Vibrational Dissociation Dynamics of the Methane Clusters of 3-Amino-s-Tetrazine
Nikko P. Quevada
Department of Chemistry, De La Salle University-Manila
Taft Avenue, Manila, Philippines
corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
The dissociation dynamics of van der Waals clusters formed from 3-amino-s-tetrazine (AT) and methane (CH4) in a supersonic molecular beam shows that the rate of bond breaking of the AT-CH4 van der Waals bond is determined largely by the cluster density of states. Unlike in the case of argon clusters of AT, which were initially investigated by Alfano et al., the nature of initially excited AT vibrational ring mode does not appear to play a major role in the dissociation dynamics of AT-CH4 cluster. The difference in vibrational predissociation rates between AT-Ar (2 x 106 s-1) and AT-CH4 (> 2 x 1010 s-1) mirrors the expected increase in cluster density of states that occurs when argon replaces methane as AT’s complexing partner. AT-CH4 is estimated to have a ground-state binding energy of < 270 cm-1.
INTRODUCTION
Physical chemists have long been very interested in investigating the possibility of achieving some degree of control over the outcome of chemical reactions by selectively exciting specific vibrational motions of molecules. For this reason, many types of van der Waals clusters, binary clusters in particular, have been extensively studied (Alfano et al. 1989; Alfano et al 1992; Brumbaugh et al. 1983; Dimopoulou-Rademann et al. 1988; Heppener et al. 1985; Ramaekers et al. 1983; Smalley et al. 1978; Weber et al 1988). Typically, binary clusters . . . . .
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