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The UV-induced photoreaction of 9-methyladenine was investigated by low-temperature matrix-isolation infrared (IR) spectroscopy with an aid of the density-functional-theory (DFT) calculation. Shorter-wavelength irradiation, λ>240nm, caused the elimination of a hydrogen atom in the amino group, resulting in the production of two kinds of amino radicals: One immediately changed to an imine isomer...
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