Assembly and rotary motions of sandwich rare earth complexes

INOR 969

Tao Ye, tuy1@psu.edu1, Tomohide Takami, takami@visionarts.co.jp2, Jianzhuang Jiang3, and Paul S. Weiss, stm@psu.edu1. (1) Departments of Chemistry and Physics, The Pennsylvania State University, State College, PA 16802, (2) Visionarts Research, Inc, 104 Davey Laboratory, University Park, PA 16802, (3) Department of Chemistry, Shandong University, Jinan, China
We seek to understand and to control rotary motions in supramolecular surface structures of double decker sandwich complexes (DDs), where rings of porphyrin derivatives are connected by a lanthanide center. To achieve this end, we need to constrain their degrees of freedom. We control spacings and orientations of DDs using both molecular design and self-assembly. The location of the rotor molecules can be controlled via scanning tunneling microcopy (STM) tip manipulation. STM observations of the DDs in a controlled local environment reveal that the rotary motions proceed via activated hopping. We discuss our efforts to control rotation through photoexcitation, electrochemistry, and chemical binding.

 

Coordination Chemistry: Characterization and Applications
1:30 PM-5:30 PM, Wednesday, 13 September 2006 Moscone Center -- Room 305, Oral

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006