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Dynamics of acetylene dimers hosted in helium droplets

M. Briant 1, 2 E. Mengesha 1, 2 M.-A. Gaveau 2, 1 B. Soep 1, 2 J.-M. Mestdagh 1, 2 L. Poisson 2, 1 
2 DyR - Dynamique Réactionnelle
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
Abstract : The CH antisymmetric stretch of the C2H2 moieties in acetylene dimers was explored over the range 3270–3290 cm−1 using the helium nanodroplet isolation (HENDI) technique. This work is part of a general investigation which addresses the dynamical consequences of coupling the deformation motions of weakly bound complexes with a finite size quantum liquid (the helium droplet). The acetylene dimer is attractive from this point of view because one of its deformation coordinates promotes a tunneling isomerization process. A numerical simulation of the observed spectrum allows deriving a set of effective spectroscopic constants which help understanding the dynamical role played by the droplet on the rotation and deformation of the dimer.
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Submitted on : Tuesday, February 20, 2018 - 4:33:43 PM
Last modification on : Tuesday, January 4, 2022 - 4:46:03 AM



M. Briant, E. Mengesha, M.-A. Gaveau, B. Soep, J.-M. Mestdagh, et al.. Dynamics of acetylene dimers hosted in helium droplets. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2018, 20 (4), pp.2597 - 2605. ⟨10.1039/C7CP07741F⟩. ⟨cea-01713541⟩



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