Large amplitude motion within acetylene–rare gas complexes hosted in helium droplets

Abstract

Near-infrared spectroscopy of the C2H2–Ar, Kr complexes was performed in the spectral region overlapping the ν3/ν2 + ν4 + ν5 Fermi-type resonance of C2H2. The HElium NanoDroplet Isolation (HENDI) technique was used for this purpose.

Reaction dynamics within a cluster environment

“…As the slow rotations that have just been reviewed, the hindered rotations in molecular complexes are likely perturbed by the nonsuperfluid component of the complex. With collaborators, we have explored this issue both experimentally and theoretically by considering C 2 H 2 -Ne, Ar and Kr complexes, 187,188 . The (C 2 H 2 ) 2 dimer has been studied also.…”

“…A numerical model was developed for this purpose in Ref. 188. It generalizes the concept of effective rotational constants and offers a phenomenological approach to the dynamical effect of the helium droplets on the large amplitude deformation, i.e.…”

“…The adjusted parameters B, D, µ, G LD and G UD were discussed in Ref. 188. Two effects sensitively affect the observed spectra: the rigidity of the C 2 H 2 • • • Rare gas complex and the coupling dynamics between the complex and the non-superfluid and superfluid components of the nanodroplet.…”

“…The Coupling dynamics between the complex, the non-superfluid and the superfluid components of the nanodroplet -Information about this coupling is brought by the fit parameters B, D and µ as ex-tensively discussed in Ref. 188. Only the information brought by parameter B is recalled here.…”

“…With collaborators, we have explored this issue both experimentally and theoretically by considering C 2 H 2 -Ne, Ar and Kr complexes. 187,188 The (C 2 H 2 ) 2 dimer has also been studied. 189 The experimental work in ref.…”