title: X-ray absorption spectroscopy of liquid methanol microjets: bulk electronic structure and hydrogen bonding network.
abstract: We have measured the X-ray absorption (XA) spectrum of liquid (298 K) methanol at the oxygen and carbon K edges. The 4a(1) orbital at the O K edge exhibits a pronounced sensitivity to the formation of intermolecular hydrogen bonds, with significant differences observed between the vapor and bulk spectra, whereas the C K edge reveals only subtle corresponding spectral changes. Comparison with DFT computed spectra of model methanol clusters indicates that the bulk liquid comprises long chains (n > 6) and rings of hydrogen-bonded monomers.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, FYSIKUM, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden.
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Wilson
authors.forename: Matteo
authors.initials: M
authors.lastname: Cavalleri
authors.forename: Bruce S
authors.initials: BS
authors.lastname: Rude
authors.forename: R D
authors.initials: RD
authors.lastname: Schaller
authors.forename: T
authors.initials: T
authors.lastname: Catalano
authors.forename: A
authors.initials: A
authors.lastname: Nilsson
authors.forename: R J
authors.initials: RJ
authors.lastname: Saykally
authors.forename: L G M
authors.initials: LG
authors.lastname: Pettersson