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| CHRISTOPHER J. ZIEGLER |
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| Assistant Professor |
| B.A., 1992 Bowdoin College |
| Ph.D., 1997, University of Illinois at Urbana-Champaign |
| Postdoctoral fellow, 1997-2000, Massachusetts Institute of Technology |
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| Office: KNCL 404 |
| (330) 972-2531 |
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| Lab: KNCL 402 |
| (330) 972-8392 |
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| Research Interest |
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Our interests focus on coordination chemistry and understanding the synergistic relationships between metals and ligands in biomolecules and materials. While the coordination of small molecules to metal centers is relatively well understood, the effect of complex ligand environments is still an area of intense investigation. Our research examines metal ions in complex coordination environments, including tetrapyrrolic macrocycles and coordination polymers as advanced materials.
Metalloporphyrins have been studied for more than a century and many researchers have probed the relationship between macrocycle structure and the metal center. However, the metal complexes of porphyrin isomers (such as porphycene or N-confused porphyrin), porphyrin analogs (such as corrole) and other pyrrolic macrocycles have not been as extensively studied. Not only are porphyrin isomers and analogs excellent potential ligands for transition metals, but these compounds also can be used to examine the effects of aromaticity and central pore size on metal structure and reactivity. Our research examines the metal complexes of novel polypyrrolic ligands, in part as an attempt to determine the reasons behind the natural selection of porphyrin as the tetrapyrrole of choice. We have published several reports on the fundamental chemistry of N-confused porphyrin, with a focus on photochemistry and the chemistry of manganese.
Coordination polymers as mineral analogs are novel systems where judicious use of ligands as synthons can result in functional materials. In mineral mediated catalysis, the size and directionality of the pores restrict the formation of certain reaction products. By designing coordination polymers to mimic the structure of a mineral, we fuse transition metal functionality with the nanoscale organization of a crystalline array. Our research interests in this area include increasing the three-dimensionality of ordered coordination solids through the use of tetrahedral borate synthons as well as incorporating metal active sites for chemical reaction. We have recently focused on the chemistry of tetrakis(imidazolyl)borate, and have used this synthon to generate novel, functional materials that exhibit topology-dependent physical and chemical reactivity. |
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| Selected Publications |
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Wu, Q.; Cetin, A.; Durfee, W. S.; Ziegler, C. J. “Metal mediated C-H bond activation in a carbon substituted hemiporphyrazine” Angewante Chemie, 2006; 45(34), 5670-5673.
Herrick, R.S.; Brunker, T.J.; Maus, C.; Crandall, K.; Cetin, A.; Ziegler, C.J. “Aqueous preparation and physiological stability studies of Re(CO)3(scorpionate) compounds” Chemical Communications, 2006; (41), 4330 - 4331.
Herrick, R.S.; Ziegler, C.J.; Cetin, A.; Brunker, T.J. “Structure of the triaquatricarbonylrhenium(I) cation and its conjugate base” European Journal of Inorganic Chemistry, 2007, (12): 1632-1634.
Hamilton, B. H.; Kelly, K. A.; Wagler, T. A.; Espe, M. P.; Ziegler C. J. (2004) “Lead Tetrakis(imidazolyl)borate solids: Anion exchange, solvent intercalation, and self assembly of an organic anion” Inorganic Chemistry, 43(1) 50-56.
Hamilton, B. H., Kelly, K. A., Malasi, W., Ziegler, C. J. (2003) “Tetrakis(imidazolyl)borate-based Coordination Polymers: Group II Network Solids, M[B(Im)4]2(H2O)2 (M = Mg, Ca, Sr)” Inorganic Chemistry, 42(9) 3067-3073.
Hamilton, B. H., Kelly, K. A. Wagler T. A., Espe, M. P., Ziegler, C. J. (2002) “The construction of a functional layered solid using the tetrakis(imidazolyl)borate coordinating anion” Inorganic Chemistry, 41(20), 4984-4986.
Harvey, J. D.; Ziegler, C. J. (2003) “Developments in the metal chemistry of N-confused porphyrin” Coordination Chemistry Reviews, 247 (1-2) 1-19.
Harvey, J. D.; Ziegler, C. J. (2003) "CH bond activation and meso carbon reduction in manganese N-confused porphyrins" Chemical Communications, (23) 2890-2891.
Harvey, J. D., Ziegler, C. J. (2002) “Dimeric and monomeric forms of manganese N-confused porphyrin” Chemical Communications, (17), 1942 – 1943.
Hamilton, B. H., Ziegler C. J. (2002) “The structures of Cu(I) and Ag(I) coordination polymers using the tricyanofluoroborate anion” Chemical Communications, (8), 842-843.
Belair, J. P., Ziegler, C.J., Rajesh, C. S., Modarelli, D. A. (2002) “Photophysical characterization of free-base N-confused tetraphenylporphyrins” Journal of Physical Chemistry A, 106(27): 6445-6451.
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