Anions of the hydrogen-bonded guanine–cytosine dimer – theoretical study

The quantum mechanical calculations performed in this work revealed an interesting nature of the stationary states of an excess electron in the guanine–cytosine (G–C) anion. The electron can form either a dipole-bound (DB) state or a covalent state. The coexistence of the two states may enhance the ability of the G–C dimer to capture an excess electron.