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  Reactivity and Controlled Redox Reactions of Salt-like Intermetallic Compounds in Imidazolium-Based Ionic Liquids

Feng, X.-J., Lerch, S., Biller, H., Micksch, M., Schmidt, M., Baitinger, M., et al. (2021). Reactivity and Controlled Redox Reactions of Salt-like Intermetallic Compounds in Imidazolium-Based Ionic Liquids. ChemistryOpen, 10(2), 205-215. doi:10.1002/open.202000262.

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Feng, Xian-Juan1, Author              
Lerch, Swantje2, Author
Biller, Harry2, Author
Micksch, Maik2, Author
Schmidt, Marcus3, Author              
Baitinger, Michael4, Author              
Strassner, Thomas2, Author
Grin, Yuri5, Author              
Böhme, Bodo6, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2External Organizations, ou_persistent22              
3Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
4Michael Baitinger, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863416              
5Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              
6Bodo Böhme, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863408              

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Free keywords: intermetallic clathrates, ionic liquids, oxidation reactions, redox reactions, Zintl phases
 Abstract: Substituted imidazolium ionic liquids (ILs) were investigated for their reactivity towards Na12Ge17 as a model system containing redox-sensitive Zintl cluster anions. The ILs proved widely inert for imidazolium cations with a 1,2,3-trisubstitution at least by alkyl groups, and for the anion bis(trifluoromethylsulfonyl)azanide (TFSI). A minute conversion of Na12Ge17 observed on long-time contact with such ILs was not caused by dissolution of the salt-like compound, and did thus not provide dissolved Ge clusters. Rather, a cation exchange led to the transfer of Na+ ions into solution. In contrast, by using benzophenone as an oxidizer, heterogeneous redox reactions of Na12Ge17 were initiated, transferring a considerable part of Na+ into solution. At optimized conditions, an X-ray amorphous product NaGe6.25 was obtained, which was thermally convertible to the crystalline type-II clathrate Na24–δGe136 with almost completely Na-filled polyhedral cages, and α-Ge. The presented method thus provides unexpected access to Na24–δGe136 in bulk quantities. © 2021 The Authors. Published by Wiley-VCH GmbH

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Language(s): eng - English
 Dates: 2021-02-102021-02-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/open.202000262
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Title: ChemistryOpen
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 10 (2) Sequence Number: - Start / End Page: 205 - 215 Identifier: ISSN: 2191-1363
CoNE: https://pure.mpg.de/cone/journals/resource/2191-1363