Multiphoton geometrical isomerization of ClFC=CFCl. Selective purification of thetrans isomer

Coronado, Eduardo A.; Ferrero, Juan C.

doi:10.1007/bf02842106

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References 4 publications

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“…Previous studies performed with a mixture of cis-and trans-ClFCdCFCl showed that the cis isomer could be selectively excited to yield trans-ClFCdCFCl with a low reaction probability (10 -2 ), even at relatively high energy fluences (5 J cm -2 ). 17 Since the present experiments were performed at a lower fluence (1 J cm -2 ) and with a mixture of both isomers diluted in Ar, the IRF lost profile could be considered free of any chemical process.…”

Section: Resultsmentioning

confidence: 99%

Collisional Relaxation of Highly Vibrationally Excitedcis-ClFCCFCl Prepared by Multiphoton Excitation

Coronado

Ferrero

1997

J. Phys. Chem. A

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Highly vibrationally excited gas-phase cis-ClFCdCFCl was prepared with a pulsed, high-powered pulsed TEA CO 2 laser operating at 948 cm -1 , and the subsequent collisional relaxation was followed by infrared fluorescence from the ν 2 mode (1168 cm -1 ). Energy transfer data were obtained for Ar and ClFCdCFCl molecules as collisional partners. The exponential decay of the average energy together with the linear microcanonical dependence of I(E) on 〈E〉 in a wide energy range allowed for the determination of the dependence of bulk average energy transfer per collision, 〈〈∆E〉〉, on the average energy, 〈〈E〉〉. In both cases, 〈〈∆E〉〉 is found to be a linear function of 〈〈E〉〉. As the energy decay profiles are exponential, they are independent of the shape of the initial distribution and of the fraction of molecules excited, allowing one to obtain the dependence of the microscopic first moment of P(E′,E), 〈∆E〉, on 〈E〉. The following dependences of 〈∆E〉 on 〈E〉 were found:〈∆E〉 P ) 4.5 ( 1.0 -(7.3 ( 1.5) × 10 -3 〈E〉 cm -1 for self-relaxation and 〈∆E〉 M ) 0.63 ( 0.06 -(1.0 ( 0.1) × 10 -3 〈E〉 cm -1 for the relaxation with Ar.

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Section: Resultsmentioning

confidence: 99%

Collisional Relaxation of Highly Vibrationally Excitedcis-ClFCCFCl Prepared by Multiphoton Excitation

Coronado

Ferrero

1997

J. Phys. Chem. A

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Multiphoton geometrical isomerization of ClFC=CFCl. Selective purification of thetrans isomer

Abstract: A selective purification of the trans isomer of CFCI=CFCI was accomplished by multiphoton induced isomerization. The effect of pressure and fluence on the isomerization yield was also investigated.

Cited by 1 publication

References 4 publications

Collisional Relaxation of Highly Vibrationally Excitedcis-ClFCCFCl Prepared by Multiphoton Excitation

Collisional Relaxation of Highly Vibrationally Excitedcis-ClFCCFCl Prepared by Multiphoton Excitation

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