Structure and dynamics of trimethylacetonitrile at the silica/vapor, silica/liquid, and liquid/vapor interfaces

Feng Ding; Christopher A. Rivera; Qin Zhong; Katherine Manfred; Xiaoxiao He; Michael R. Brindza; Robert A. Walker; John T. Fourkas

doi:10.1021/jp2121615

Structure and dynamics of trimethylacetonitrile at the silica/vapor, silica/liquid, and liquid/vapor interfaces

Feng Ding, Christopher A. Rivera, Qin Zhong, Katherine Manfred, Xiaoxiao He, Michael R. Brindza, Robert A. Walker^*, John T. Fourkas

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	7000-7009
Number of pages	10
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	12
DOIs	https://doi.org/10.1021/jp2121615
Publication status	Published - 29 Mar 2012

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title = "Structure and dynamics of trimethylacetonitrile at the silica/vapor, silica/liquid, and liquid/vapor interfaces",

abstract = "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.",

author = "Feng Ding and Rivera, {Christopher A.} and Qin Zhong and Katherine Manfred and Xiaoxiao He and Brindza, {Michael R.} and Walker, {Robert A.} and Fourkas, {John T.}",

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T1 - Structure and dynamics of trimethylacetonitrile at the silica/vapor, silica/liquid, and liquid/vapor interfaces

AU - Ding, Feng

AU - Rivera, Christopher A.

AU - Zhong, Qin

AU - Manfred, Katherine

AU - He, Xiaoxiao

AU - Brindza, Michael R.

AU - Walker, Robert A.

AU - Fourkas, John T.

PY - 2012/3/29

Y1 - 2012/3/29

N2 - 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.

AB - 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.

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Structure and dynamics of trimethylacetonitrile at the silica/vapor, silica/liquid, and liquid/vapor interfaces

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