Luminescence spectra and relaxation processes of ReBr 2? 6 in cubic crystals
- 1 January 1978
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 74, 767-774
- https://doi.org/10.1039/f29787400767
Abstract
The Γ8, Γ7(2T2g, t3 2g,)→Γ8(4A2g, t3 2g) luminescence spectra and decay curves for the ReBr2– 6 ion in Rb2SnBr6, Cs2SnBr6, K2SnCl6 and K2PtCl6 have been measured over the temperature range 5–300 K with a range of excitation wavelengths. A scheme for the observed complex relaxation processes is proposed. For the two bromide lattices the vibronic spectra show that the internal vibrational modes of the ReBr2– 6 ion are strongly coupled to the corresponding internal modes of the SnBr2– 6 ion. This cannot occur in the chloride lattices but in this case the ν6 and ν4 ReBr2– 6 modes couple to the transverse and longitudinal optic modes of the lattice.Keywords
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