Photodissociation dynamics of vibrationally excited CH2Cl 2 molecules

Ran Marom; Amir Golan; Salman Rosenwaks; Ilana Bar

doi:10.1016/j.cplett.2003.07.012

Photodissociation dynamics of vibrationally excited CH₂Cl ₂ molecules

Ran Marom, Amir Golan, Salman Rosenwaks, Ilana Bar

Department of Physics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Photodissociation of dichloromethane excited to the second C-H stretch overtone was performed by ∼235 nm photons that also tagged the Cl ²P_3/2 [Cl] and spin-orbit excited Cl ²P _1/2 [Cl*] photofragments via resonantly enhanced multiphoton ionization. The measured time-of-flight profiles together with the determined Cl*/Cl branching ratio suggest fast dissociation and involvement of several upper states of different symmetries mixing via curve crossing to release both Cl and Cl*. The determined ratio is higher than that obtained previously in the direct, almost isoenergetic, photodissociation of CH₂Cl₂ implying higher non-adiabaticity for vibrationally excited than for vibrationless ground state molecules.

Original language	English
Pages (from-to)	305-312
Number of pages	8
Journal	Chemical Physics Letters
Volume	378
Issue number	3-4
DOIs	https://doi.org/10.1016/j.cplett.2003.07.012
State	Published - 5 Sep 2003

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2003.07.012

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@article{f93e96ef0a5742e7b614c57fc1344f6c,

title = "Photodissociation dynamics of vibrationally excited CH2Cl 2 molecules",

abstract = "Photodissociation of dichloromethane excited to the second C-H stretch overtone was performed by ∼235 nm photons that also tagged the Cl 2P3/2 [Cl] and spin-orbit excited Cl 2P 1/2 [Cl*] photofragments via resonantly enhanced multiphoton ionization. The measured time-of-flight profiles together with the determined Cl*/Cl branching ratio suggest fast dissociation and involvement of several upper states of different symmetries mixing via curve crossing to release both Cl and Cl*. The determined ratio is higher than that obtained previously in the direct, almost isoenergetic, photodissociation of CH2Cl2 implying higher non-adiabaticity for vibrationally excited than for vibrationless ground state molecules.",

author = "Ran Marom and Amir Golan and Salman Rosenwaks and Ilana Bar",

year = "2003",

month = sep,

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doi = "10.1016/j.cplett.2003.07.012",

language = "English",

volume = "378",

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journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Photodissociation dynamics of vibrationally excited CH2Cl 2 molecules

AU - Marom, Ran

AU - Golan, Amir

AU - Rosenwaks, Salman

AU - Bar, Ilana

PY - 2003/9/5

Y1 - 2003/9/5

N2 - Photodissociation of dichloromethane excited to the second C-H stretch overtone was performed by ∼235 nm photons that also tagged the Cl 2P3/2 [Cl] and spin-orbit excited Cl 2P 1/2 [Cl*] photofragments via resonantly enhanced multiphoton ionization. The measured time-of-flight profiles together with the determined Cl*/Cl branching ratio suggest fast dissociation and involvement of several upper states of different symmetries mixing via curve crossing to release both Cl and Cl*. The determined ratio is higher than that obtained previously in the direct, almost isoenergetic, photodissociation of CH2Cl2 implying higher non-adiabaticity for vibrationally excited than for vibrationless ground state molecules.

AB - Photodissociation of dichloromethane excited to the second C-H stretch overtone was performed by ∼235 nm photons that also tagged the Cl 2P3/2 [Cl] and spin-orbit excited Cl 2P 1/2 [Cl*] photofragments via resonantly enhanced multiphoton ionization. The measured time-of-flight profiles together with the determined Cl*/Cl branching ratio suggest fast dissociation and involvement of several upper states of different symmetries mixing via curve crossing to release both Cl and Cl*. The determined ratio is higher than that obtained previously in the direct, almost isoenergetic, photodissociation of CH2Cl2 implying higher non-adiabaticity for vibrationally excited than for vibrationless ground state molecules.

UR - http://www.scopus.com/inward/record.url?scp=0141563360&partnerID=8YFLogxK

U2 - 10.1016/j.cplett.2003.07.012

DO - 10.1016/j.cplett.2003.07.012

M3 - Article

AN - SCOPUS:0141563360

SN - 0009-2614

VL - 378

SP - 305

EP - 312

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -

Photodissociation dynamics of vibrationally excited CH₂Cl ₂ molecules

Abstract

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