Structural modifications of Cu(II) 12-tungstophosphoric acid salit studied by IR and Raman spectroscopy
Autor: | Marija Todorović, Zoran Nedic, B Ubavka Mioc, Snezana Uskokovic-Markovic, Vojislav R. Stamenkovic, Tamara Cajkovski |
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Předmět: |
Structural phase
Materials science Infrared spectroscopy 02 engineering and technology 010402 general chemistry 01 natural sciences lcsh:Chemistry symbols.namesake phase transformations IR spectra Protein secondary structure 12-tungstophosphoric acid heteropoly compounds General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:QD1-999 Copper salt symbols Physical chemistry Raman spectra proton conductors 0210 nano-technology Raman spectroscopy Powder diffraction |
Zdroj: | Scopus-Elsevier Journal of the Serbian Chemical Society Journal of the Serbian Chemical Society, Vol 65, Iss 5-6, Pp 407-415 (2000) |
Popis: | 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. U ovom radu ispitivani su lokalni procesi i strukturne fazne transformacije soli bakra 12-volframfosforne kiseline. Strukturne fazne transformacije praćene su preko traka karakterističnih za kristalnu rešetku u infracrvenim i ramanskim spektrima. Rezultati ovih ispitivanja, kao i oni dobiveni rendgeno-strukturnom analizom i iz impedansnih merenja, odnosno provodljivost u funkciji temperature, pokazuju da je fazna transformacija vezana za promene lokalne strukture, tj. sekundarne strukture Keginovih anjona. PR Projekat Ministarstva nauke Republike Srbije. |
Databáze: | OpenAIRE |
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