Abstract
Polymer effects on the interaction of nucleic acid bases in oligomer models of synthetic nucleic acid analogs were studied. Oligomers of polyethyleneimine derivatives containing nucleic acid bases were prepared and ultraviolet spectra and photochemical reactions were studied in order to evaluate the intramolecular and intermolecular interactions between pendant nucleic acid bases in these compounds. The intramolecular interaction was found to be caused by the nearest neighboring units, and to be independent on the remote units. The intramolecular interaction was found to closely relate to the intermolecular interaction of the nucleic acid analogs, and to the photodimerization of thymine bases in the oligomers and in the polymers.
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