Mn(IV)-Substituted Metal(II) Hexafluorido Metallates(IV): Synthesis, Crystal Structures, and Luminescence Properties

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-10-07
Major/Subject
Mcode
Degree programme
Language
en
Pages
3861-3869
Series
European Journal of Inorganic Chemistry, Volume 37
Abstract
We synthesized 16 novel red-emitting Mn(IV)-substituted phosphors of the compositions MgGeF6 : Mn, MgPbF6 : Mn, CaMF6 : Mn (M=Ge, Sn, Pb, Zr, Hf), SrSnF6 : Mn, “SrTiF6 : Mn”, BaPbF6 : Mn, ZnMF6 : Mn (M=Sn, Pb, Zr, Hf), and CdMF6 : Mn (M=Pb, Hf) using a dry-chemical fluorination process completely avoiding hydrofluoric acid. In comparison with the commonly used red-emitter K2SiF6 : Mn (KSF) with its emission maximum at 630.8 nm, all above Ca and Sr compounds and CdHfF6 : Mn show a blue-shift of their emission maxima, the compound SrSnF6 : Mn even by 4.2 nm down to 626.6 nm. The compounds were characterized by powder X-ray diffraction, IR and emission spectroscopy. We additionally present the crystal structures of the unsubstituted compounds CaZrF6, CaHfF6, CaPbF6, CdZrF6, CdHfF6, and MgHfF6, which all crystallize isotypic in the NaSbF6 structure type. The compound “SrTiF6” was characterized by powder XRD and studied with evolutionary structure prediction methods, but its crystal structure could not yet be solved.
Description
Publisher Copyright: © 2021 The Authors. European Journal of Inorganic Chemistry published by Wiley-VCH GmbH
Keywords
Fluorides, Luminescence, Phosphors, Quantum-chemical calculations, Structure elucidation
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Citation
Bandemehr, J, Baumann, D, Seibald, M, Eklund, K, Karttunen, A J & Kraus, F 2021, ' Mn(IV)-Substituted Metal(II) Hexafluorido Metallates(IV): Synthesis, Crystal Structures, and Luminescence Properties ', European Journal of Inorganic Chemistry, vol. 2021, no. 37, pp. 3861-3869 . https://doi.org/10.1002/ejic.202100576