Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 24, Pages 8248-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja1024113
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Funding
- NSF [CHE-0718790]
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The chemical origins of the Hofmeister series are investigated using infrared photodissociation (IRPD) spectroscopy. IRPD spectra of SO(4)(2-)(H(2)O)(n) with up to 80 water molecules have a band at similar to 3710 cm(-1) for n > 43 but not for n <= 43. This band corresponds to outer-shell water molecules with free OH groups similar to those at the surface of bulk water. These results indicate that the sulfate dianion has a long-range effect on water structure, and this effect is likely to be an important factor in its Hofmeister behavior.
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