Time-resolved diode laser spectroscopy of the v6 band of propargyl produced by the UV photolysis of allene

Keiichi Tanaka, Takeshi Harada, Kouichi Sakaguchi, Kensuke Harada, Takehiko Tanaka

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The propargyl radical (CH2C≡CH) produced by the ArF excimer laser photolysis of allene was observed by time-resolved infrared diode laser spectroscopy. More than one hundred and fifty absorption lines have been assigned to the v6 (CH2-wagging) fundamental band of propargyl. Most of the absorption lines were observed as doublets due to the spin-rotation interaction in the 2B1 ground electronic state. The rotational and spin-rotation interaction constants derived for the ground vibrational state are, A0 = 9.608 47(36), B0 = 0.317 674(24), C0 = 0.307 098(24), ∈aa = -0.017 58(95), and ∈bb = -0.000 355(76) cm-1, where the figures in parentheses are 2.5 times standard deviations to be attached to the last digit. The v6 band origin is 687.176 03(62) cm-1, consistent with the infrared spectrum observed in the argon matrix. Anomalously large vibrational changes in the A rotational constant and the ΔK centrifugal distortion constant are accounted for by the a-type Coriolis interaction between the v6 and v10 states, where v10 is the CH2-rocking vibration.

Original languageEnglish
Pages (from-to)6450-6458
Number of pages9
JournalThe Journal of Chemical Physics
Volume103
Issue number15
DOIs
Publication statusPublished - Jan 1 1995

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Laser spectroscopy
Photolysis
laser spectroscopy
photolysis
Semiconductor lasers
diodes
Infrared radiation
Argon
Electronic states
Excimer lasers
digits
interactions
vibrational states
excimer lasers
standard deviation
infrared spectra
argon
vibration
matrices
electronics

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Time-resolved diode laser spectroscopy of the v6 band of propargyl produced by the UV photolysis of allene. / Tanaka, Keiichi; Harada, Takeshi; Sakaguchi, Kouichi; Harada, Kensuke; Tanaka, Takehiko.

In: The Journal of Chemical Physics, Vol. 103, No. 15, 01.01.1995, p. 6450-6458.

Research output: Contribution to journalArticle

Tanaka, Keiichi ; Harada, Takeshi ; Sakaguchi, Kouichi ; Harada, Kensuke ; Tanaka, Takehiko. / Time-resolved diode laser spectroscopy of the v6 band of propargyl produced by the UV photolysis of allene. In: The Journal of Chemical Physics. 1995 ; Vol. 103, No. 15. pp. 6450-6458.
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