Intramolecular vibrational dynamics of ν1 mode in (CF3)2C=C=O molecule induced by resonant IR femtosecond radiation

S.V. Chekalin; V.O. Kompanets; V.B. Laptev; A.A. Makarov; S.V. Pigul’sky; E.A. Ryabov; G.V. Mishakov; A.V. Sharkov; D.V. Serebryakov; I.A. Denisov; N.A. Smirnova

doi:10.1051/epjconf/201713203025

All issues

Volume 132 (2017)

EPJ Web Conf., 132 (2017) 03025

Abstract

Open Access

Issue		EPJ Web Conf. Volume 132, 2017 XXV-th Congress on Spectroscopy


Article Number		03025
Number of page(s)		2
Section		Poster talks
DOI		https://doi.org/10.1051/epjconf/201713203025
Published online		13 December 2016

EPJ Web of Conferences 132, 03025 (2017)
https://doi.org/10.1051/epjconf/201713203025

Intramolecular vibrational dynamics of ν₁ mode in (CF₃)₂C=C=O molecule induced by resonant IR femtosecond radiation

S.V. Chekalin¹, V.O. Kompanets¹, V.B. Laptev¹^*, A.A. Makarov¹, S.V. Pigul’sky¹, E.A. Ryabov¹, G.V. Mishakov², A.V. Sharkov³, D.V. Serebryakov⁴, I.A. Denisov⁵ and N.A. Smirnova⁵

¹ Institute for Spectroscopy RAS, 108840 Troitsk, Moscow, Russia
² CDP Systems Corp., 119991 Moscow, Russia
³ Lebedev Physical Institute RAS, 119991 Moscow, Russia
⁴ Institute for nuclear research RAS, 108840 Troitsk, Moscow, Russia
⁵ JSC “Giredmet”, 119017 Moscow, Russia

^* Corresponding author: laptev@isan.troitsk.ru

Published online: 13 December 2016

Abstract

Intramolecular dynamics of the vibrational levels (up to v = 5) of the ν₁ mode in (CF₃)₂CCO molecule, induced via multiphoton selective excitation of this mode by resonant femtosecond IR radiation, was studied. The times of intramolecular vibrational energy redistribution (IVR) of each vibrational level v to the remaining modes of the molecule were measured. In accordance with the theory predictions the decrease of IVR time with increasing v is observed. A sharp reduction of the IVR time (up to 1 ps) at a wavelength of 2130 cm⁻¹ of transition v=3 → v=4 was found. It was shown that with a negative chirp of a femtosecond radiation pulse the population of high-lying vibrational levels of ν₁ modes significantly increases.

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