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Litao Shen - One of the best experts on this subject based on the ideXlab platform.

Xiaona Wang - One of the best experts on this subject based on the ideXlab platform.

Chenglin Sun - One of the best experts on this subject based on the ideXlab platform.

  • effects of fermi resonance of ν1 and 2ν2 on the raman scattering of fundamental mode ν2 from liquid Carbon Disulfide
    Materials Research Bulletin, 2017
    Co-Authors: Nan Gong, Mi Zhou, Limei Fan, Wenzhi Song, Chenglin Sun
    Abstract:

    Abstract Raman scattering from liquid Carbon Disulfide has been studied for different concentrations in benzene. Modes ν 1 (656 cm −1 ) and 2ν 2 (796 cm −1 ) are allowed bands of Carbon Disulfide, while ν 2 (396 cm −1 ) is forbidden by the selection rules. However, a weak band has been observed along with the strong allowed totally symmetrical stretching mode ν 1 . The observation is ascribed to the effects of the vibrational anharmonicity of free molecule and intermolecular interaction potential. The ν 1 and 2ν 2 Fermi resonance can be influenced by the external conditions. The effects of the ν 1 and 2ν 2 Fermi resonance on the Raman frequency and relative intensity are discussed and the Raman scattering cross section of ν 2 is studied for different concentration of Carbon Disulfide in benzene. The second-order perturbation quantum theory is introduced to explain the results that the Raman scattering of ν 2 is influenced by 2ν 2 and its Fermi resonance with ν 1 .

Chengtang Liu - One of the best experts on this subject based on the ideXlab platform.

  • photochemical production of Carbonyl sulfide Carbon Disulfide and dimethyl sulfide in a lake water
    Journal of Environmental Sciences-china, 2017
    Co-Authors: Chenglong Zhang, Junfeng Liu, Yuanyuan Zhang, Chengtang Liu
    Abstract:

    Abstract Photochemical production of Carbonyl sulfide (COS), Carbon Disulfide (CS2) and dimethyl sulfide (DMS) was intensively studied in the water from the Aohai Lake of Beijing city. The lake water was found to be highly supersaturated with COS, CS2 and DMS, with their initial concentrations of 0.91 ± 0.073 nmol/L, 0.55 ± 0.071 nmol/L and 0.37 ± 0.062 nmol/L, respectively. The evident photochemical production of COS and CS2 in the lake water under irradiation of 365 nm and 302 nm indicated that photochemical production of them might be the reason for their supersaturation. The similar dependence of wavelength and oxygen for photochemical production of COS, CS2 and DMS implied that they might be from the same precursors. The water cage effect was found to favor COS production but inhibit CS2 and DMS formation, indicating that COS photochemical production was mainly from direct degradation of the precursors and the formation of CS2 and DMS needed intermediates via combination of Carbon-centered radicals and sulfur-centered radicals. The above assumptions were further confirmed by simulation experiments with addition of Carbonyls and amino acids (cysteine and methionine), and the photochemical formation mechanisms for COS, CS2 and DMS in water were derived from the investigations.

Alan L Balch - One of the best experts on this subject based on the ideXlab platform.

  • incorporation of the similarly sized molecules diiodine and Carbon Disulfide into cocrystals formed with the fullerenes c60 or c70
    Crystal Growth & Design, 2014
    Co-Authors: Kamran B Ghiassi, Faye L Bowles, Susanne Y Chen, Marilyn M Olmstead, Alan L Balch
    Abstract:

    Cocrystallization of diiodine and Carbon Disulfide with the two common fullerenes, C60 and C70, has been examined. The binary cocrystal, C70·I2, readily formed when a solution of diiodine in diethyl ether was layered over C70 dissolved in toluene, chlorobenzene, or 1,2-dichlorobenzene, but no binary cocrystal of diiodine and C60 could be obtained despite persistent efforts. The ternary cocrystal, C70·0.85I2·0.15CS2, which was grown from a Carbon Disulfide solution of C70 and a benzene solution of diiodine, is isostructural with C70·I2 but has 15% of the diiodine sites replaced with Carbon Disulfide. In contrast, C70·0.68I2·0.32CS2, which was obtained from diffusion of a cyclohexane solution of diiodine into a Carbon Disulfide solution of C70, is a unique ternary cocrystal that is not related to any binary cocrystal of C70 with diiodine or Carbon Disulfide. Crystals of 2C60·2.46CS2·0.54I2 were obtained from a saturated Carbon Disulfide solution of diiodine and C60. Black crystals of 2C60·2.46CS2·0.54I2 for...

