X-ray absorption spectroscopy of liquid methanol microjets: bulk electronic structure and hydrogen bonding network |
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| Authors: | Wilson Kevin R Cavalleri Matteo Rude Bruce S Schaller R D Catalano T Nilsson A Saykally R J Pettersson L G M |
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| Affiliation: | Department of Chemistry, University of California, Berkeley, California 94720, FYSIKUM, Stockholm University, AlbaNova University Center, S-10691 Stockholm, Sweden. |
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| 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. |
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