Author/Authors :
Ohyama، نويسنده , , Kazuko and Goto، نويسنده , , Kenta and Shinmyozu، نويسنده , , Teruo and Yamamoto، نويسنده , , Norifumi and Iizumi، نويسنده , , Shota and Miyagawa، نويسنده , , Masaya and Nakata، نويسنده , , Munetaka and Sekiya، نويسنده , , Hiroshi، نويسنده ,
Abstract :
Infrared (IR) spectra of the enol and keto forms of 4-amino-6-oxopyrimidine (AOP) isolated in a low-temperature Xe matrix were recorded, where the change from the keto to the enol form was found to be induced by UV irradiation (λ > 270 nm). On the other hand, the hydrated crystal of AOP exhibited a similar IR spectrum to the anhydrous crystal by dehydration, suggesting that the dehydrated and anhydrous crystals are polymorphs. It has been found from the IR spectral analyses that the AOP crystal is dominated by infinite double H-bonded ribbons, which has been supported by quantum chemical calculations.
