Solute-free interfacial zones in polar liquids.

Solute-free interfacial zones in polar liquids.
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DOI:
10.1021/jp100200y
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发表时间:
2010-04-29
影响因子:
3.3
通讯作者:
Pollack, Gerald H.
Pollack, Gerald H.
中科院分区:
化学3区
文献类型:
--
作者:
Chai, Binghua;Pollack, Gerald H.

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最近已经描述了在水溶液中的大的无溶质界面区。在亲水性表面附近发现的这些“禁区”通常有几百微米宽,代表了比大量水更有序的水区域。我们在这里报告,其他极性溶剂,包括甲醇,乙醇,异丙醇,乙酸,D2O和二甲基亚砜(DMSO)显示类似的近表面排斥区,虽然幅度较小。微电极测量表明,这些区域带负电荷,并响应于入射红外辐射而生长,类似于水溶液中的禁区。因此,近地表禁区似乎不仅是水的特征,也是其他极性液体的特征。
Large, solute-free interfacial zones have recently been described in aqueous solutions. Found next to hydrophilic surfaces, these “exclusion zones” are commonly several hundred micrometers wide and represent regions of water that appear to be more ordered than bulk water. We report here that other polar solvents including methanol, ethanol, isopropanol, acetic acid, D2O and dimethyl sulfoxide (DMSO) show similar near-surface exclusion zones, albeit of smaller magnitude. Microelectrode measurements show that these zones are negatively charged and grow in response to incident infrared radiation, similar to exclusion zones in aqueous solutions. Hence, near-surface exclusion zones appear to be features characteristic not only of water but of other polar liquids as well.
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发表时间: 1949-01-01
影响因子: 44.1
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影响因子: 2.9
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发表时间: 2009-10-22
期刊: The journal of physical chemistry. B
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