well as those of XRPD analysis and impedance measurements as a function of temperature show that some local processes provoke the change in the secondary structure of the Keggin anions.
T2  - Journal of the Serbian Chemical Society
T1  - Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy
VL  - 65
IS  - 5-6
SP  - 407
EP  - 415
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6292
ER  - 

@article{
author = "Mioč, Ubavka B. and Todorović, M and Uskoković-Marković, S and Nedić, Zoran and Stamenkovic, V and Cajkovski, T",
year = "2000",
abstract = "In this paper local processes and structural phase transformations of the copper salt of 12-tungstophosphoric acid are investigated. The structural phase transformations were followed through bands, characteristic for the host lattice, in the IR and Raman spectra. The results of these investigations, as well as those of XRPD analysis and impedance measurements as a function of temperature show that some local processes provoke the change in the secondary structure of the Keggin anions.",
journal = "Journal of the Serbian Chemical Society",
title = "Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy",
volume = "65",
number = "5-6",
pages = "407-415",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6292"
}

Mioč, U. B., Todorović, M., Uskoković-Marković, S., Nedić, Z., Stamenkovic, V.,& Cajkovski, T.. (2000). Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy. in Journal of the Serbian Chemical Society, 65(5-6), 407-415.
https://hdl.handle.net/21.15107/rcub_vinar_6292

Mioč UB, Todorović M, Uskoković-Marković S, Nedić Z, Stamenkovic V, Cajkovski T. Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy. in Journal of the Serbian Chemical Society. 2000;65(5-6):407-415.
https://hdl.handle.net/21.15107/rcub_vinar_6292 .

Mioč, Ubavka B., Todorović, M, Uskoković-Marković, S, Nedić, Zoran, Stamenkovic, V, Cajkovski, T, "Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy" in Journal of the Serbian Chemical Society, 65, no. 5-6 (2000):407-415,
https://hdl.handle.net/21.15107/rcub_vinar_6292 .

TY  - JOUR
AU  - Mioč, Ubavka B.
AU  - Milonjić, Slobodan K.
AU  - Stamenkovic, V
AU  - Radojevic, M
AU  - Colomban, P
AU  - Mitrovic, MM
AU  - Dimitrijevic, R
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6284
AB  - Preparation of aluminosilicate gels bulk, containing 12-tungstophosphoric acid (WPA) in mesopores, as well as their structural and conduction characteristics are reported. Doped gels are prepared from aluminum-silicon alkoxide AlSi(OR)(x), iso-propanol, water and WPA . 29H(2)O mixtures. Characteristics of the obtained doped gels depend on the WPA content. Results such as WPA-filled mesopores and infra red (IR) band shifts indicate differences with respect to material obtained by mechanical alloying and interaction between the WPA and aluminosilicate host framework. According to the obtained results, especially of the higher conductivity (sigma similar to 10(-3) S/cm), WPA-doped aluminosilicate gel is a promising material for solid electrolytes. (C) 1999 Published by Elsevier Science B.V, All rights reserved.
T2  - Solid State Ionics
T1  - Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels
VL  - 125
IS  - 1-4
SP  - 417
EP  - 424
DO  - 10.1016/S0167-2738(99)00204-0
ER  - 

@article{
author = "Mioč, Ubavka B. and Milonjić, Slobodan K. and Stamenkovic, V and Radojevic, M and Colomban, P and Mitrovic, MM and Dimitrijevic, R",
year = "1999",
abstract = "Preparation of aluminosilicate gels bulk, containing 12-tungstophosphoric acid (WPA) in mesopores, as well as their structural and conduction characteristics are reported. Doped gels are prepared from aluminum-silicon alkoxide AlSi(OR)(x), iso-propanol, water and WPA . 29H(2)O mixtures. Characteristics of the obtained doped gels depend on the WPA content. Results such as WPA-filled mesopores and infra red (IR) band shifts indicate differences with respect to material obtained by mechanical alloying and interaction between the WPA and aluminosilicate host framework. According to the obtained results, especially of the higher conductivity (sigma similar to 10(-3) S/cm), WPA-doped aluminosilicate gel is a promising material for solid electrolytes. (C) 1999 Published by Elsevier Science B.V, All rights reserved.",
journal = "Solid State Ionics",
title = "Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels",
volume = "125",
number = "1-4",
pages = "417-424",
doi = "10.1016/S0167-2738(99)00204-0"
}

Mioč, U. B., Milonjić, S. K., Stamenkovic, V., Radojevic, M., Colomban, P., Mitrovic, M.,& Dimitrijevic, R.. (1999). Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels. in Solid State Ionics, 125(1-4), 417-424.
https://doi.org/10.1016/S0167-2738(99)00204-0

Mioč UB, Milonjić SK, Stamenkovic V, Radojevic M, Colomban P, Mitrovic M, Dimitrijevic R. Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels. in Solid State Ionics. 1999;125(1-4):417-424.
doi:10.1016/S0167-2738(99)00204-0 .

