O(3P) Atoms as a Probe of Surface Ordering in 1-Alkyl-3-methylimidazolium-Based Ionic Liquids

被引：34

作者：

Waring, Carla ^{[1
]}

Bagot, Paul A. J. ^{[1
]}

Slattery, John M. ^{[2
]}

Costen, Matthew L. ^{[1
]}

McKendrick, Kenneth G. ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 01期

关键词：

INELASTIC-SCATTERING DYNAMICS; SELF-ASSEMBLED MONOLAYERS; HYDROCARBON SURFACE; HYPERTHERMAL REACTIONS; MOLECULAR-DYNAMICS; ENERGY-TRANSFER; OXYGEN-ATOMS; INTERFACE; SQUALANE; SPECTROSCOPY;

D O I：

10.1021/jz900247y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the reactivity of photolytically generated ground-state, gas-phase atomic oxygen O(P-3) with the surfaces of two related ionic liquids, 1-ethyl-3-methylimidazolium ([emim]) bis(trifluoromethyl-sulfonyl)imide ([NTf2]) and 1-dodecyl-3-methylimidazolium ([C(12)mim]) [NTf2]. The liquids differ only in the length of the alkyl side-chain on the cation. Laser-induced fluorescence was used to detect the gas-phase OH radicals formed at the gas-liquid interface. The considerable yield of OH from [C(12)mim][NTf2] in comparison to the undetectable amount from [emim][NTf2] cannot simply be explained by the difference in stoichiometry. We propose that this "chemical probe" method therefore provides strong evidence for the preferential accumulation of longer alkyl chains at the gas liquid interface.

引用

页码：429 / 433

页数：5

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