The scope of this review is the nature and dynamics of the singlet excited electronic states
created in nucleic acids and their constituents by UV light. Interest in the UV photochemistry …

Ultraviolet light is strongly absorbed by DNA, producing excited electronic states that
sometimes initiate damaging photochemical reactions. Fully mapping the reactive and …

DNA owes its remarkable photostability to its building blocks—the nucleosides—that
efficiently dissipate the energy acquired upon ultraviolet light absorption. The mechanism …

Ultrafast electronic relaxation of nucleobases from 1ππ* states to the ground state (S0) is
considered essential for the photostability of DNA. However, transient absorption …

The electronically excited singlet states of uracil have been studied theoretically using ab
initio multireference configuration interaction methods focusing on the mechanism for …

Ultraviolet irradiation of DNA produces electronic excited states that predominantly eliminate
the excitation energy by returning to the ground state (photostability) or following minor …

The photoinduced relaxation dynamics of pyrimidine nucleobases (uracil, thymine, and
cytosine) was studied using the surface-hopping approach at the semiempirical OM2/MRCI …

By employing broadband femtosecond Kerr-gated time-resolved fluorescence (KTRF) and
transient absorption (TA) techniques, we report the first (to our knowledge) femtosecond …

The steady-state and time-resolved photochemistry of the natural nucleic acid bases and
their sulfur-and nitrogen-substituted analogues in solution is reviewed. Emphasis is given to …

The first comprehensive quantum mechanical study of solvent effects on the behavior of the
two lowest energy excited states of uracil derivatives is presented. The absorption and …