Magnetic field-induced alignment of molecular rotor-shaped cyclophanes

Molecular pinwheels consisting of dipolar substituted cyclophanes in solution can function as free microscopic rotors in the presence of a homogeneous static magnetic field ${\bf B}$ and a circularly polarized electric field E rotating on a plane containing B. Owing to the high magnetic anisotropy of [2$_6$](1,2,3,4,5,6)cyclophane and [3$_6$](1,2,3,4,5,6)cyclophane biased by strongring currents, $\approx1$ in 10$^{5}$ molecules are expected to align with the $C_6$symmetry axis perpendicular to a magnetic field of 21 tesla.The magnetic-field controlled alignment of rotor-shaped cyclophanes is insignificantly affected by non-polar solvent, e.g., toluene.