title: Tuning cation-anion interactions in ionic liquids by changing the conformational flexibility of the cation.
abstract: Cation-anion interactions can be tuned via the degree of cation constraint. X-ray Photoelectron Spectroscopy (XPS) experiments reveal that anion-cation based interactions may be enhanced by introducing conformational restriction into the substituent chains of quaternary ammonium cations. A larger degree of charge-transfer was observed for the constrained [C8C1Pyrr](+) cation relative to the [N6,6,6,14](+) cation.
authors.affiliation: School of Chemistry, The University of Nottingham, Nottingham, NG7 2RD, UK. peter.licence@nottingham.ac.uk.
authors.forename: R K
authors.initials: RK
authors.lastname: Blundell
authors.forename: P
authors.initials: P
authors.lastname: Licence