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  • 1
    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: 2.4-Diphenyl-6-styryl-s-triazine (P2ST), 2.4-diphenyl-6-(p-dimethylaminostyryl)-s-triazine (P2AT), and 2.4-diphenyl-6-(p-nitrostyryl)-s-triazine (P2NT) yield dimers with cyclobutane structures by ultraviolet irradiation in refluxing toluene solution. The rate of dimerization decreases in the series toluene 〉 ethylacetate 〉 chloroform. By irradiation of 2-phenyl-4.6-distyryl-s-triazine (PS2T), 2-phenyl-4.6-bis-(p-dimethylaminostyryl)-s-triazine (PA2T), and 2-Phenyl-4.6-bis-(p-nitrostyryl)-s-triazine (PN2T) polymers are obtained. The polymers decomposed during prolonged irradiation in toluene but not in benzene solution as shown by viscosimetric measurements.
    Notes: 2.4-Diphenyl-6-styryl-s-triazin (P2ST), 2.4-Diphenyl-6-(p-dimethylaminostyryl)-s-triazin (P2AT) und 2.4-Diphenyl-6-(p-nitrostyryl)-s-triazin (P2NT) gehen beim Belichten mit UV-Licht in siedender toluolischer Lösung in Dimere mit Cyclobutanstruktur über. Die Geschwindigkeit der Dimerisierung nimmt in der Reihenfolge Toluol 〉 Äthylacetat 〉 Chloroform ab. Die Belichtung von 2-Phenyl-4.6-distyryl-s-triazin (PS2T), 2-Phenyl-4.6-bis-(p-dimethylaminostyryl)-s-triazin (PA2T) und 2-Phenyl-4.6-bis-(p-nitrostyryl)-s-triazin (PN2T) führte zu Polymeren. In Toluol, nicht aber in Benzol, wurde dabei viskosimetrisch ein mit fortschreitender Zeit zunehmender Abbau der Polymeren beobachtet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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