Electronic interactions of expanded porphyrins with buckytubes


Peter J. Boul, pboul@cm.utexas.edu1, Dong-Gyu Cho, dgcho@cm.utexas.edu1, G. M. Aminur Rahman, aminur.rahman@chemie.uni-erlangen.de2, Jayneil M. Kamdar, jkamdar@mail.utexas.edu1, Manuel Marquez3, Dirk M. Guldi, guldi@chemie.uni-erlangen.de2, and Jonathan L. Sessler, sessler@mail.utexas.edu4. (1) Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station-A5300, Austin, TX 78712, (2) Institute for Physical and Theoretical Chemistry, Universität Erlangen-Nürnberg, Egerlandstr. 3, Erlangen, 91058, Germany, (3) INEST Group, Research Center, Philip Morris USA, Inc, Richmond, VA 23234, (4) Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station-A5300, Austin, TX 78712-0165
Buckytubes bind strongly to sapphyrins, quintessential pentapyrrolic “expanded porphyrin” macrocycles, through pi-stacking interactions. When the sapphyrin is appropriately functionalized, the interaction between the tubes and the macrocycles yield stable water-suspendable nanotubes. The absorption and fluorescence spectra of the resulting non-covalently functionalized nanotube material have been analyzed in aqueous solutions, yielding an initial description of the photophysical properties of the nanotube-sapphyrin complexes. The results of these analyses will be presented, along with determinations of material stability, and the effect of the nanotube-sapphyrin interaction on the anion binding properties of the sapphyrins.

This poster is dedicated to the memory of Richard E. Smalley. The work was supported in part by Philip Morris USA and by the National Institutes of Health.