Ion clustering in aqueous solutions probed with vibrational energy transfer

Hongtao Bian; Xiewen Wen; Jiebo Li; Hailong Chen; Suzee Han; Xiuquan Sun; Jian Song; Wei Zhuang; Junrong Zheng

doi:10.1073/pnas.1019565108

Ion clustering in aqueous solutions probed with vibrational energy transfer

Hongtao Bian
, Xiewen Wen
, Jiebo Li
, Hailong Chen
, Suzee Han
, Xiuquan Sun
, Jian Song
, Wei Zhuang
, Junrong Zheng

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

162 Citations (Scopus)

Abstract

Despite prolonged scientific efforts to unravel the hydration structures of ions in water, many open questions remain, in particular concerning the existences and structures of ion clusters in 1:1 strong electrolyte aqueous solutions. A combined ultrafast 2D IR and pump/probe study through vibrational energy transfers directly observes ion clustering in aqueous solutions of LiSCN, NaSCN, KSCN and CsSCN. In a near saturated KSCN aqueous solution (water/KSCN molar ratio = 2.4/1), 95% of the anions form ion clusters. Diluting the solution results in fewer, smaller, and tighter clusters. Cations have significant effects on cluster formation. A small cation results in smaller and fewer clusters. The vibrational energy transfer method holds promise for studying a wide variety of other fast short-range molecular interactions.

Original language	English
Pages (from-to)	4737-4742
Journal	PNAS: Proceedings of the National Academy of Sciences of the United States of America
Volume	108
Issue number	12
DOIs	https://doi.org/10.1073/pnas.1019565108
Publication status	Published - 22 Mar 2011
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Ion clustering in aqueous solutions probed with vibrational energy transfer",

abstract = "Despite prolonged scientific efforts to unravel the hydration structures of ions in water, many open questions remain, in particular concerning the existences and structures of ion clusters in 1:1 strong electrolyte aqueous solutions. A combined ultrafast 2D IR and pump/probe study through vibrational energy transfers directly observes ion clustering in aqueous solutions of LiSCN, NaSCN, KSCN and CsSCN. In a near saturated KSCN aqueous solution (water/KSCN molar ratio = 2.4/1), 95\% of the anions form ion clusters. Diluting the solution results in fewer, smaller, and tighter clusters. Cations have significant effects on cluster formation. A small cation results in smaller and fewer clusters. The vibrational energy transfer method holds promise for studying a wide variety of other fast short-range molecular interactions.",

author = "Hongtao Bian and Xiewen Wen and Jiebo Li and Hailong Chen and Suzee Han and Xiuquan Sun and Jian Song and Wei Zhuang and Junrong Zheng",

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TY - JOUR

T1 - Ion clustering in aqueous solutions probed with vibrational energy transfer

AU - Bian, Hongtao

AU - Wen, Xiewen

AU - Li, Jiebo

AU - Chen, Hailong

AU - Han, Suzee

AU - Sun, Xiuquan

AU - Song, Jian

AU - Zhuang, Wei

AU - Zheng, Junrong

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2011/3/22

Y1 - 2011/3/22

N2 - Despite prolonged scientific efforts to unravel the hydration structures of ions in water, many open questions remain, in particular concerning the existences and structures of ion clusters in 1:1 strong electrolyte aqueous solutions. A combined ultrafast 2D IR and pump/probe study through vibrational energy transfers directly observes ion clustering in aqueous solutions of LiSCN, NaSCN, KSCN and CsSCN. In a near saturated KSCN aqueous solution (water/KSCN molar ratio = 2.4/1), 95% of the anions form ion clusters. Diluting the solution results in fewer, smaller, and tighter clusters. Cations have significant effects on cluster formation. A small cation results in smaller and fewer clusters. The vibrational energy transfer method holds promise for studying a wide variety of other fast short-range molecular interactions.

AB - Despite prolonged scientific efforts to unravel the hydration structures of ions in water, many open questions remain, in particular concerning the existences and structures of ion clusters in 1:1 strong electrolyte aqueous solutions. A combined ultrafast 2D IR and pump/probe study through vibrational energy transfers directly observes ion clustering in aqueous solutions of LiSCN, NaSCN, KSCN and CsSCN. In a near saturated KSCN aqueous solution (water/KSCN molar ratio = 2.4/1), 95% of the anions form ion clusters. Diluting the solution results in fewer, smaller, and tighter clusters. Cations have significant effects on cluster formation. A small cation results in smaller and fewer clusters. The vibrational energy transfer method holds promise for studying a wide variety of other fast short-range molecular interactions.

UR - https://www.scopus.com/pages/publications/79953218396

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U2 - 10.1073/pnas.1019565108

DO - 10.1073/pnas.1019565108

M3 - RGC 21 - Publication in refereed journal

SN - 0027-8424

VL - 108

SP - 4737

EP - 4742

JO - PNAS: Proceedings of the National Academy of Sciences of the United States of America

JF - PNAS: Proceedings of the National Academy of Sciences of the United States of America

IS - 12

ER -

Ion clustering in aqueous solutions probed with vibrational energy transfer

Abstract

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