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  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure and luminescence of 2,7-dimethylnaphthalene-1-carbonitrile (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 961-965 
    Details
    ISSN: 1572-8854
    Keywords: fluorescence ; dimethylnaphthalene ; impurities ; phosphorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The title compound crystallizes in the monoclinic space group P2 1/c: M r = 181.2; a = 7.119(1), b = 18.389(4), c = 7.5385(6) Å β = 91.661(7)° V = 986.4(5) Å3; and Z = 4. The purified material shows fluorescence similar to other naphthalene derivatives: monomer fluorescence (λmax 350-370 nm) in the solid state and in dilute solutions, and excimer fluorescence (λmax 421 nm) in concentrated solutions. Intense blue-green luminescence (λmax 490 nm) is observed in some partially purified crystalline samples. This is attributed to phosphorescence from two isomeric bromodimethylnaphthalenecarbonitrile impurities detected by GC-MS analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009590431639
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zwitterionic and neutral binuclear complexes formed from copper(II) hexafluoroacetylacetonate and an amino alcohol (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 901-906 
    Details
    ISSN: 1572-8854
    Keywords: hfac ; copper dimers ; coordination geometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Reaction of anhydrous Cu(hfac)2 (hfacH = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione) with 2-(diisopropylamino)ethanol yields two different binuclear copper(II) complexes. Compound 1, [Cu(hfac)2(μ-OCH2CH2NH(i-Pr)2)]2, Cu2C36H42O10N2F24, consists of centrosymmetric dimers containing two cis-Cu(hfac)2 moieties that are bridged by two zwitterionic 2-(diisopropylammonio)ethoxide ions. Cell parameters are a = 11.6516(13); b = 14.0117(17); c = 15.3258(17) Å β = 105.75(9)° in space group P21/n. The copper ions exhibit tetragonally distorted octahedral coordination, with two of the Cu—O(hfac) distances showing characteristic elongation (2.2858(16) and 2.3192(17) Å). Compound 2, [Cu(hfac)((i-Pr)2NCH2CH2O)]2, Cu2C26H38O6N2F12, also contains centrosymmetric dimers; these are formed by two square-pyramidal moieties joined at their bases. Cell parameters are a = 7.7353(5); b = 13.6166(17); c = 15.683(2) Å β = 98.23(1)° in space group P21/n. In this structure the apical Cu—O(hfac) distance is elongated (2.254(4) Å), and the O atoms of the 2-(diisopropylamino)ethoxide ions are bridging.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009573928004
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Some aspects of data processing for an optical absorption experiment in a pulsed 1000-Tesla magnet (1998)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 70 (1998), S. 797-804 
    Details
    ISSN: 0020-7608
    Keywords: pulsed magnetic field ; Zeeman effect ; quadruple metal bonds ; octachlorodirhenate ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A procedure is given for the analysis of optical absorption data acquired in the hostile environment of a pulsed 1000-Tesla magnet.   © 1998 John Wiley & Sons, Inc. Int J Quant Chem 70: 797-804, 1998
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Chemical systems for exploration of high magnetic field effects (1997)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 64 (1997), S. 607-611 
    Details
    ISSN: 0020-7608
    Keywords: State inversion ; Zeeman effect ; quadruple metal bonds ; octachlorodirhenate ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A review is given of molecules that may exhibit observable structural or electronic changes at accessible pulsed magnetic fields. There is an emphasis on structural changes that modulate the ultraviolet-visible spectrum. Transition-metal dimers with quadruple bonds are recommended for testing in magnetic fields on the order of 1000 Tesla.   © 1997 John Wiley & Sons, Inc. Int J Quant Chem 64: 607-611, 1997
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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