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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: Die Emissions- und die UV-Spektren von monomeren und dimeren Modellverbindungen und von Polymeren, die Adenin-, 6-(Methylamino)purin-oder 6-(Dimethylamino)purin-Gruppen enthalten, wurden bei 77 K in Wasser/Äthylenglykol oder Äthanol vermessen. Es konnten so Informationen über den Charakter und die Stärke der zwischen den Nukleinbasen herrschenden Wechselwirkungen erhalten werden. Die Emissionsspektren der Dimeren und Polymeren zeigen bei geeignetem Abstand der Adeninringe starke Wechselwirkungen und die Bildung von Excimeren an. Allerdings wurden in Äthanol oder in Wasser/Äthylenglykol-Mischungen bei pH=2 keine Excimeremissionen mehr beobachtet. Die UV-Spektren lassen auf zwei verschiedene Arten von Wechselwirkungen zwischen den Nukleinbasen schließen, je nachdem ob diese „plane in plane“ oder koplanar angeordnet sind.
    Notes: The emission and the ultraviolet spectroscopies were studied at 77 K in water/ethylene glycol or ethanol for polymers containing adenine, 6-(methylamino)purine, and 6-(dimethylamino)purine moieties, and for the corresponding dimeric and monomeric model compounds, in order to obtain more information about the nature and extent of the interactions between nucleic acid bases in the polymer chains. The emission spectra of the dimeric compounds and the polymers suggested the formation of excimers and the existence of strong interactions between the adenine rings of suitable compounds. These excimer emissions were not observed in the spectra measured in ethanol, and in water/ethylene glycol solutions at pH 2. The ultraviolet spectra suggested two kinds of base-base interactions for plane in plane and coplanar arrangement.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
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