The photophysics and photochemistry of DNA is of great importance due to the potential
damage of the genetic code by UV light. Quantum mechanical studies have played a key …

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 …

Radiationless deactivation pathways of excited gas phase nucleobases were investigated
using mass-selected femtosecond resolved pump-probe resonant ionization. By comparison …

The lifetimes of the excited state of free nucleobases were measured in the gas phase for
the first time. They are, respectively, 1.0 and 0.8 ps for the purine bases adenine (shown …

We present femtosecond time-resolved photoelectron spectra (TRPES) of the DNA and RNA
bases adenine, cytosine, thymine, and uracil in a molecular beam. We discuss in detail the …

Biochemical reactions are subject to the particular environmental conditions of planet earth,
including solar irradiation. How DNA responds to radiation is relevant to human health …

Distinct photophysical behavior of nucleobase adenine and its constitutional isomer, 2-
aminopurine, has been studied by using quantum chemical methods, in particular an …

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

The low-lying excited singlet states of the Watson–Crick form of the guanine–cytosine base
pair have been investigated with multi-reference ab initio methods (complete-active-space …

The DNA base adenine and four monomethylated adenines were studied in solution at room
temperature by femtosecond pump− probe spectroscopy. Transient absorption at visible …