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  • 1
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 24 (1993), S. 371-376 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra were measured for [N(CD3)4]2ZnCl4 over the pressure range 1-2000 bar. The influence of pressure was studied for the ZnCl4 bending modes and the 24 cm-1 phonon peak. The pressure dependence of these modes was interpreted having regard to the phase transitions predicted by the temperature-pressure diagram. The pressure dependence of all the recorded spectra highlights a critical behaviour at about 500 bar which does not correspond to any phase transition in the diagram. This phenomenon was interpreted by consideration of the modulation characteristics.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 13 (1982), S. 270-275 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The temperature dependence of Raman active modes in monocrystalline Triethylenediamine has been studied by Raman spectroscopy. The linewidths and frequencies of these modes have been measured in the temperature range 110-330 K (that is the low temperature phase for which T 〈 Tc = 351 K). A strong broadening is observed at higher temperatures in this range for the A2 and E1g librons. This can be related to the activation of disorder in the low temperature phase.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 16 (1985), S. 79-89 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of some bands in the plastic phase of hexamethylethane have been recorded as a function of temperature. Interesting features related to the molecular reorientations and librations have been derived from the band shape analysis of F2g and Eg low-frequency spectra. A novel temperature dependence of the libration width has been observed. The analysis of the internal modes' bandwidths at ν1 = 878 cm-1 and ν2 = 475 cm-1 provides consistent results for the monomolecular reorientational dynamics.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 20 (1989), S. 517-521 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The temperature dependence of the Raman scattering from a single crystal of acetanilide (ACN-H) and fully deuterated acetanilide (ACN-D) in the low-frequency (phonon) and C=O stretching regions was studied. The observed normal behaviour of the frequency shift of the C=O stretching modes in ACN-D, raises questions concerning several theoretical models previously proposed to explain the peculiar behaviour with temperature of the A1g stretching modes observed in ACN-H. The forms of the low-frequency Raman spectra for ACN-H and ACN-D are very similar, except in the frequency range 70-120 cm-1, where an additional mode (denoted D′) is seen in the Raman spectrum of ACN-D. A strong temperature dependence of the frequency of this band is observed. The origin of this mode is still undecided.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 14 (1983), S. 93-95 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The behaviour of some lattice modes in the Raman spectra (wavenumber shift range 0-50 cm-1) has been investigated for (N(CD3)4)2 ZnCl4 and (N(CH3)4)2 ZnCl4 over the temperature range 183-523 K.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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