  • Incorporation of the Similarly Sized Molecules, Diiodine and Carbon Disulfide, into Cocrystals Formed with the Fullerenes, C60 or C70
    2014
    Co-Authors: Kamran B Ghiassi, Faye L Bowles, Susanne Y Chen, Marilyn M Olmstead, Alan L Balch
    Abstract:

    Cocrystallization of diiodine and Carbon Disulfide with the two common fullerenes, C60 and C70, has been examined. The binary cocrystal, C70·I2, readily formed when a solution of diiodine in diethyl ether was layered over C70 dissolved in toluene, chlorobenzene, or 1,2-dichlorobenzene, but no binary cocrystal of diiodine and C60 could be obtained despite persistent efforts. The ternary cocrystal, C70·0.85I2·0.15CS2, which was grown from a Carbon Disulfide solution of C70 and a benzene solution of diiodine, is isostructural with C70·I2 but has 15% of the diiodine sites replaced with Carbon Disulfide. In contrast, C70·0.68I2·0.32CS2, which was obtained from diffusion of a cyclohexane solution of diiodine into a Carbon Disulfide solution of C70, is a unique ternary cocrystal that is not related to any binary cocrystal of C70 with diiodine or Carbon Disulfide. Crystals of 2C60·2.46CS2·0.54I2 were obtained from a saturated Carbon Disulfide solution of diiodine and C60. Black crystals of 2C60·2.46CS2·0.54I2 form in a different space group from those of the solvate 2C60·3CS2 but have a very similar structure. Remarkably, diiodine molecules fractionally replace Carbon Disulfide in only two of the three independent sites within this crystal

  • Ordered Structures from Crystalline Carbon Disulfide Solvates of the Nano-Tubular Fullerenes D5h(1)‑C90 and D5h-C70
    2013
    Co-Authors: Faye L Bowles, Kamran B Ghiassi, Susanne Y Chen, Marilyn M Olmstead, Brandon Q. Mercado, Hua Yang, Ziyang Liu, Alan L Balch
    Abstract:

    The structures of three crystalline solvates, D5h(1)-C90·CS2, D5h-C70·3CS2, and 2­(D5h-C70)·3CS2, of nanotubular fullerenes have been determined by single crystal X-ray diffraction. Despite the marked tendency for fullerenes to disorder, the Carbon cages in all three structures are fully ordered at 100(2) K for D5h(1)-C90·CS2 and 90 K for the other two crystals. Moreover, the Carbon Disulfide molecules are also ordered, except for the case of D5h(1)-C90·CS2, where there is a minor disorder in the solvate location. The molecular packing in D5h(1)-C90·CS2 reflects the nanotubular nature of the fullerene component with channels of alternating fullerenes and Carbon Disulfide molecules running along the crystallographic b axis. The molecular packing arrangements for D5h-C70·3CS2 and 2­(D5h-C70)·3CS2 do not show such channels. In D5h-C70·3CS2, the Carbon Disulfide molecules form chains that snake between the fullerenes and along the crystallographic a axis. In 2­(D5h-C70)·3CS2, there are two crystallographically distinct fullerene cages, which are segregated into individual layers. Within each layer, the fullerenes show hexagonal close packing and the Carbon Disulfide molecules form chains that snake between the fullerene layers in a zigzag fashion. The presence of diiodine in solution was essential for the formation of crystals of D5h-C70·3CS2 and 2­(D5h-C70)·3CS2 that were suitable for structure determination, although no diiodine was incorporated in these crystals