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. 2018 May 14;9:1889. doi: 10.1038/s41467-018-04228-2

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© The Author(s) 2018

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. 2 — Chemical analysis of the layers produced by soft landing of [B₁₂Cl₁₂]²⁻ onto FSAM. a In-situ IR spectrum acquired during ion deposition, Ex-situ analysis: b positive and c negative mode nano-DESI MS spectra of the deposited spot showing a distribution of hydrocarbons, and the intact deposited anions, respectively. The peak marked with a star was identified as solvent signal, d ¹¹B NMR signal detected from soft-landed [B₁₂Cl₁₂]²⁻ dissolved in methanol-d4. The chemical shift of [B₁₂Cl₁₂]²⁻ was −13.48 ppm as referenced to an external sample of 189 mM boric acid in D₂O