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  • 1990-1994  (4)
  • 1970-1974  (1)
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    Relativistic effects in gold chemistry. 3. Gold(I) complexes (1990)
    s.l. : American Chemical Society
    Inorganic chemistry 29 (1990), S. 3593-3607 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00343a057
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Raman studies of cation-surfactant interactions in alkylpolyoxyethylene surfactant aqueous solutions (1991)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 22 (1991), S. 183-186 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman studies are reported of conformational change in an alkyl polyoxyethylene non-ionic surfactant associated with coordination to alkali and alkaline earth metal cations. This surfactant has a simpler mix of conformers (with TTT relatively unimportant) compared with non-ionic surfactants incorporating an aromatic ring in the hydrophobic head-group. This relatively simple conformational pattern facilitates the interpretation of the 868 cm-1 band assigned to a TGTTḠT (T, trans; G, gauche; Ḡ, gauche minus) for the —OCH2CH2OCH2CH2O— polyoxyethylene sequence associated with surfactant-cation complexes. Counter anions such as halides appeared to have a negligible effect on complex formation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250220308
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Raman and infrared spectra and vibrational assignments of gallium (II) sulphide (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 355-358 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman and IR active vibrations of the GaS layer lattice are observed and assigned in comparsion with the related Ga - Ga bonded structures β-GaSe and Ga2X62- (where X = Cl, Br or I).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010406
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Raman and 125Te NMR spectroscopic evidence on the solvent extraction of tellurium(IV) species from HCl solutions (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 845-847 
    Details
    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 solutions of TeCI4 in HCI up to 12 mol I-1 show a changing pattern of bands consistent with a mixture of complexes, including [TeCI6]2- and [TeCI4(OH)]-. High-field 125Te NMR spectra at 126.24 MHz of these aqueous solutions consist of a single bind, showing that the TeIV species are in rapid equilibrium, which moves upfield within the range + 1550 to + 1400 ppm as the HCI concentration is increased. Solvent extraction with diethyl ether selects a single species from TeIV—HCI solutions. This is identified as the complex acid HTeCI4(OH) by a Raman spectrum marked by νs(Te—CI) = 289 cm-1 and ν(Te—O) = 667 cm-1, and a characteristic 125Te resonance, δ = 1448 ppm, w1/2 = 80 Hz.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250251010
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Vibrational spectroscopic studies of aqueous dextran sulphate (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 25 (1994), S. 727-733 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The interaction between water and polyelectrolytes was investigated using aqueous dextran sulphate systems. The results indicated that the hydrogen-bonding network of water in the system is affected by the presence of a highly charged polyanion with both surface hydrophobic and hydrophilic sites. This is reflected in the spectral profile of the O—H stretching mode of water in the region 3000-4000 cm-1. Comparison with aqueous sodium methyl sulphate and sodium sulphate systems suggests that two regions of water are present in the dextran sulphate system. Water in the region associated with the hydrophobic carbohydrate skeleton appears to be more strongly hydrogen bonded than bulk water whereas that in the vicinity of the hydrophilic —SO3 - groups is more weakly hydrogen bonded. Variations in the vibrational spectra were dependent on the extent of the different populations of water present and can be explained by invoking the concepts of long-range intermolecular coupling. Analysis of the dextran skeletal bands in the region 750-1850 cm-1 confirmed that the —SO3 - sites play an important role in the hydration of dextran sulphate. The presence of two symmetric —SO3- stretching modes in the Raman spectra of these systems, both of which are sensitive to the hydration state of the molecule, has been explained in terms of a model based on non-equivalent —SO3 - sites.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250250737
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    Paper (German National Licenses)
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