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How ions arrange in solution: detailed insight from NMR spectroscopy of paramagnetic ion pairs

Abstract Ion pairing between the paramagnetic anion [Tb(obPc)2]? (obPc=2,3,9,10,16,17,23,24-octabutoxyphthalocyaninato), which has a very large magnetic anisotropy, with various diamagnetic counterions [P(Ph)4]+ (1?a), [As(Ph)4]+ (1?b), bis(triphenylphosphine)iminium ([PPN]+, 1?c) and tetra-n-butyla...

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Hauptverfasser: Damjanović, Marko (VerfasserIn) , Morita, Takaumi (VerfasserIn) , Horii, Yoji (VerfasserIn) , Katoh, Keiichi (VerfasserIn) , Yamashita, Masahiro (VerfasserIn) , Enders, Markus (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 1 September 2016
In: ChemPhysChem
Year: 2016, Jahrgang: 17, Heft: 21, Pages: 3423-3429
ISSN:1439-7641
DOI:10.1002/cphc.201600804
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/cphc.201600804
Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/cphc.201600804
Volltext
Verfasserangaben:Marko Damjanović, Takaumi Morita, Yoji Horii, Keiichi Katoh, Masahiro Yamashita, Markus Enders
Beschreibung
Zusammenfassung:Abstract Ion pairing between the paramagnetic anion [Tb(obPc)2]? (obPc=2,3,9,10,16,17,23,24-octabutoxyphthalocyaninato), which has a very large magnetic anisotropy, with various diamagnetic counterions [P(Ph)4]+ (1?a), [As(Ph)4]+ (1?b), bis(triphenylphosphine)iminium ([PPN]+, 1?c) and tetra-n-butylammonium ([TBA]+, 1?d) was studied by means of 1H, 13C, 14N, and 31P?NMR spectroscopy in solution at various temperatures. The influence of the paramagnetic anion on the NMR spectroscopy properties of the diamagnetic cations allowed a detailed insight into the distances and relative orientations of the paired ions. Isotropic tumbling models for the description of the quaternary cations are inaccurate, particularly for [TBA]+ with its flexible butyl chains. The effects of temperature and concentration were also assessed. The advantage of this technique is that relatively large distances and the orientation between molecules or ions in solution can be studied.
Beschreibung:Gesehen am 06.05.2020
Beschreibung:Online Resource
ISSN:1439-7641
DOI:10.1002/cphc.201600804

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