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Spectroscopic Evidence for an Attractive Cation-Cation Interaction in Hydroxy-Functionalized Ionic Liquids: A Hydrogen-Bonded Chain-like Trimer.
Niemann, Thomas; Strate, Anne; Ludwig, Ralf; Zeng, Helen J; Menges, Fabian S; Johnson, Mark A.
Afiliación
  • Niemann T; Department of Chemistry, University of Rostock, 18059, Rostock, Germany.
  • Strate A; Department Life, Light & Matter, University of Rostock, 18051, Rostock, Germany.
  • Ludwig R; Department of Chemistry, University of Rostock, 18059, Rostock, Germany.
  • Zeng HJ; Department Life, Light & Matter, University of Rostock, 18051, Rostock, Germany.
  • Menges FS; Department of Chemistry, University of Rostock, 18059, Rostock, Germany.
  • Johnson MA; Department Life, Light & Matter, University of Rostock, 18051, Rostock, Germany.
Angew Chem Int Ed Engl ; 57(47): 15364-15368, 2018 Nov 19.
Article en En | MEDLINE | ID: mdl-30303295
We address the formation of hydrogen bonded domains among the cationic constituents of the ionic liquid (IL) 1-(3-hydroxypropyl)pyridinium tetrafluoroborate [HPPy][BF4 ] by means of cryogenic ion vibrational predissociation spectroscopy of cold (ca. 35 K) gas-phase cluster ions and quantum chemistry. Specifically, analysis of the OH stretching bands reveals a chain-like OH⋅⋅⋅OH⋅⋅⋅OH⋅⋅⋅BF4 - binding motif involving the three cations in the cationic quinary cluster ion (HPPy+ )3 (BF4 - )2 . Calculations show that this cooperative H-bond attraction compensates for the repulsive Coulomb forces and results in stable complexes that successfully compete with those in which the OH groups are predominantly attached to the counter anions. Our combined experimental and theoretical approach provides insight into the cooperative effects that lead to the formation of hydrogen bonded domains involving the cationic constituents of ILs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2018 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2018 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania