title: Nature of anion-templated π(+)-π(+) interactions.
abstract: Interaction between positively charged aromatic groups (π(+)-π(+)) is characterized by anti-parallel, displaced-stacked structures in the presence of counteranions. Binding energies of pyridinium, N-methylpyridinium and N-methylimidazolium dimers are much larger than that of benzene-pyridine (π-π) and pyridinium-benzene (π(+)-π). Stabilization is attributed to attractive electrostatic interaction with significant dispersion contribution.
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea.
authors.forename: Inacrist
authors.initials: I
authors.lastname: Geronimo
authors.forename: N
authors.initials: N
authors.lastname: Jiten Singh
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim