Intersystem crossing in 5-azacytosine: time-resolved photoelectron and quantum-chemical insights into the effect of aza substitution on cytosine
Royal Society of Chemistry·June 3, 2026
Single-atom substitutions in nucleobases can cause drastic changes in their photophysical response to ultraviolet radiation, in particular their propensity for intersystem crossing. Azabases are formed by replacing an endocyclic carbon atom with a nitrogen atom. 5-Azacytosine (5AC), an aza-derivative of cytosine wi
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