Design and synthesis of high nuclearity lanthanide complexes

INOR 791

Xiaoping Yang1, Richard A. Jones, rajones@mail.utexas.edu1, Kyriacos Agapiou1, William J McCarty1, Joseph H Rivers1, Abdul Waheed2, Benjamin P. Hahn1, and Keith J. Stevenson, stevenson@cm.utexas.edu1. (1) Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, (2) Department of Chemistry, Virginia Tech, Blacksburg, VA 24060
Control over the stoichiometries and structures of polynuclear lanthanide complexes is challenging due to the difficulty in controlling the often high and variable coordination environment of Ln(III) ions. Despite this we have successfully prepared and characterized a variety of higher nuclearity Ln(III) complexes using relatively simple and inexpensive ligands. Examples include [Eu2Zn4L4(OAc)6(OH)2]2Et2O (1), (HL = 5, bromo-3-methoxysalicylaldehyde), which features a cage-like cavity and a porous 3-dimensional framework which reversibly encapsulates small organic molecules such as Et2O and MeOH. Use of "salen" type Schiff base ligands (SB) in combination with suitable linker groups has also enabled the synthesis of complexes such as the hexanuclear prism [Zn4Nd2L4(BDC)2]+2 (2), (L = SB, BDC = benzenedicarboxylate) and the octanuclear Eu(III) cage [Eu8L4(BDC)2Cl8(MeOH)12]+4 (3). The structures, photophysical properties, porous 3D frameworks, host-guest behavior and anion encapsulation characteristics of these and related complexes will be described.
 

Organometallics
7:00 PM-10:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Division of Inorganic Chemistry

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