Mioč, Ubavka B., Milonjić, Slobodan K., Stamenkovic, V, Radojevic, M, Colomban, P, Mitrovic, MM, Dimitrijevic, R, "Structural properties and proton conductivity of the 12-tungstophosphoric acid doped aluminosilicate gels" in Solid State Ionics, 125, no. 1-4 (1999):417-424,
https://doi.org/10.1016/S0167-2738(99)00204-0 . .

TY  - JOUR
AU  - Čajkovski, Tamara
AU  - Davidović, Milorad P.
AU  - Čajkovski, D.
AU  - Likar-Smiljanić, Vladana D.
AU  - Biljić, Radivoje M.
AU  - Mioč, Ubavka B.
AU  - Stamenković, Vojislav R.
PY  - 1998
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2180
AB  - Heteropolyacids hydrates as superionic conductors have been intensely investigated during the last fifteen years. By using various experimental techniques such as IR and Raman spectroscopy, neutron scattering, impedance measurements, X-ray diffraction and others, informations have been obtained on the properties of protonic entities and conductivity mechanisms. The salts of heteropolyacids have been less investigated although there is a steady growth of activities in this field too. In this work the results of permittivity measurements are presented on copper and calcium salts of 12-tungstophosphoric acid hydrates (CuHPW12O40. 15H(2)O and CaHPW12O40. 13H(2)O). Measurements have been done in the region of microwaves, at room temperature and in a room ambient. The aim of this work was to study the influence of copper and calcium ions on dielectric relaxation processes in these salts. Dielectric relaxations have been found for both salts. Contributions of fast reorientations of H2O molecules and oxonium ions (H3O+) to these relaxations are discussed as well as, their influence on dynamic conductivity.
T2  - Solid State Phenomena
T1  - Dielectric properties of metal salts of heteropolyacid hydrates
VL  - 61-2
SP  - 279
EP  - 283
DO  - 10.4028/www.scientific.net/ssp.61-62.279
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2180
ER  - 

@article{
author = "Čajkovski, Tamara and Davidović, Milorad P. and Čajkovski, D. and Likar-Smiljanić, Vladana D. and Biljić, Radivoje M. and Mioč, Ubavka B. and Stamenković, Vojislav R.",
year = "1998",
abstract = "Heteropolyacids hydrates as superionic conductors have been intensely investigated during the last fifteen years. By using various experimental techniques such as IR and Raman spectroscopy, neutron scattering, impedance measurements, X-ray diffraction and others, informations have been obtained on the properties of protonic entities and conductivity mechanisms. The salts of heteropolyacids have been less investigated although there is a steady growth of activities in this field too. In this work the results of permittivity measurements are presented on copper and calcium salts of 12-tungstophosphoric acid hydrates (CuHPW12O40. 15H(2)O and CaHPW12O40. 13H(2)O). Measurements have been done in the region of microwaves, at room temperature and in a room ambient. The aim of this work was to study the influence of copper and calcium ions on dielectric relaxation processes in these salts. Dielectric relaxations have been found for both salts. Contributions of fast reorientations of H2O molecules and oxonium ions (H3O+) to these relaxations are discussed as well as, their influence on dynamic conductivity.",
journal = "Solid State Phenomena",
title = "Dielectric properties of metal salts of heteropolyacid hydrates",
volume = "61-2",
pages = "279-283",
doi = "10.4028/www.scientific.net/ssp.61-62.279",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2180"
}

Čajkovski, T., Davidović, M. P., Čajkovski, D., Likar-Smiljanić, V. D., Biljić, R. M., Mioč, U. B.,& Stamenković, V. R.. (1998). Dielectric properties of metal salts of heteropolyacid hydrates. in Solid State Phenomena, 61-2, 279-283.
https://doi.org/10.4028/www.scientific.net/ssp.61-62.279
https://hdl.handle.net/21.15107/rcub_vinar_2180

Čajkovski T, Davidović MP, Čajkovski D, Likar-Smiljanić VD, Biljić RM, Mioč UB, Stamenković VR. Dielectric properties of metal salts of heteropolyacid hydrates. in Solid State Phenomena. 1998;61-2:279-283.
doi:10.4028/www.scientific.net/ssp.61-62.279
https://hdl.handle.net/21.15107/rcub_vinar_2180 .

