Collect. Czech. Chem. Commun. 2005, 70, 1970-1985

Self-Assembled Trigonal Prismatic Altitudinal Rotors with Triptycene Paddle Wheels

Douglas C. Caskey, Bing Wang, Xiaolai Zheng and Josef Michl*

Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, U.S.A.


We describe the synthesis of a trigonal prismatic molecular rotor by self-assembly from paddlewheel carrying molecular rods and trigonal star connectors in a 3:2 ratio. The rod is 9,10-diethynyltriptycene terminated in transversely reactive [Pt(dppp)]+ groups (dppp = 1,3-bis(diphenylphosphino)propane) and the connector is 1,3,5-tris[(4-pyridyl)ethynyl]benzene. The structure of the molecular rotor has been established by 2-D NMR and MS, including diffusion-ordered NMR and collision-induced dissociation.

Keywords: Molecular rotors; Molecular machines; Triptycenes; Platinum complexes; Alkynes; Pyridines; Self assembly; NMR spectroscopy; Mass spectrometry.

References: 39 live references.