Structure and Dynamics of Trimethylacetonitrile at the Silica/Vapor, Silica/Liquid, and Liquid/Vapor Interfaces

被引：4

作者：

Ding, Feng ^{[1
]}

Rivera, Christopher A. ^{[1
]}

Zhong, Qin ^{[1
]}

Manfred, Katherine ^{[1
]}

He, XiaoXiao ^{[1
]}

Brindza, Michael R. ^{[1
]}

Walker, Robert A. ^{[1
,2
,6
]}

Fourkas, John T. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[2] Univ Maryland, Chem Phys Program, College Pk, MD 20742 USA

[3] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA

[4] Univ Maryland, Maryland NanoCtr, College Pk, MD 20742 USA

[5] Univ Maryland, Ctr Nanophys & Adv Mat, College Pk, MD 20742 USA

[6] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59715 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 12期

基金：

美国国家科学基金会;

关键词：

FREQUENCY GENERATION SPECTROSCOPY; VIBRATIONAL SPECTROSCOPY; ORIENTATIONAL DYNAMICS; SURFACE; LIQUIDS; MOLECULES; PROPIONITRILE; SPECTRA;

D O I：

10.1021/jp2121615

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：

Optical spectroscopy has been used to probe the interfacial organization and dynamics of trimethylacetonitrile (TMACN). Molecular orientation at the silica/liquid, silica/vapor and liquid/vapor interfaces of TMACN has been studied using vibrational sum-frequency generation (VSFG) spectroscopy. These studies reveal that TMACN exhibits appreciable organization at each of these interfaces, despite the bulky nature of its tert-butyl group. VSFG spectra measured from the silica/liquid interface suggest that TMACN does not form the sort of well-organized bilayer that has been observed previously for acetonitrile and propionitrile. Optical Kerr effect studies of TMACN confined in porous silica glasses demonstrate that this, liquid forms a dynamically inhibited surface layer that is roughly one molecule thick, which is consistent with the organizational model suggested by the VSFG data.

引用

页码：7000 / 7009

页数：10

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