COLL 547 |
| Michel R. Gagné, Department of Chemistry, University of North Carolina at Chapel Hill, CB#3290, Chapel Hill, NC 27599 and Jennifer J. Becker, Department of Chemistry, University of North Carolina, CB#3290, Chapel Hill, NC 27599. |
Free radical polymerization of cross-linking monomers co-mixed with ~50 vol% of a porogen (typically THF, toluene, ClPh) generates monolithic materials with a permanent pore structure and high surface areas (up to 800 m2/g). These insoluble materials function as excellent hosts for supporting (via polymerizable metallomonomers) transition metal catalysts. In addition to providing a material with accessible internal volumes (via the permanent pores), these materials are also susceptible to molecular imprinting. Removal of a portion of the metallomonomer reveals shaped cavities with long-term memory for the size, shape and functionality of the imprinting portion of the metal complex. In the case of chiral imprinting ligands, chiral cavities ensue. The effect of these chiral cavities on the enantio-reactivity of the imbedded metal complex will be the topic of this presentation, especially emphasizing efforts to homogenize the distribution of chiral cavities. |
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Chiral Surfaces
Division of Colloid and Surface Chemistry |