Abstract
The four compounds A3MO4H (A = Rb, Cs; M = Mo, W) are introduced as the first members of the new material class of the transition oxometalate hydrides. The compounds are accessible via a thermal synthesis route with carefully controlled conditions. Their crystal structures were solved by neutron diffraction of the deuterated analogues. Rb3MoO4D, Cs3MoO4D and Cs3WO4D crystallize in the antiperovskite-like K3SO4F-structure type, while Rb3WO4D adopts a different orthorhombic structure. 2H MAS NMR, Raman spectroscopy and elemental analysis prove the abundance of hydride ions next to oxometalate ions and experimental findings are supported by quantum chemical calculations. The tetragonal phases are direct and wide band gap semiconductors arising from hydride states, whereas Rb3WO4H shows a unique, peculiar valence band structure dominated by hydride states.
| Original language | English |
|---|---|
| Pages (from-to) | 7773–7779 |
| Journal | Chemical Science |
| Volume | 13 |
| Issue number | 26 |
| DOIs | |
| Publication status | Published - 25 May 2022 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors thank Christoph Wallach for Raman measurements and Sabine Zeitz for UV/Vis absorption spectroscopy. A. M. and M. B. thank Leonhard Dorsch for packing of the MAS rotors. Bircan Dilki is thanked gratefully for conducting the elemental analysis. We would like to thank the Institut Laue-Langevin for beam time allocated on D2B; https://doi.org/10.5291/ILL-DATA.5-21-1170 and https://doi.org/10.5291/ILL-DATA.EASY-725 . A. M. and N. K. thank the DFG for funding (project number 245845833) within International Research Training Group IRTG 2022—Alberta Technical University of Munich School for Functional Hybrid Materials (ATUMS). A. M. thanks the International Graduate School for Science and Engineering (IGSSE) for support. A. J. K. thanks Academy of Finland for funding (grant 324973) and CSC, the Finnish IT Center for Science for computational resources.
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Dive into the research topics of 'Expanding the hydride chemistry: antiperovskites A3MO4H (A = Rb, Cs; M = Mo, W) introducing the transition oxometalate hydrides'. Together they form a unique fingerprint.Projects
- 1 Finished
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-: Experimental-quantum chemical characterization methods for ionic metal hydrides
Karttunen, A. (Principal investigator)
01/02/2019 → 31/12/2022
Project: Academy of Finland: Other research funding
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