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Functional monomers and polymers. CII. Synthesis and properties of oligomer models of polyethyleneimine derivatives containing pendant adenine bases

✍ Scribed by Sakuma, Yo ;Inaki, Yoshiaki ;Takemoto, Kiichi

Publisher
John Wiley and Sons
Year
1982
Weight
667 KB
Volume
20
Category
Article
ISSN
0360-6376

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✦ Synopsis

Abstract

A series of oligomer model compounds of polyethyleneimine derivatives with pendant adenine bases were prepared by the reaction of a carboxyethyl derivative of adenine with oligomeric amines, using an activated ester method. To evaluate the intramolecular interaction between pendant adenine bases in these compounds, ultraviolet spectra at various pH regions were measured. Ultraviolet hypochromicities and pK~a~ values depended linearly on the chain length of the oligomers. The results showed that the intramolecular interactions of adenine bases were realized less in their protonated than neutral forms.

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