### Abstract

The CO_{2} laser Stark spectroscopy was applied to the ν_{4} (SiF_{3} degenerate stretch) fundamental band of SiDF_{3}. It was found that electric field-dependent interactions of the (Δl, ΔK) = (2, -1) type, caused by the vibrationally induced dipole moment, give remarkable perturbations in the ν_{4} vibrational state. Several perturbation-induced rovibrational transitions obeying the Δ(K - l) = ± 3 selection rules were observed in the Stark spectrum, and the C_{0} rotational constant, which is otherwise hard to obtain for a symmetric-top molecule, was determined to be 4133.55(19) MHz. The vibrationally induced dipole moment μ_{r} and the ordinary (2, -1) interaction constant r_{4} derived from the analysis are ±0.03516(13) D and ±1.896(52) MHz, respectively, the ± signs indicating that μ_{r} and r_{4} have the same sign. The band origin, the Coriolis constant Cζ_{4}, and the vibration-rotation constant α_{4}^{C} are 994.302604(16) cm^{-1}, 2210.26(20) MHz, and 10.070(25) MHz, respectively. The dipole moment is 1.35719(17) D in the ground state, and increases by 0.02649(10) D on excitation of the ν_{4} vibration. The uncertainties given in the parentheses correspond to three standard deviations. A theoretical treatment is presented on the relation between the vibrationally induced dipole moment μ_{r} and the vibrational change δμ_{4} of the dipole moment.

Original language | English |
---|---|

Pages (from-to) | 230-245 |

Number of pages | 16 |

Journal | Journal of Molecular Spectroscopy |

Volume | 138 |

Issue number | 1 |

DOIs | |

Publication status | Published - Jan 1 1989 |

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### All Science Journal Classification (ASJC) codes

- Atomic and Molecular Physics, and Optics
- Spectroscopy
- Physical and Theoretical Chemistry

### Cite this

_{2}laser Stark spectroscopy of the ν

_{4}band of SiDF

_{3}: The C

_{0}rotational constant and vibrationally induced dipole moment.

*Journal of Molecular Spectroscopy*,

*138*(1), 230-245. https://doi.org/10.1016/0022-2852(89)90113-6

**CO _{2} laser Stark spectroscopy of the ν_{4} band of SiDF_{3} : The C_{0} rotational constant and vibrationally induced dipole moment.** / Harada, Kensuke; Nagano, Ichirou; Kimura, Susumu; Tanaka, Keiichi; Tanaka, Takehiko.

Research output: Contribution to journal › Article

_{2}laser Stark spectroscopy of the ν

_{4}band of SiDF

_{3}: The C

_{0}rotational constant and vibrationally induced dipole moment',

*Journal of Molecular Spectroscopy*, vol. 138, no. 1, pp. 230-245. https://doi.org/10.1016/0022-2852(89)90113-6

_{2}laser Stark spectroscopy of the ν

_{4}band of SiDF

_{3}: The C

_{0}rotational constant and vibrationally induced dipole moment. Journal of Molecular Spectroscopy. 1989 Jan 1;138(1):230-245. https://doi.org/10.1016/0022-2852(89)90113-6

}

TY - JOUR

T1 - CO2 laser Stark spectroscopy of the ν4 band of SiDF3

T2 - The C0 rotational constant and vibrationally induced dipole moment

AU - Harada, Kensuke

AU - Nagano, Ichirou

AU - Kimura, Susumu

AU - Tanaka, Keiichi

AU - Tanaka, Takehiko

PY - 1989/1/1

Y1 - 1989/1/1

N2 - The CO2 laser Stark spectroscopy was applied to the ν4 (SiF3 degenerate stretch) fundamental band of SiDF3. It was found that electric field-dependent interactions of the (Δl, ΔK) = (2, -1) type, caused by the vibrationally induced dipole moment, give remarkable perturbations in the ν4 vibrational state. Several perturbation-induced rovibrational transitions obeying the Δ(K - l) = ± 3 selection rules were observed in the Stark spectrum, and the C0 rotational constant, which is otherwise hard to obtain for a symmetric-top molecule, was determined to be 4133.55(19) MHz. The vibrationally induced dipole moment μr and the ordinary (2, -1) interaction constant r4 derived from the analysis are ±0.03516(13) D and ±1.896(52) MHz, respectively, the ± signs indicating that μr and r4 have the same sign. The band origin, the Coriolis constant Cζ4, and the vibration-rotation constant α4C are 994.302604(16) cm-1, 2210.26(20) MHz, and 10.070(25) MHz, respectively. The dipole moment is 1.35719(17) D in the ground state, and increases by 0.02649(10) D on excitation of the ν4 vibration. The uncertainties given in the parentheses correspond to three standard deviations. A theoretical treatment is presented on the relation between the vibrationally induced dipole moment μr and the vibrational change δμ4 of the dipole moment.

AB - The CO2 laser Stark spectroscopy was applied to the ν4 (SiF3 degenerate stretch) fundamental band of SiDF3. It was found that electric field-dependent interactions of the (Δl, ΔK) = (2, -1) type, caused by the vibrationally induced dipole moment, give remarkable perturbations in the ν4 vibrational state. Several perturbation-induced rovibrational transitions obeying the Δ(K - l) = ± 3 selection rules were observed in the Stark spectrum, and the C0 rotational constant, which is otherwise hard to obtain for a symmetric-top molecule, was determined to be 4133.55(19) MHz. The vibrationally induced dipole moment μr and the ordinary (2, -1) interaction constant r4 derived from the analysis are ±0.03516(13) D and ±1.896(52) MHz, respectively, the ± signs indicating that μr and r4 have the same sign. The band origin, the Coriolis constant Cζ4, and the vibration-rotation constant α4C are 994.302604(16) cm-1, 2210.26(20) MHz, and 10.070(25) MHz, respectively. The dipole moment is 1.35719(17) D in the ground state, and increases by 0.02649(10) D on excitation of the ν4 vibration. The uncertainties given in the parentheses correspond to three standard deviations. A theoretical treatment is presented on the relation between the vibrationally induced dipole moment μr and the vibrational change δμ4 of the dipole moment.

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UR - http://www.scopus.com/inward/citedby.url?scp=0346322372&partnerID=8YFLogxK

U2 - 10.1016/0022-2852(89)90113-6

DO - 10.1016/0022-2852(89)90113-6

M3 - Article

AN - SCOPUS:0346322372

VL - 138

SP - 230

EP - 245

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

SN - 0022-2852

IS - 1

ER -