This article is cited in 4 papers

Spectroscopy of condensed matter

Luminescence and thermochromic properties of complexes of tellurium(IV) halides with rubidium Rb$_{2}$TeHal$_{6}$ (Hal = Cl, Br, I)

T. V. Sedakova, A. G. Mirochnik

Institute of Chemistry, Far East Branch of the Russian Academy of Sciences, Vladivostok

Abstract: Spectral-luminescence properties of complex compounds of the composition Rb$_{2}$TeHal$_{6}$ (Hal = Cl, Br, I) have been investigated. The dependence of the luminescence intensity on the geometric structure of the tellurium(IV) coordination polyhedron of the anion sublattice type and the position of the $A$-band in the spectra has been revealed. Rb$_{2}$TeCl$_{6}$ has exhibited the maximum luminescence intensity at 77 and 300 K for isle-like octahedral coordination of the Te(IV) ion. Rb$_{2}$TeCl$_{6}$ and Cs$_{2}$TeBr$_{6}$ have demonstrated a reversible thermochromism determined by the temperature dependence of the Jahn–Teller splitting of the $A$-band in the absorption (reflection) spectra of the tellurium(IV) ion.

Keywords: tellurium(IV), complexes, luminescence, thermochromism.

Received: 20.01.2020
Revised: 20.01.2020
Accepted: 23.06.2020

DOI: 10.21883/OS.2020.10.50014.8-20

 English version: Optics and Spectroscopy, 2020, 128:10, 1566–1571

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