Vibrationally excited populations from IR-multiphoton absorption. 3. Energy transfer between 1,1,2-trifluoroethane and argon

Zellweger, Jean Michel; Brown, Thomas J.; Barker, John R.

doi:10.1021/j100275a022

Cited by 27 publications

(12 citation statements)

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“…Infrared fluorescence was used by Barker and co-workers to measure the energy transfer of hot molecules [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In these experiments, the decay of hot molecule's internal energy due to collisional energy transfer to the bath molecules was monitored by infrared fluorescence emitted from hot molecules as a function of time.…”

Section: Experiments Under Bulk Conditionsmentioning

confidence: 99%

Energy transfer of highly vibrationally excited molecules studied by crossed molecular beam/time-sliced velocity map ion imaging

Hsu

Tsai

Dyakov

et al. 2012

International Reviews in Physical Chemistry

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Energy transfer of highly vibrationally excited molecules has been studied extensively under bulk conditions in the past 40 years. On the other hand, in 1973 Fisk and co-workers reported the first experimental results of collisional energy transfer of highly vibrationally excited KBr using cross-molecular beams. Surprisingly, it is the only crossed molecular beam experiment about the energy transfer of highly vibrationally excited molecules. No other similar crossed molecular beam experiments have been reported in the following four decades. Recently we have studied the energy transfer of highly vibrationally excited molecules using crossed molecular beams/time-of-flight mass spectrometer in combination with time-sliced velocity map ion imaging techniques. Energy transfer probability density functions were accurately obtained and details of energy transfer mechanisms were evidenced from the cross-molecular beam scatterings. This paper reviews our recent work of energy transfer of highly vibrationally excited molecules. The effects of long-lived complex, initial translational energy, initial rotational temperature, vibrational motions, alkylation, attractive potential and electronic state on the energy transfer and supercollisions were discussed, and comparisons to theoretical calculations and experiments conducted under bulk conditions were made.

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Section: Experiments Under Bulk Conditionsmentioning

confidence: 99%

Energy transfer of highly vibrationally excited molecules studied by crossed molecular beam/time-sliced velocity map ion imaging

Hsu

Tsai

Dyakov

et al. 2012

International Reviews in Physical Chemistry

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“…Various workers have either calculated this distribution [3][4][5][6] or it has been inferred using experimental techniques such as Raman spectroscopy. 31,32 Problems arise as the distribution can be bimodal, resulting from a near thermal population of those molecules that did not absorb, and a higher energy distribution of molecules that absorbed many photons.…”

Section: A Irmpa-irf Experimentsmentioning

confidence: 99%

“…[2][3][4][5][6][7][8][9] In contrast with studies utilizing UV pumping followed by IC, IRMPA remains a poor cousin. This arises because there is uncertainty in the initial energy distribution associated with the IRMPA process.…”

Section: Introductionmentioning

confidence: 99%

“…This arises because there is uncertainty in the initial energy distribution associated with the IRMPA process. [3][4][5][6] Nevertheless, it has been shown theoretically that under appropriate conditions the results extracted from the data depend solely on the average excitation energy, i.e., they are independent of the initial distribution. 10,11 The average internal energy the excited molecule initially reaches after IRMPA is controlled by varying the fluence of the excitation laser.…”

Section: Introductionmentioning

confidence: 99%

“…IC following visible/UV excitation has generally been used with cyclic ring systems, usually aromatics, because these molecules possess the required photophysical properties. In contrast, molecules studied using IRMPA are halogenated hydrocarbons, for example 1,1,2-trifluoroethane, 6 cis-ClFCϭCFCl ͑Ref. 9͒ and CDCl 3 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A direct comparison of vibrational deactivation of hexafluorobenzene excited by infrared multiple photon absorption and internal conversion

Gascooke

Alwahabi

King

et al. 1998

The Journal of Chemical Physics

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We report the first direct comparison between energy transfer parameters measured using infrared multiphoton absorption ͑IRMPA͒ versus ultraviolet ͑UV͒ excitation followed by rapid internal conversion ͑IC͒. Highly excited hexafluorobenzene ͑HFB͒ molecules in the electronic ground state were prepared by ͑i͒ IRMPA by CO 2 laser pumping to an average initial energy of 14 500-17 500 cm Ϫ1 and ͑ii͒ UV excitation to ϳ40 300 cm Ϫ1 followed by IC. The vibrational deactivation of the highly excited HFB by the monatomic collider gas argon was monitored by time-resolved infrared fluorescence. The results for the two methods are identical within experimental error, demonstrating the viability of IRMPA as a method of state preparation for vibrational deactivation experiments involving large molecules.

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High‐temperature collisional energy transfer in highly vibrationally excited molecules II: Isotope effects in isopropyl bromide systems

Brown

King

Gilbert

1987

Int J of Chemical Kinetics

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Vibrationally excited populations from IR-multiphoton absorption. 3. Energy transfer between 1,1,2-trifluoroethane and argon

Cited by 27 publications

References 0 publications

Energy transfer of highly vibrationally excited molecules studied by crossed molecular beam/time-sliced velocity map ion imaging

Energy transfer of highly vibrationally excited molecules studied by crossed molecular beam/time-sliced velocity map ion imaging

A direct comparison of vibrational deactivation of hexafluorobenzene excited by infrared multiple photon absorption and internal conversion

High‐temperature collisional energy transfer in highly vibrationally excited molecules II: Isotope effects in isopropyl bromide systems

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