Infrared studies and the effect of ultraviolet irradiation on the tautomers of 9-methylguanine isolated in an argon matrix

Autor: Marian Szczesniak, Krystyna Szczepaniak, Willis B. Person
Rok vydání: 1988
Předmět:
Zdroj: Chemical Physics Letters. 153:39-44
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)80129-5
Popis: The infrared spectrum of 9-methylguanine isolated in an argon matrix at 15 K, and the effect of ultraviolet irradiation on this spectrum, are presented and discussed. These studies prove that the amino-oxo and amino-hydroxy tautomers of 9-methylguanine are present in the matrix and allow the separation of the overlapping spectra of these forms. The concentrations of both tautomers in the matrix are approximately the same while in solutions and in crystal only the amino-oxo form is present. This finding may have important biological implications related to the possible appearance of guanosine-(amino-hydroxy)-thymidine base pairs.
Databáze: OpenAIRE