Molecular Dynamics of Methylamine Following C?H and N?H Vibrational Excitation and Promotion to the à State |
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| Authors: | Amir Golan Salman Rosenwaks Ilana Bar |
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| Affiliation: | 1. Department of Physics, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel;2. Department of Physics, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel The Helen and Sanford Diller Family Chair in Chemical Physics. |
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| Abstract: | The molecular dynamics of methylamine, CH3NH2, was investigated via vibrationally mediated photodissociation. It was found that the ∼243.1 nm photolysis of initially excited N–H and C–H fundamental stretches and combinations and overtones of methyl deformation yields H photofragments. Surprisingly, the deformations promote the H atom release more effectively, implying mode-dependent enhancement of photodissociation in a relatively large molecule with a torsional degree of freedom. The H Doppler profiles correspond to low translational energies, supporting the dominant non-adiabatic N–H dissociation channel. |
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