Ion Mobility Measurements of Multianionic Metalloporphyrin Dimers: Structural Changes Induced by Countercation ExchangeClick to copy article linkArticle link copied!
- Erik SchneiderErik SchneiderInstitute of Physical Chemistry, Karlsruhe Institute of Technology, 76131, Karlsruhe, GermanyMore by Erik Schneider
- Katrina BrendleKatrina BrendleInstitute of Physical Chemistry, Karlsruhe Institute of Technology, 76131, Karlsruhe, GermanyMore by Katrina Brendle
- Patrick JägerPatrick JägerInstitute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, GermanyMore by Patrick Jäger
- Patrick WeisPatrick WeisInstitute of Physical Chemistry, Karlsruhe Institute of Technology, 76131, Karlsruhe, GermanyMore by Patrick Weis
- Manfred M. KappesManfred M. KappesInstitute of Physical Chemistry, Karlsruhe Institute of Technology, 76131, Karlsruhe, GermanyInstitute of Nanotechnology, Karlsruhe Institute of Technology, 76021, Karlsruhe, GermanyMore by Manfred M. Kappes
Abstract

We present gas-phase structures of dimers of MnIII and FeIII meso-tetra(4-sulfonatophenyl)porphyrin multianions with various amounts of sodium and hydrogen counterions. The structural assignments are achieved by combining mass spectrometry, ion mobility measurements, quantum chemical calculations, and trajectory method collision cross section calculations. For a common charge state, we observe significant topological variations in the dimer structures of [(MTPPS)2+nX](6-n)- (M=MnIII, FeIII; X=H, Na; n = 1–3) induced by replacing hydrogen counterions by sodium. For sodium, the dimer structures are much more compact, a finding that can be rationalized by the stronger interactions of the sodium cations with the anionic sulfonic acid groups of the porphyrins as compared to hydrogen.
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This article is cited by 7 publications.
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