Tunable two-dimensional molecular dipole dot arrays on graphite

We report the construction of two dimensional molecular dipole dot arrays with tunable dipole density via self-assembly of binary molecular system of dipolar molecule of chloroaluminium phthalocyanine (ClAlPc) with copper hexadecafluorophthalocyanine (F₁₆CuPc) on graphite surface, as revealed by in situ low-temperature scanning tunneling microscopy experiments. The formation of multiple intermolecular C-H^⋯F-C hydrogen bondings between the periphery F atoms on F₁₆CuPc and H atoms on neighboring ClAlPc molecules can ensure structural rigidity and stability for potential applications in molecular nanodevices.