Superconductivity in Sm-doped [n]phenacenes (n = 3, 4, 5).

We report here the discovery of a new aromatic hydrocarbon superconductor, Sm-doped chrysene, with Tc ∼ 5 K, and compare its behavior with those measured in the full series of Sm-doped [n]phenacene superconductors, with n = 3, 4, 5, thus determining the trend of Tc as a function of the number of fused benzene rings and for an odd or even number of units.