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Comparative assessment of ESI‐MS softness for inorganic complexes: how soft is your ESI‐MS?

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1002/ejic.202400077
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0003-0578-9701; Search for: 1ORCID identifier: https://orcid.org/0000-0001-5148-5587; Search for: 1; Search for: 2ORCID identifier: https://orcid.org/0000-0002-3472-9284; Search for: 3ORCID identifier: https://orcid.org/0000-0002-5680-2112; Search for: 4ORCID identifier: https://orcid.org/0000-0002-1468-2714; Search for: 5; Search for: 1ORCID identifier: https://orcid.org/0000-0001-7073-5246
Affiliation
  1. University of Victoria. Department of Chemistry
  2. Trent University
  3. National Research Council Canada. Metrology Research Centre
  4. University of Ottawa. Department of Chemistry and Biomolecular Sciences
  5. University of British Columbia. Department of Chemistry
FunderSearch for: Institute of Coal Chemistry; Search for: Natural Sciences and Engineering Research Council of Canada; Search for: Universities Space Research Association; Search for: University of Victoria; Search for: Trent University
FormatText, Article
Subjectcoordination complexes; electrospray ionization; instrument optimization; ion fragmentation; mass spectrometry
Abstract
Electrospray ionization mass spectrometry (ESI-MS) is a powerful tool for identifying and characterizing organometallic and coordination compounds. However, detection of fragile structures bound by weaker intermolecular forces can be significantly limited in ESI-MS owing to the use of relatively harsh instrument conditions and configurations. In this study, a set of tests was developed to assess the softness of ESI-MS systems. Two variants are presented: positive ion mode, utilizing a mixture of sodium ions and triphenylphosphine oxide producing [Na(OPPh₃)n]⁺ ions (n=1–4), and negative ion mode utilizing Pd(PPh₃)₄ and sulfonated triphenylphosphine producing [Pd(L)(PPh₃)n]⁻ ions (n=0–2), where softer instrument conditions preserve a higher proportion of the high-coordinate ions and harsher conditions will result in increased detection of products of ion fragmentation. The results revealed notable variations in instrument softness, which were influenced by a combination of instrument design and experimental parameters. Meticulously optimizing experimental conditions and ESI-MS parameters is essential to achieving the softest ionization possible, ensuring reliable analysis where applicable. This study offers valuable insight through straightforward tests that can be employed to assess the suitability of an instrument for specific research needs.
Publication date
PublisherWiley
Licence
In
  • European Journal of Inorganic Chemistry 27, no. 19 (2 May 2024): 1–10.
LanguageEnglish
Peer reviewedYes
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Record identifierd5a1b424-2eb3-435f-9348-080314ed5907
Record created2024-09-11
Record modified2024-09-11
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