Bačić, Goran, Rankine, Conor D orcid.org/0000-0002-7104-847X, Masuda, Jason D et al. (2 more authors) (2020) Volatile and Thermally Stable Polymeric Tin Trifluoroacetates. Inorganic Chemistry. 996–1005. ISSN 0020-1669
Abstract
Tin trifluoroacetates are effective vapor phase single-source precursors for F-doped SnO2, but their structures have been poorly understood for decades. Here we undertook a comprehensive structural analysis of these compounds in both the solid and gas phases through a combined single-crystal X-ray crystallography, gas phase electron diffraction, and density functional theory investigation. Tin(II) bis(trifluoroacetate) (1) thermally decomposes into a 1:1 mixture of 1 and ditin(II) μ-oxybis(μ-trifluoroacetate) (2) during sublimation, which then polymerize into hexatin(II)-di-μ3-oxyoctakis(μ-trifluoroacetate) (3) upon solidification. Reversible depolymerization occurred readily upon heating, making 3 a useful vapor phase precursor itself. Tin(IV) tetrakis(trifluoroacetate) (5) was also found to be polymeric in the solid state, but it evaporated as a monomer over 130 °C lower than 3. This counterintuitive improvement in volatility by polymerization was possibly due to the large entropy change during sublimation, which offers a strategic new design feature for vapor phase deposition precursors.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 06 Jan 2020 12:10 |
Last Modified: | 18 Dec 2024 00:15 |
Published Version: | https://doi.org/10.1021/acs.inorgchem.9b01308 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/acs.inorgchem.9b01308 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155262 |
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