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  • 1
    Electronic Resource
    Electronic Resource
    Kinetics of photo-induced dissociation of Na clusters deposited on Mica (1993)
    Springer
    The European physical journal 28 (1993), S. 321-329 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 32.80.Wr ; 33.80.Gj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Na clusters bound to mica surfaces have been irradiated with pulsed and cw visible laser light. Kinetic energy and angular distributions of the Na atoms desorbing from the clusters have been determined using cw two-photon laser-induced fluorescence detection. In addition the dependence of the desorption rate on laser power, wavelength and polarization has been measured. The most probable kinetic energyE kin of the photodesorbed atoms at the surface temperatureT S =300 K was found to beE kin=18±5 meV, independent of laser irradiance (3 µJ/cm2...20 mJ/cm2) and wavelength (450 nm, 505 nm, 658 nm). With increasing orientation angle between detection axis and surface normal (0°≦Θ≦90°)E kin was observed to decrease slightly, while it was nearly independent of surface temperature betweenT S =30 K andT S =300 K. Also, with increasing radius of the Na clusters the desorbing Na atoms slowed down. The angular distribution of the Na atoms was of cos2-type with respect to the surface normal. These observations suggest that laser-induced desorption of Na from Na clusters bound to mica surfaces involves an initial rate-limiting step of direct surface plasmon excitation followed by a final step of delayed thermal desorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437267
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  • 2
    Electronic Resource
    Electronic Resource
    Die katalytische Hydrierung einiger Benzimidazol-Derivate (1938)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 21 (1938), S. 1692-1694 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.193802101205
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  • 3
    Electronic Resource
    Electronic Resource
    Über ein Alkaloid aus Vallesia glabra (1939)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 22 (1939), S. 547-549 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das von Stuckert und Paya bereits isolierte Alkaloid aus Vallesia glabra (Ancocherinde) wurde auf einem einfacheren Weg dargestellt. Die Base konnte so weitgehend gereinigt werden, dass die Identifizierung mit Aspidospermin aus Aspidosperma Quebracho-blanco möglich war. Der Name Vallesin ist aus der chemischen Literatur zu streichen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19390220166
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  • 4
    Electronic Resource
    Electronic Resource
    Über Allo-Pregnandiol, einen neuen Alkohol aus dem Schwangernharn (1935)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 18 (1935), S. 160-165 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19350180119
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Darstellung des Amino-isatins und einiger Derivate (1936)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 19 (1936), S. 1327-1332 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.193601901177
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  • 6
    Electronic Resource
    Electronic Resource
    Über afrikanische Pfeilgiftpflanzen. 1. Mitteilung. Adenium somalense Balf. fil. (1940)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 23 (1940), S. 548-558 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Adenium somalense Balf. fil. wurde Somalin, ein neuartiges Herzglucosid isoliert, das trotz enger chemischer Verwandtschaft mit Digitoxin pharmakologisch dem Strophanthin näher steht. Die Konstitution des Somalins wurde vollständig aufgeklärt, es besteht aus einer Molekel Digitoxigenin und einer Molekel Cymarose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19400230172
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese und Polymerisation ungesättigter Benzaldazine (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 433-438 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Polymerization of Unsaturated BenzaldazinesThe preparation of methacrylic and acrylic acid derivatives of isomeric hydroxybenzaldazines and their characterization by u.v.-, i.r.-, 1H and 13C n.m.r. spectroscopy are described. By radical polymerization and copolymerisation with styrene and methyl methacrylate, respectively, crosslinked polymers showing ultraviolet-absorbing properties are obtained.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290308
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  • 8
    Electronic Resource
    Electronic Resource
    Polymerisation von Vinylverbindungen in Gegenwart von Titan(III)-chlorid (1980)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 963-970 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polymerization of Vinyl Compounds in the Presence of Titanium(III)ChlorideThe polymerization of styrene, acrylonitrile and some methacrylates initiated by a titanium(III) chloride dichloroacetic acid redox system was studied. The monomer selectivity of the polymerization in the presence of titanium(III) chloride was found to be affected by a reductive termination reaction. Titanium(III) chloride acts as a retarder in the polymerization of styrene initiated by azobisisobutyronitrile (AIBN). The polymerization of polar monomers like acrylonitrile, methyl, ethyl and propyl methacrylate by AIBN is inhibited by titanium(III) chloride.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19803220613
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  • 9
    Electronic Resource
    Electronic Resource
    Vinylpolymerisation mit reduzierenden Übergangsmetallverbindungen. VII. Polymerisation von Methylmethacrylat in Gegenwart von Molybdän(III)-chlorid-Sulfoxid-Systemen (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 595-603 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vinyl Polymerization Initiated by Reducing Compounds of Transition Metals. VII. Polymerization of Methyl Methacrylate in the Presence of Molybdenum(III) Chloride/Sulfoxide SystemsThe polymerization of methyl methacrylate initiated by the molybdenum(III) chloride/dimethyl sulfoxide redox system was carried out at 70° in 1, 4-dioxane. The rate of polymerization can be described by the equation Rp = k · [MoCl3]0,5 · [DMSO]0,5 · [MMA]1,0. The overall activation energy was estimated to be 36.0 kJ/mol. It was found that diethyl, dipropyl, dibutyl, diphenyl and dibenzyl sulfoxides could also initiate the polymerization of methyl methacrylate in the presence of molybdenum(III) chloride, whereas vanadium(II) chloride, vanadium(III) chloride, titanium(III) chloride and chromium(II) acetate are inactive in combination with sulfoxides.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270409
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  • 10
    Electronic Resource
    Electronic Resource
    Ein krystallisiertes Hormon aus Corpus luteum. (Vorläufige Mitteilung) (1934)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 17 (1934), S. 878-882 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.193401701111
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