Studies of ion hydration by X-ray spectroscopy of liquid microjets

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Craig P. Schwartz1, Janel S. Uejio1, Walter S. Drisdell, drisdell@berkeley.edu2, Andrew M. Duffin2, Daniel Kelly, kellydn@berkeley.edu1, Christopher D. Cappa, cdcappa@ucdavis.edu3, Benjamin M. Messer4, Jared D. Smith5, and Richard J. Saykally, saykally@berkeley.edu2. (1) Department of Chemistry, University of California, Berkeley, CA 94720-1460, (2) Department of Chemistry, University of California, Berkeley; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-1460, (3) Civil & Environmental Engineering, UC Davis, Davis, CA 95616, (4) Department of Chemistry, University of Southern California, 418 SGM Building, 3620 McClintock Av, Los Angeles, CA 90089, (5) Chemical Sciences Division, LBNL
In 2000, we introduced liquid microjet technology into soft X-ray spectroscopy, thereby enabling the general study of volatile liquids by this powerful atom selective technique. We have subsequently carried out studies of the hydration environment of cations, anions, and simple biomolecules. Most recently, the formation of contact ion pairs in model biological systems and interactions of aqueous ions with polypeptides have been investigated. Recent progress will be reported.