The Fourier spectrum of CH3OH: The region between 8 and 40 cm−1

Moruzzi, G.; Strumia, F.; Bonetti, Cosimo; Carli, B.; Mencaraglia, F.; Carlotti, M.; Lonardo, G. Di; Trombetti, A.

doi:10.1016/0022-2852(84)90101-2

Cited by 28 publications

(1 citation statement)

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“…From 50 to 100 ps, the peak alignment amplitude decreases for methanol while it barely changes for the equivalent rigid molecule. This can be understood remembering that in methanol an accurate picture of the rotation-torsion energies [46,47] can be obtained using a rotational constant B(Γ, K, v t ) for each torsional level. Since, as emphasized by Eq.…”

Section: Zzmentioning

confidence: 99%

Torsional control of the methyl group in methanol

et al. 2019

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Experimental and theoretical investigations of the field-free alignment of the non-rigid methanol molecule are reported. The molecule is subject to a 140 TW/cm 2 intensity laser pulse with a 100 fs duration. The experimental signal displays a constant permanent alignment and a fast decaying transient alignment consistent with a prolate-like molecule with (B + C)/2 on the order of 0.808 cm −1. The theoretical model takes into account the large amplitude internal rotation of the methyl group with respect to the hydroxyl group. In the case of a continuous wave laser field, a rotational alignment close to that of a rigid molecule is predicted. Torsional alignment also occurs even though there is no explicit dependence of the polarizability tensor on the angle of internal rotation. In the case of a strong short laser pulse, the theoretical approach shows that permanent and transient rotational alignment take place. The latter displays an exponential-like decay due to the high density of rotation-torsion levels. Torsional alignment also occurs and depends on the temperature. The theoretical model allows us to reproduce the experimental signal provided one component of the polarizability tensor is adjusted and dissipation effects due to molecular collisions are taken into account.

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Section: Zzmentioning

confidence: 99%