Ultraviolet photodissociation dynamics of methyl iodide at 333 nm

D. Howard Failbrother; K. A. Briggman; Eric Weitz; P. C. Stair

doi:10.1063/1.467495

Ultraviolet photodissociation dynamics of methyl iodide at 333 nm

D. Howard Failbrother^*, K. A. Briggman, Eric Weitz, P. C. Stair

^*Corresponding author for this work

Chemistry

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

44 Scopus citations

Abstract

The ultraviolet (UV) photodissociation dynamics of methyl iodide at 333.45 nm has been studied using resonantly enhanced multiphoton ionization in conjunction with a time-of-flight mass spectrometer (REMPI-TOFMS). At this wavelength methyl iodide photolysis involves a transition with significant parallel and perpendicular character. Both ground (I) and spin-orbit (I*) excited iodine result from a parallel transition to the ³Q ₀ state. In contrast, the perpendicular transition, which most likely involves initial excitation to the ³ Q ₁ state, leads exclusively to production of I. Based on data from this study, an upper limit for the conical intersection between the ³Q₀ and ¹Q₁ potential surfaces is ∼30 500 cm^-1.

Original language	English (US)
Pages (from-to)	3787-3791
Number of pages	5
Journal	The Journal of Chemical Physics
Volume	101
Issue number	5
DOIs	https://doi.org/10.1063/1.467495
State	Published - 1994

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Ultraviolet photodissociation dynamics of methyl iodide at 333 nm",

abstract = "The ultraviolet (UV) photodissociation dynamics of methyl iodide at 333.45 nm has been studied using resonantly enhanced multiphoton ionization in conjunction with a time-of-flight mass spectrometer (REMPI-TOFMS). At this wavelength methyl iodide photolysis involves a transition with significant parallel and perpendicular character. Both ground (I) and spin-orbit (I*) excited iodine result from a parallel transition to the 3Q 0 state. In contrast, the perpendicular transition, which most likely involves initial excitation to the 3 Q 1 state, leads exclusively to production of I. Based on data from this study, an upper limit for the conical intersection between the 3Q0 and 1Q1 potential surfaces is ∼30 500 cm-1.",

author = "{Howard Failbrother}, D. and Briggman, {K. A.} and Eric Weitz and Stair, {P. C.}",

year = "1994",

doi = "10.1063/1.467495",

language = "English (US)",

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pages = "3787--3791",

journal = "The Journal of Chemical Physics",

issn = "0021-9606",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Ultraviolet photodissociation dynamics of methyl iodide at 333 nm

AU - Howard Failbrother, D.

AU - Briggman, K. A.

AU - Weitz, Eric

AU - Stair, P. C.

PY - 1994

Y1 - 1994

N2 - The ultraviolet (UV) photodissociation dynamics of methyl iodide at 333.45 nm has been studied using resonantly enhanced multiphoton ionization in conjunction with a time-of-flight mass spectrometer (REMPI-TOFMS). At this wavelength methyl iodide photolysis involves a transition with significant parallel and perpendicular character. Both ground (I) and spin-orbit (I*) excited iodine result from a parallel transition to the 3Q 0 state. In contrast, the perpendicular transition, which most likely involves initial excitation to the 3 Q 1 state, leads exclusively to production of I. Based on data from this study, an upper limit for the conical intersection between the 3Q0 and 1Q1 potential surfaces is ∼30 500 cm-1.

AB - The ultraviolet (UV) photodissociation dynamics of methyl iodide at 333.45 nm has been studied using resonantly enhanced multiphoton ionization in conjunction with a time-of-flight mass spectrometer (REMPI-TOFMS). At this wavelength methyl iodide photolysis involves a transition with significant parallel and perpendicular character. Both ground (I) and spin-orbit (I*) excited iodine result from a parallel transition to the 3Q 0 state. In contrast, the perpendicular transition, which most likely involves initial excitation to the 3 Q 1 state, leads exclusively to production of I. Based on data from this study, an upper limit for the conical intersection between the 3Q0 and 1Q1 potential surfaces is ∼30 500 cm-1.

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DO - 10.1063/1.467495

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EP - 3791

JO - The Journal of Chemical Physics

JF - The Journal of Chemical Physics

IS - 5

ER -

Ultraviolet photodissociation dynamics of methyl iodide at 333 nm

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