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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 9389-9393 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The vibrational band shapes and their parameters of the C–H vibration of CH2I2 diluted with liquid CCl4 were measured as a function of composition. The linewidth increases from 8.7 cm−1 with decreasing mole fraction X of CH2I2 reaches a maximum value of 15.92 cm−1 near X=0.4 and decreases again in the limit of the diluted case. The frequency of the band center increases with decreasing X from 2965.37 to 2984.75 cm−1. These results are compared with the model of Knapp and Fischer for the concentration dependence of the vibrational linewidths and shifts. For the line shift, good agreement is found between theory and experiment by introducing a microscopic mole fraction. The model can be used to get an estimation on the difference between macroscopic and microscopic concentration. The predictions for the band shape are rather satisfactory in the whole concentration range. Deviations are due to the assumption that the band shapes in the model are Lorentzian for both neat liquids, whereas the experimental line shape in neat CH2I2 is not.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 1173-1180 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We propose a stochastic model which describes vibrational broadening of Raman lines in binary mixtures. The line broadening by a dynamic environment is included by considering two-particle exchange processes in the nearest neighbor shell of the reference molecule. Different environment states influence the vibration of the reference molecule. A finite interaction time between the molecules leads to finite correlation times in the vibrational relaxation. As a result the symmetric band shapes in the neat liquids deviate from Lorentzian profiles. Experimentally this is observed for the symmetric C–H stretching vibration in neat CH2I2. The model represents an extension of the model proposed by Knapp and Fischer, which reproduces Lorentzian shapes in the neat liquids. A quantitative comparison of both models with experimental data for the C–H stretching vibration in CH2I2/CCl4 mixtures is performed at several mole fractions. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 253 (1975), S. 333-333 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 77 (1965), S. 1081-1081 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 11 (1981), S. 112-115 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman spectra of the degenerate bands of cyclohexane and cyclohexane-d12 have been recorded at medium resolution in the gas phase. The computer simulation of the band contours has allowed to determine the Coriolis coupling constants ζ19, ζ20, ζ21, ζ22, ζ23, and ζ24.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 12 (1982), S. 82-85 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Reorientational correlation functions have been obtained from the analysis of the totally symmetric vibrations ν4, ν5 and ν2 of liquid cyclohexane. For the interpretation of the data, the Kubo line shape theory was assumed to be valid. The most reliable results were obtained from the ν4 vibration and indicated that reorientational relaxation occurs close to the Debye limit of rotational diffusion. The data are compared with NMR results given in the literature. The effects of rotational-vibrational coupling are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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