title: Long-range ion-water and ion-ion interactions in aqueous solutions.
abstract: Using small-angle X-ray scattering (SAXS), we obtained direct experimental evidence on the structure of hydrated polyatomic anions, with hydration effects starkly different from those of cations (J. Chem. Phys., 2011, 134, 064513). We propose that the size and charge density of the naked ions do not sufficiently account for the differences in the SAXS curves. For cations, the ion-ion contribution gives a prominent first-order diffraction peak, whereas for anions, the low-Q enhancement in the SAXS curves indicates density inhomogeneities as a result of ion-water interactions.
authors: Department of Chemistry, Stanford University, Stanford, California 94305, USA.
authors: Chen
authors: C
authors: Chen
authors: Congcong
authors: C
authors: Huang
authors: Iradwikanari
authors: I
authors: Waluyo
authors: Thomas
authors: T
authors: Weiss
authors: Lars G M
authors: LG
authors: Pettersson
authors: Anders
authors: A
authors: Nilsson
mesh_terms: D007477:Ions / Q000737:chemistry*; D010472:Perchlorates / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D053838:Scattering, Small Angle; D017670:Sodium Compounds / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D010472:Perchlorates; D010710:Phosphates; D017670:Sodium Compounds; D012996:Solutions; D013431:Sulfates; D014867:Water; C012036:sodium sulfate; C031068:sodium perchlorate; C018279:sodium phosphate
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