Symmetry segregation of the vibronic levels within the S1←S0 system of thiophosgene, Cl2CS, by optical-optical double resonance spectroscopy

Fujiwara, Takashige; Lim, Edward C.; Moule, David C.
April 2007
Journal of Chemical Physics;4/14/2007, Vol. 126 Issue 14, p144304
Academic Journal
The first singlet-singlet electronic system, S1←S0, in thiophosgene has been recorded as a laser induced fluorescence (LIF) excitation and an optical-optical double resonance (OODR) spectrum under jet-cooled conditions. In the OODR process, the sum of the frequencies of the pump and probe lasers must be fixed to the energy difference between a pair of vibronic levels in the S2(v′) and S0(v″) states. Detection is through the fluorescence from the S2 state. The blocking of a spectrum into its four possible symmetry components is obtained by adjusting the total pump+probe energy such that it matches the energy difference between symmetry selected levels in the S2 and S0 electronic states. In this method the pump laser is used to excite a group of “hot” sequence bands that involve combinations of the ν4 and ν6 antisymmetric vibrations. The additional data that were collected by this method were used to update and refine the analyses of the spectrum. Magnetic dipole transitions are reported for the first time.


Related Articles

  • Jet spectroscopy of buckybowl: Electronic and vibrational structures in the S0 and S1 states of triphenylene and sumanene. Kunishige, Sachi; Kawabata, Megumi; Baba, Masaaki; Yamanaka, Takaya; Morita, Yuki; Higashibayashi, Shuhei; Sakurai, Hidehiro // Journal of Chemical Physics;Jul2013, Vol. 139 Issue 4, p044313 

    Sumanene is a typical buckybowl molecule with C3v symmetry. We observed a fluorescence excitation spectrum and a dispersed fluorescence spectrum of sumanene in a supersonic jet. Bowl effects were clarified by comparing the spectra with those of triphenylene (D3h symmetry), which is a planar...

  • Intra–inter polyad mixing and breaking of symmetric–antisymmetric selection rule in the vibrational spectra of CS2 molecule. Pique, J. P.; Manners, J.; Sitja, G.; Joyeux, M. // Journal of Chemical Physics;5/1/1992, Vol. 96 Issue 9, p6495 

    A laser system composed of tunable lasers pumped by a copper vapor laser (Oxford Lasers Cu60) is described in this paper. The high resolution obtained with this system has allowed excitation of selective rotational levels of the 15 V and 10 V vibrational bands of the V 1B2 excited electronic...

  • Anomalous complex shift of low-frequency out-of-plane vibrations in aniline-M van der Waals complexes (M=He, Ne, Ar). Coutant, Bruno; Brechignac, Philippe // Journal of Chemical Physics;5/15/1994, Vol. 100 Issue 10, p7087 

    Fluorescence excitation vibronic spectra of aniline-M (M=He, Ne, Ar) van der Waals (vdW) complexes have been measured in the spectral region from 300 to 500 cm-1 above S1-S0 origin. Anomalous behavior of the vdW shifts are observed for two out-of-plane vibrational modes. The resulting vdW...

  • Fermi-type resonance in quasi-linear fluorescence excitation spectra of triazatetrabenzoporphine. Shkirman, S. F.; Solovyov, K. N. // Journal of Applied Spectroscopy;Nov2008, Vol. 75 Issue 6, p798 

    The effect of deuteration of the central NH groups on the quasi-linear fluorescence and fluorescence excitation (with selective monitoring) spectra for triazatetrabenzoporphine, a close analog of phthalocyanine, has been investigated at 77K in n-nonane. Vibrational analysis of the spectra was...

  • Vibrational distribution of CH3 produced by the reaction of O(1D2) atom with CH4. Suzuki, Toshinori; Hirota, Eizi // Journal of Chemical Physics;2/1/1993, Vol. 98 Issue 3, p2387 

    The nascent vibrational distribution of CH3 produced by the reaction O(1D2)+CH4→OH+CH3 (ΔH0=-182 kJ mol-1) has been investigated by infrared diode laser kinetic spectroscopy. The reaction was initiated by the generation of O(1D2) atoms by excimer laser photolysis of N2O or O3 at a...

  • CO2 laser assisted vibrational overtone spectroscopy. Settle, R. D. F.; Rizzo, T. R. // Journal of Chemical Physics;8/15/1992, Vol. 97 Issue 4, p2823 

    We report the implementation of a new spectroscopic scheme for measuring vibrational overtone spectra of molecules in collisionless environments. This approach is based upon selective infrared multiphoton dissociation (IRMPD) of molecules that have undergone a light atom stretch vibrational...

  • Vibrational state mixing of individual rotational levels in 1-butyne near 3333 cm-1. de Souza, A. M.; Kaur, Devinder; Perry, David S. // Journal of Chemical Physics;4/15/1988, Vol. 88 Issue 8, p4569 

    The high resolution infrared spectrum of jet-cooled 1-butyne is reported for the acetylenic C–H stretch. The absorbance of an F-center laser beam is enhanced by a multiple reflection cell surrounding the free jet. Although the spectrum in the gas phase (300 K) is a featureless rotational...

  • Complexation in two-component chlortetracycline-melanin solutions. Lapina, V.; Pershukevich, P.; Dontsov, A.; Bel’kov, M. // Journal of Applied Spectroscopy;Jan2008, Vol. 75 Issue 1, p53 

    The spectra and kinetics of fluorescence of two-component solutions of the chlortetracycline (CHTC)-DOPA-melanin (melanin or ME) system in water have been investigated. The data obtained have been compared to similar data for solutions of CHTC-melanosome from bull eye (MB), which contains...

  • Rate-equation modeling of single- and multiple-quantum vibrational energy transfer of OH (A [sup 2] Σ[sup +] , v[sup ′] =0 to 3). Rahmann, U.; Kreutner, W.; Kohse-Höinghaus, K. // Applied Physics B: Lasers & Optics;1999, Vol. 69 Issue 1, p61 

    Abstract. A computer code based on a kinetic rate-equation model for describing the collisional dynamics of OH (A[sup 2] SIGMA[sup +]) in laser-induced fluorescence experiments was developed. In this work, the capabilities of the simulation code are extended to include the vibrational states up...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics