title: Tetrahydrofuran clathrate hydrate formation.
abstract: We report on the formation of tetrahydrofuran clathrate hydrate studied by x-ray Raman scattering measurements at the oxygen K edge. A comparison of x-ray Raman spectra measured from water-tetrahydrofuran mixtures and tetrahydrofuran hydrate at different temperatures supports stochastic hydrate formation models rather than models assuming hydrate precursors. This is confirmed by molecular dynamics simulations and density functional theory calculations of x-ray Raman spectra. In addition, changes in the spectra of tetrahydrofuran hydrate with temperatures close to the hydrate's dissociation temperature were observed and may be connected to changes in hydrate's local structure due to the formation of hydrogen bonds between guest and water molecules.
authors.affiliation: Fakultät Physik/DELTA, Technische Universität Dortmund, D-44221 Dortmund, Germany.
authors.forename: Heiko
authors.initials: H
authors.lastname: Conrad
authors.forename: Felix
authors.initials: F
authors.lastname: Lehmkühler
authors.forename: Christian
authors.initials: C
authors.lastname: Sternemann
authors.forename: Arto
authors.initials: A
authors.lastname: Sakko
authors.forename: Dietmar
authors.initials: D
authors.lastname: Paschek
authors.forename: Laura
authors.initials: L
authors.lastname: Simonelli
authors.forename: Simo
authors.initials: S
authors.lastname: Huotari
authors.forename: Omid
authors.initials: O
authors.lastname: Feroughi
authors.forename: Metin
authors.initials: M
authors.lastname: Tolan
authors.forename: Keijo
authors.initials: K
authors.lastname: Hämäläinen