Picosecond dynamics of the S2 excited state of azulene and its van der Waals complexes with Ar and Xe

Osama K. Abou-Zied; David R.M. Demmer; Stephen C. Wallace; Ronald P. Steer

doi:10.1016/S0009-2614(96)01507-2

Picosecond dynamics of the S₂ excited state of azulene and its van der Waals complexes with Ar and Xe

Osama K. Abou-Zied^*, David R.M. Demmer, Stephen C. Wallace, Ronald P. Steer

^*Corresponding author for this work

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

13 Citations (Scopus)

Abstract

The dynamics of the second excited singlet (S₂) states of jet-cooled azulene (Az) and its van der Waals complexes with one and two atoms of Ar and Xe have been investigated. Quantum interference effects due to restricted intramolecular vibrational redistribution in azulene have been reinterpreted. Lifetime shortening in the 1:1 and 1:2 complexes with Xe is attributed to an enhancement of the rate of S₂-T₁ intersystem crossing by the external heavy atom effect. Excitation of the complexes to states with E_vib > E_b produces energy-resolved fluorescence decays which exhibit sequential intramolecular vibrational redistribution-vibrational predissociation.

Original language	English
Pages (from-to)	75-85
Number of pages	11
Journal	Chemical Physics Letters
Volume	266
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(96)01507-2
Publication status	Published - Feb 21 1997
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/S0009-2614(96)01507-2

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title = "Picosecond dynamics of the S2 excited state of azulene and its van der Waals complexes with Ar and Xe",

abstract = "The dynamics of the second excited singlet (S2) states of jet-cooled azulene (Az) and its van der Waals complexes with one and two atoms of Ar and Xe have been investigated. Quantum interference effects due to restricted intramolecular vibrational redistribution in azulene have been reinterpreted. Lifetime shortening in the 1:1 and 1:2 complexes with Xe is attributed to an enhancement of the rate of S2-T1 intersystem crossing by the external heavy atom effect. Excitation of the complexes to states with Evib > Eb produces energy-resolved fluorescence decays which exhibit sequential intramolecular vibrational redistribution-vibrational predissociation.",

author = "Abou-Zied, {Osama K.} and Demmer, {David R.M.} and Wallace, {Stephen C.} and Steer, {Ronald P.}",

note = "Funding Information: The authors are grateful to the Natural Sciences and Engineering Research Council of Canada and the Centers of Excellence for Molecular and Interfacial Dynamics for supporting this work. OA-Z and RPS are grateful to SCW for making time-resolved fluorescence equipment in his laboratories available to us. We are also grateful to the referee of an earlier paper (Ref. \[13\])f or useful comments on the spectroscopy of azulene.",

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doi = "10.1016/S0009-2614(96)01507-2",

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AU - Abou-Zied, Osama K.

AU - Demmer, David R.M.

AU - Wallace, Stephen C.

AU - Steer, Ronald P.

N1 - Funding Information: The authors are grateful to the Natural Sciences and Engineering Research Council of Canada and the Centers of Excellence for Molecular and Interfacial Dynamics for supporting this work. OA-Z and RPS are grateful to SCW for making time-resolved fluorescence equipment in his laboratories available to us. We are also grateful to the referee of an earlier paper (Ref. \[13\])f or useful comments on the spectroscopy of azulene.

PY - 1997/2/21

Y1 - 1997/2/21

N2 - The dynamics of the second excited singlet (S2) states of jet-cooled azulene (Az) and its van der Waals complexes with one and two atoms of Ar and Xe have been investigated. Quantum interference effects due to restricted intramolecular vibrational redistribution in azulene have been reinterpreted. Lifetime shortening in the 1:1 and 1:2 complexes with Xe is attributed to an enhancement of the rate of S2-T1 intersystem crossing by the external heavy atom effect. Excitation of the complexes to states with Evib > Eb produces energy-resolved fluorescence decays which exhibit sequential intramolecular vibrational redistribution-vibrational predissociation.

AB - The dynamics of the second excited singlet (S2) states of jet-cooled azulene (Az) and its van der Waals complexes with one and two atoms of Ar and Xe have been investigated. Quantum interference effects due to restricted intramolecular vibrational redistribution in azulene have been reinterpreted. Lifetime shortening in the 1:1 and 1:2 complexes with Xe is attributed to an enhancement of the rate of S2-T1 intersystem crossing by the external heavy atom effect. Excitation of the complexes to states with Evib > Eb produces energy-resolved fluorescence decays which exhibit sequential intramolecular vibrational redistribution-vibrational predissociation.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

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ER -

Picosecond dynamics of the S₂ excited state of azulene and its van der Waals complexes with Ar and Xe

Abstract

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