Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile.

Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile. Research Abstract Details 

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Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile. Abstract Text:

Jason Hofstein,Haifeng Xu,Trevor Sears,Philip Johnson,

Pump-probe delayed ionization studies on phenylacetylene and benzonitrile in a supersonic beam reveal the production of a low-ionization-potential ( approximately 5.7 eV) species lasting more than hundreds of microseconds after excitation to the S1 state. Excitation of the molecules was done with a frequency-doubled, Fourier transform-limited, pulse-amplified cw laser, and the rotationally resolved structure of the S1-S0 transition ensures that the excited molecules are monomers. Excited-state photoelectron spectroscopy shows that the long-lived species are formed during the light pulse but not by transfer from the fluorescing S1 population after the pulse, even though the S1 spectral signature is present in the long-lived action spectrum. This behavior differs greatly from that found in benzene and with most commonly held pictures of radiationless transitions in large molecules.

Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile. Publishing Authors By Initials

J Hofstein,H Xu,T Sears,P Johnson,

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Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The journal of physical chemistry. A

VOLUME: 112

Page Numbers: 1195-201

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ISSN: 1089-5639

DAY: 19

MONTH: 01

YEAR: 2008

Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Fate of excited States in jet-cooled aromatic molecules: bifurcating pathways and very long lived species from the s(1) excitation of phenylacetylene and benzonitrile.

AFFILIATION: Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, Department of Chemistry and Biochemistry, Siena College, Loudonville, New York 12211, and Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973.

Country: United States

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MEDLINETA: J Phys Chem A

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