Vibrational Dynamics of Aniline (Ar)1 and Aniline (CH4)1 Clusters
COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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The first excited electronic state S1 vibrational dynamics of anilineAr1 and anilineCH41 van der Waals vdW clusters have been studied using molecular jet and time resolved emission spectroscopic techniques. The rates of intramolecular vibrational energy redistribution IVR and vibrational predissociation VP as a function of excess vibrational energy are reported for both clusters. For vibrational energy in excess of the cluster binding energy, both clusters are observed to dissociate. The dispersed emission spectra of these clusters demonstrate that anilineAr1 dissociates to all energetically accessible bare molecule states and that anilineCH41 dissociates selectively to only the bare molecule vibrationless state. The emission kinetics show that in the anilineAR1 case, the initially excited states have nanosecond lifetimes, and intermediate cluster states have very short lifetimes. In contrast, the initially excited anilineCH41 states and other vibrationally excited cluster states are very short lived 100 ps, and the intermediate cluster zeroth order state is observed.
- Organic Chemistry
- Physical Chemistry