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  • 1970-1974  (3)
  • Chemistry  (3)
  • Polymer and Materials Science  (1)
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  • 1
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 146 (1971), S. 181-193 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyacenaphthylene shows excimer fluorescence in solid state and in solution at room temperature, which is not observed from copolymers of acenaphthylene and styrene. In these copolymers excitation energy is transferred from the units of styrene to those of acenaphthylene. In the solid state at room temperature excitation of the styrene units yields the fluorescence of the acenaphthylene units even from copolymers with small concentrations of acenaphthylene. The effect of energy migration occurs, too, in 2-methyltetrahydrofurane at 77 and 298°K, but to a much smaller extent. The mechanisms of energy migration are discussed.
    Notes: Polyacenaphthylen zeigt sowohl im Festzustand als auch in Lösung bei Raumtemperatur eine Excimerenfluoreszenz, die bei Copolymeren aus Acenaphthylen und Styrol nicht auftritt. Bei diesen Copolymeren erfolgt eine Wanderung der Anregungsenergie von den Styrol- zu den Acenaphthylenbausteinen, so daß bei Raumtemperatur selbst aus festen Copolymeren mit geringem Acenaphthylengehalt bei Anregung der Styrolbausteine nur die Fluoreszenz der Acenaphthylenbausteine emittiert wird. In 2-Methyltetrahydrofuran-Lösungen bei 77 und 298°K wird der Wanderungseffekt ebenfalls, jedoch wesentlich schwächer, beobachtet. Die Mechanismen der Energieübertragung werden diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 390 (1972), S. 53-60 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [TaOCl3· 2 CH3CN] and [TaSCl3· C6H5NCCl2] react with alkali thiocyanates in acetonitrile to complexes of the types [TaOCla(NCS)b· 2 CH3CN], [TaO(NCS)3. 2 CH3CN] and MI[TaO(NCS)4]· cCH3CN or [TaSCla(NCS)b· C6H5NCCl2], [TaS(NCS)3· C6H5NCCl2] and MI[TaS(NCS)4· C6H5NCCl2] (a = 1 or 2; b = 2 or1; MI = NH4, K, Na; c = 2 or 5). The prepared compounds are characterised by analytical data, IR- and electron transfer spectra.
    Notes: Reaktionen von [TaOCl3· 2 CH3CN] sowie [TaSCl3· C6H5NCCl2] mit Alkalithiocyanaten führen in Acetonitril zu Verbindungen des Typs[TaOCla(NCS)b· 2 CH3CN], [TaO(NCS)3· 2 CH3CN] und MI[TaO(NCS)4]· cCH3CN sowie [TaSCla(NCS)b· C6H5NCCl2], [TaS(NCS)3· C6H5NCCl2] und MI[TaS(NCS)4· C6H5NCCl2] (a = 1 bzw. 2; b = 2 bzw. 1; MI = NH4, K, Na; c = 2 oder 5). Die dargestellten Komplexe werden durch IR- und Elektronentransferspektren näher charakterisiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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