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Journal of Structural Chemistry

2016 year, number 5

Proton State in Hydrated Fluoro-Substituted Brownmillerites Ba2In2O5-0.5yFy·nН2О

I.E. Animitsa1, N.A. Tarasova1, T.A. Denisova2, Ya.V. Baklanova2
1El`tsin Ural Federal University, Ekaterinburg, Russia
2Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia
Keywords: браунмиллерит, анионное допирование, MAS ЯМР Н, колебательная спектроскопия, протонная подвижность, brownmillerite, anion doping, Н MAS NMR , vibrational spectroscopy, proton mobility


Solid solutions Ba2In2O5-0.5yFy with the structure of brownmillerite are studied by IR and 1Н MAS NMR spectroscopy. During the fluorine doping the nearest oxygen environment of indium atoms is distorted and a part of In-O bonds is shortened. It is shown that partial fluoride ion substitution for oxygen atoms results in an increase in the proton mobility in hydrated Ba2In2O5-0.5yFy x nН2О phases.