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INFRARED DEPLETION SPECTROSCOPY OF THE ANILINE-WATER-TOLUENE CLUSTER CATION AND MODE SELECTIVE PREDISSOCIATION OF THE HYDROGEN BONDS.

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/20425

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Title: INFRARED DEPLETION SPECTROSCOPY OF THE ANILINE-WATER-TOLUENE CLUSTER CATION AND MODE SELECTIVE PREDISSOCIATION OF THE HYDROGEN BONDS.
Creators: Piracha, Naveed K.; Nakanaga, T.
Issue Date: 2002
Abstract: The vibrational spectrum of the ternary cluster cation of aniline-water-toluene in a supersonic jet has been measured by infrared depletion method in the NH and OH stretching region. Three bands were observed at 3722, 3634 and $3295cm^{-1}$. The analysis of the vibrational spectrum showed that two NH bonds of aniline interact with water and toluene in the cluster cation. The band at $3295cm^{-1}$ was assigned to the stretching vibration of NH of aniline cation interacting with toluene, whereas other two bands were assigned to the symmetric and anti-symmetric stretching vibrations of free OH of water. When the cluster absorbs the infrared photon, it dissociated into two fragments. There are two possible dissociation path of this cluster. 1) $AWT^{+} \to AW^{+} + T$ and 2) $AWT^{+} \to AT^{+} + W$ The branching ratio of this reaction $AW^{+}/AT^{+}$ was measured for three different bands, and we obtained 0.49 for the NH stretching vibration and 0.37 and 0.38 for the OH stretching vibrations. This results suggest that there is a fast energy transfer from the NH stretching vibration to the hydrogen bond between NH and toluene which enables the vibrational mode dependence of the predissociation.
URI: http://hdl.handle.net/1811/20425
Other Identifiers: 2002-MJ-09
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