FT-IR studies of optically pumped C3 in rare gas matrices. The vibrational and electronic absorption spectrum of the ã 3Πu state

Alice M. Smith; Jürgen Agreiter; Cornelia Engel; Vladimir E. Bondybey

doi:10.1016/0009-2614(93)89043-H

FT-IR studies of optically pumped C₃ in rare gas matrices. The vibrational and electronic absorption spectrum of the ã ³Π_u state

Alice M. Smith
, Jürgen Agreiter
, Cornelia Engel
, Vladimir E. Bondybey

Chair of Physical Chemistry

Technical University of Munich

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

14 Scopus citations

Abstract

Through a double-resonance technique, the FT-IR absorptions of the lowest-lying triplet state of C₃ have been observed in argon and neon matrices. The long-lived ã ³Π_u state is populated by an intersystem crossing from the excited Ã ¹Π_u state. The difference spectra obtained with and without C₃Ã ¹Π_u laser excitation exhibit a large depletion of the electronic ground state and a simultaneous appearance of the vibrational and electornic ã ³Π_u absorption spectra. The b̃ ³Π_g←ã ³Π_u spectrum extends from ≈6500-8400 cm^-1 and shows an extensive vibrational structure. The assignments of the two stretching vibrations of the ã ³Π_u state are verified through a harmonic force field fit to nine isotopic frequencies.

Original language	English
Pages (from-to)	531-539
Number of pages	9
Journal	Chemical Physics Letters
Volume	207
Issue number	4-6
DOIs	https://doi.org/10.1016/0009-2614(93)89043-H
State	Published - 28 May 1993

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@article{0ba4f381f3a640d6affca77e62234855,

title = "FT-IR studies of optically pumped C3 in rare gas matrices. The vibrational and electronic absorption spectrum of the {\~a} 3Πu state",

abstract = "Through a double-resonance technique, the FT-IR absorptions of the lowest-lying triplet state of C3 have been observed in argon and neon matrices. The long-lived {\~a} 3Πu state is populated by an intersystem crossing from the excited {\~A} 1Πu state. The difference spectra obtained with and without C3{\~A} 1Πu laser excitation exhibit a large depletion of the electronic ground state and a simultaneous appearance of the vibrational and electornic {\~a} 3Πu absorption spectra. The {\~b} 3Πg←{\~a} 3Πu spectrum extends from ≈6500-8400 cm-1 and shows an extensive vibrational structure. The assignments of the two stretching vibrations of the {\~a} 3Πu state are verified through a harmonic force field fit to nine isotopic frequencies.",

author = "Smith, \{Alice M.\} and J{\"u}rgen Agreiter and Cornelia Engel and Bondybey, \{Vladimir E.\}",

note = "Funding Information: and H13CN and Anton Thoma for assistance in the measurements. Research support from the Deutsche Forschungsgemeinschaft and the Fonds der Chem-ischen Industrie is also gratefuIly acknowledged.",

year = "1993",

month = may,

day = "28",

doi = "10.1016/0009-2614(93)89043-H",

language = "English",

volume = "207",

pages = "531--539",

journal = "Chemical Physics Letters",

issn = "0009-2614",

publisher = "Elsevier B.V.",

number = "4-6",

}

TY - JOUR

T1 - FT-IR studies of optically pumped C3 in rare gas matrices. The vibrational and electronic absorption spectrum of the ã 3Πu state

AU - Smith, Alice M.

AU - Agreiter, Jürgen

AU - Engel, Cornelia

AU - Bondybey, Vladimir E.

N1 - Funding Information: and H13CN and Anton Thoma for assistance in the measurements. Research support from the Deutsche Forschungsgemeinschaft and the Fonds der Chem-ischen Industrie is also gratefuIly acknowledged.

PY - 1993/5/28

Y1 - 1993/5/28

N2 - Through a double-resonance technique, the FT-IR absorptions of the lowest-lying triplet state of C3 have been observed in argon and neon matrices. The long-lived ã 3Πu state is populated by an intersystem crossing from the excited Ã 1Πu state. The difference spectra obtained with and without C3Ã 1Πu laser excitation exhibit a large depletion of the electronic ground state and a simultaneous appearance of the vibrational and electornic ã 3Πu absorption spectra. The b̃ 3Πg←ã 3Πu spectrum extends from ≈6500-8400 cm-1 and shows an extensive vibrational structure. The assignments of the two stretching vibrations of the ã 3Πu state are verified through a harmonic force field fit to nine isotopic frequencies.

AB - Through a double-resonance technique, the FT-IR absorptions of the lowest-lying triplet state of C3 have been observed in argon and neon matrices. The long-lived ã 3Πu state is populated by an intersystem crossing from the excited Ã 1Πu state. The difference spectra obtained with and without C3Ã 1Πu laser excitation exhibit a large depletion of the electronic ground state and a simultaneous appearance of the vibrational and electornic ã 3Πu absorption spectra. The b̃ 3Πg←ã 3Πu spectrum extends from ≈6500-8400 cm-1 and shows an extensive vibrational structure. The assignments of the two stretching vibrations of the ã 3Πu state are verified through a harmonic force field fit to nine isotopic frequencies.

UR - https://www.scopus.com/pages/publications/0000247756

U2 - 10.1016/0009-2614(93)89043-H

DO - 10.1016/0009-2614(93)89043-H

M3 - Article

AN - SCOPUS:0000247756

SN - 0009-2614

VL - 207

SP - 531

EP - 539

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

FT-IR studies of optically pumped C₃ in rare gas matrices. The vibrational and electronic absorption spectrum of the ã ³Π_u state

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