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Bekiş DF, Küllmey T, Ghazanfari MR, Burda R, Voloshina E, von Randow CA, Fuß F, Liesegang M, Paulus B, Pöppler AC, Thiele G. Ino-Chloridolithates from Ionothermal Synthesis. Inorg Chem 2021; 60:19145-19151. [PMID: 34878258 DOI: 10.1021/acs.inorgchem.1c02943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Anionic lithium-containing species were predicted to impact ionic liquid-based electrochemical applications but have hitherto never been isolated from ionic liquid systems. Here, we report the first representatives of this class of compounds, ino-chloridolithates, comprising [LiCl2]- and [Li2Cl3]- polyanions from ionothermal reactions. Such compounds are obtained at moderate temperatures with imidazolium-based ionic liquids and LiCl. The addition of an auxiliary ammonium salt enhances the lattice energy to yield an ammonium lithate in good yields, which enables extensive investigations including solid-state nuclear magnetic resonance, infrared, and Raman spectroscopy. The structural motifs of ino-lithates are related to ino-silicates, as 1D-extended anionic substructures are formed. Despite this analogy, according to density functional theory calculations with periodic boundary conditions, no evidence of covalent bonding in the anionic moieties is found-indicating packing effects to be the main cause for the formation. Based on an in-depth analysis of the different synthetic parameters, this class of compounds is discussed as an intermediate in ionic liquid applications and could serve as a model system for electrochemical lithium-based systems.
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Affiliation(s)
- Deniz F Bekiş
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Tim Küllmey
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Mohammad R Ghazanfari
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Robert Burda
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Elena Voloshina
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Clara A von Randow
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Friederike Fuß
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
| | - Moritz Liesegang
- Institut für Geologische Wissenschaften, Freie Universität Berlin, Malteserstraße 74-100, 12249 Berlin, Germany
| | - Beate Paulus
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Ann-Christin Pöppler
- Institut für Organische Chemie, Universität Würzburg, Am Hubland 16, 97074 Würzburg, Germany
| | - Günther Thiele
- Fachbereich Biologie, Chemie, Pharmazie, Freie Universität Berlin, Fabeckstraße 34-36, 14195 Berlin, Germany
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