Čajkovski, Tamara, Davidović, Milorad P., Čajkovski, D., Likar-Smiljanić, Vladana D., Biljić, Radivoje M., Mioč, Ubavka B., Stamenković, Vojislav R., "Dielectric properties of metal salts of heteropolyacid hydrates" in Solid State Phenomena, 61-2 (1998):279-283,
https://doi.org/10.4028/www.scientific.net/ssp.61-62.279 .,
https://hdl.handle.net/21.15107/rcub_vinar_2180 .

TY  - JOUR
AU  - Mioč, Ubavka B.
AU  - Milonjić, Slobodan K.
AU  - Malović, D
AU  - Stamenkovic, V
AU  - Colomban, P
AU  - Mitrovic, MM
AU  - Dimitrijevic, R
PY  - 1997
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7235
AB  - Sol-gel syntheses offer a wide range of possibilities for introduction of materials with specific properties (electronic, optic and ion-conductive, etc.) into optically clear matrices. Preparation of silica gel bulk, containing 12-tungstophosphoric acid (WPA) in mesopores, as well as its structural and conduction characteristics are reported. Characteristics of the obtained doped gels depend on the gel preparation, gelation process and the WPA content. According to the obtained results, especially for the high conductivity (sigma similar to 0.1 S/cm), WPA doped silica gel is a promising material for solid electrolytes.
T2  - Solid State Ionics
T1  - Structure and proton conductivity of 12-tungstophosphoric acid doped silica
VL  - 97
IS  - 1-4
SP  - 239
EP  - 246
DO  - 10.1016/S0167-2738(97)00089-1
ER  - 

@article{
author = "Mioč, Ubavka B. and Milonjić, Slobodan K. and Malović, D and Stamenkovic, V and Colomban, P and Mitrovic, MM and Dimitrijevic, R",
year = "1997",
abstract = "Sol-gel syntheses offer a wide range of possibilities for introduction of materials with specific properties (electronic, optic and ion-conductive, etc.) into optically clear matrices. Preparation of silica gel bulk, containing 12-tungstophosphoric acid (WPA) in mesopores, as well as its structural and conduction characteristics are reported. Characteristics of the obtained doped gels depend on the gel preparation, gelation process and the WPA content. According to the obtained results, especially for the high conductivity (sigma similar to 0.1 S/cm), WPA doped silica gel is a promising material for solid electrolytes.",
journal = "Solid State Ionics",
title = "Structure and proton conductivity of 12-tungstophosphoric acid doped silica",
volume = "97",
number = "1-4",
pages = "239-246",
doi = "10.1016/S0167-2738(97)00089-1"
}

Mioč, U. B., Milonjić, S. K., Malović, D., Stamenkovic, V., Colomban, P., Mitrovic, M.,& Dimitrijevic, R.. (1997). Structure and proton conductivity of 12-tungstophosphoric acid doped silica. in Solid State Ionics, 97(1-4), 239-246.
https://doi.org/10.1016/S0167-2738(97)00089-1

Mioč UB, Milonjić SK, Malović D, Stamenkovic V, Colomban P, Mitrovic M, Dimitrijevic R. Structure and proton conductivity of 12-tungstophosphoric acid doped silica. in Solid State Ionics. 1997;97(1-4):239-246.
doi:10.1016/S0167-2738(97)00089-1 .

Mioč, Ubavka B., Milonjić, Slobodan K., Malović, D, Stamenkovic, V, Colomban, P, Mitrovic, MM, Dimitrijevic, R, "Structure and proton conductivity of 12-tungstophosphoric acid doped silica" in Solid State Ionics, 97, no. 1-4 (1997):239-246,
https://doi.org/10.1016/S0167-2738(97)00089-1 . .