A bis-corannulene based molecular tweezer with highly sensitive and selective complexation of C70 over C60

A new molecular tweezer with two corannulene subunits linked by a tetrahydro[5] helicene imide was conveniently synthesized, which showed highly sensitive and selective complexation of C-70 over C-60 via concave-convex pi-pi- interactions, and the K-C70/K-C60 value even was found to be 230/1.