title: Communication: Nonadditive dielectric susceptibility spectra of associating liquids.
abstract: Highly unusual linear-response spectra involving contributions from hydrogen-bonded supramolecular processes and from structural relaxations are found in 4-methyl-3-heptanol mixed with 2-ethyl-1-hexylbromide. Although the mean time scales of the underlying relaxations are separated by more than 3 decades, the overall spectra cannot be decomposed into a sum of these processes. This finding challenges the ubiquitous practice of disentangling susceptibility spectra of Debye liquids by adding suitable subspectra. The spectral shape of the studied viscous mixtures is excellently described using the Williams ansatz, here a necessary approach and not as previously considered merely an alternative to additive analyses.
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: S P
authors.initials: SP
authors.lastname: Bierwirth
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: P
authors.identifier: 0000000298495560
authors.initials: P
authors.lastname: Münzner
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: T A
authors.initials: TA
authors.lastname: Knapp
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Gainaru
authors.affiliation: Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Böhmer