Thermal Properties and Ion Mobility in Complex Antimony(III)
Fluorides with -Amino Acids

V. Ya. Kavun^a, N. A. Didenko^a, N. V. Makarenko^a, A. B. Slobodyuk^a,
E. B. Merkulov^a, N. F. Uvarov^b, and L. A. Zemnukhova^a

^a Institute of Chemistry, Far-East Branch, Russian Academy of Sciences,
pr. Stoletiya Vladivostoka 159, Vladivostok, 690022 Russia

^b Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences,
ul. Kutateladze 18, Novosibirsk, 630128 Russia

Received June 24, 2011

Abstract—Differential thermal analysis (DTA) and (¹⁹F, ¹H) NMR spectroscopy were used to study thermal
properties and ion mobility in complex antimony(III) fluorides with amino acids of composition
[(CH₃)₂CH(CH₂)CH(NH₃)COOH]SbF₄ (LeuHSbF₄), SbF₃[(CH₃)₂CH(CH₂)CH(⁺NH₃)COO^–] (SbF₃ Leu), and
SbF₃[(CH₃)₂CHCH(⁺NH₃)COO^–] (SbF₃ Val). Ionic conductivity in L-leucinium tetrafluoroantimonate(III)
was studied using impedance spectroscopy. LeuHSbF₄ was found to undergo a diffusion phase transition to a
relatively highly conductive state in the range 385–415 K with an attendant loss of thermal stability (softening)
of the high-temperature phase.

DOI: 10.1134/S0036023612090100

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