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. 2020 Jan 24;11:490. doi: 10.1038/s41467-019-14274-z

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a The ball and stick representation of PtW₆O₂₄ with the corresponding semitransparent map of molecular electrostatic potential (MEP). b, c High-resolution XPS spectra of Pt and O for PtW₆O₂₄. d 3D representation of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) for [H₆PtW₆O₂₄] and [H₆PtW₆O₂₄]^2e. Additional reduced states are given in Supplementary Fig. 14. e Full and one-half views of the MEP distribution for [H₆PtW₆O₂₄] and [H₆PtW₆O₂₄]^2e: the red and blue or green identify more and less nucleophilic regions for H⁺. Supplementary Table 6 discusses the proton distributions.