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Design of Organic-Inorganic Hybrid Lanthanide and Actinide Materials Christopher L. Cahill, The George Washington Univer

Design of Organic-Inorganic Hybrid Lanthanide and Actinide Materials Christopher L. Cahill, The George Washington University, DMR 0348982.

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Design of Organic-Inorganic Hybrid Lanthanide and Actinide Materials Christopher L. Cahill, The George Washington Univer

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  1. Design of Organic-Inorganic Hybrid Lanthanide and Actinide MaterialsChristopher L. Cahill, The George Washington University,DMR 0348982 Efforts in the Cahill group continue to explore hydrothermal, in situ ligand synthesis as a route to uranyl containing hybrid materials. Briefly, this involves the formation of organic linker molecules or inorganic building units that are not initially present as reactants. As a consequence, synthesis of such materials is not possible starting directly from preformed reactants and in turn leads to novel topologies and structure types. Two examples are shown at right. Top: [(UO2)5(HPO4)3(PO4)F4] (H9C10N2)3 was formed from treatment of PF6- anions that hydrolyzed to form phosphate tetrahedra. Bottom: (UO2)4(HO3PCH2CO2)(O3PCH2CO2)2(H2O)4·3H2O was formed from hydrothermal treatment of triethylphosphonoacetic acid that hydrolyzed to form phosphonoacetic acid. Yellow polyhedra are uranyl centers; brown are phosphate tetrahedra. Hydrolysis schemes de Lill, D. T.; Cahill, C. L. Cryst. Growth Des.2007, 7, 2390-2393. Dean, N. E.; Hancock, R. D.; Cahill, C. L.; Frisch, M. Inorg. Chem.2008, 47, 2000-2010. Ziegelgruber, K. L.; Knope, K. E.; Frisch, M.; Cahill, C. L. J. Solid State Chem.2008, 181, 373-381. Frisch, M.; Cahill, C. L. Cryst. Growth Des.2008, 8, 2921-2928. Knope, K. E.; Cahill, C. L. Inorg. Chem.2008.

  2. Design of Organic-Inorganic Hybrid Lanthanide and Actinide MaterialsChristopher L. Cahill, The George Washington University,DMR 0348982 Outreach Education • Science Fair Judging • Yorktown High School, Arlington Virginia • Professor Cahill and graduate students (Nick Deifel and Karah Knope) participated in the 2008 Science Fair as Category Judges in Chemistry. • DC Scientific Community • Professor Cahill is currently the President of • the GW Chapter of Sigma Xi • National/International Community • Professor Cahill is a member of the US National Committee for Crystallography as well as a member of the Continuing Education Committee for the American Crystallographic Association • Professor Cahill received a Fulbright Award to spend the Fall 2008 semester at the University of Cardiff, Wales. Research Group 2008 Graduate Students: Daniel DeLill (Ph.D. 2008) Mark Frisch (Ph.D. 2008), Karah Knope*, Nicholas Deifel. Undergraduates: Zach Horne (BS expected 2009), Andrew Kerr- REU student from IUP (BS expected 2008) *Spent summer 2008 at Kyoto University as an NSF-EAPSI grant recipient. Left: Andrew Kerr- an REU student from Indiana University of Pennsylvania Right: Nick Deifel with a Yorktown High School Science Fair hopeful.

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