Robert J. DoedensProfessor, Chemistry Associate Dean, Physical Sciences |
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Research Interests |
Structural Inorganic Chemistry | |
| URL | www.chem.uci.edu/people/faculty/rdoedens/ | |
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Academic Distinctions | National Science Foundation Predoctoral Fellow | |
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Research Abstract |
Professor Doedens is Associate Dean of the School of Physical Sciences. He was a National Science Foundation Predoctoral Fellow at the University of Wisconsin where he received his Ph.D. degree in 1965. He obtained his B.S. degree from the University of Wisconsin, Milwaukee in 1961. Structural Inorganic Chemistry Inorganic chemists continue to produce compounds that have novel structures and that frequently exhibit unusual physical and chemical properties. Our research is concerned with investigating the structures of such compounds and with attempting to understand the influence of their structures on their properties. Specific areas of recent interest have included organometallic compounds, metal complexes of macrocyclic ligands, polyoxometallate derivatives, organic-inorganic hybrid materials, and compounds that exhibit cooperative magnetic behavior. One area of interest has been the study of transition metal complexes with unusual magnetic properties arising from interaction between two or more paramagnetic centers. These centers are frequently metal ions but one or more of them may also be ligand-centered radicals. The magnetic behavior of these complexes has been found to be highly variable, depending sensitively on the electronic structures of the interacting species and on their stereochemical relationship. Much has been learned about the influence of factors like these on the properties of isolated molecules and this information is beginning to be applied to the design and preparation of extended systems with interesting, and potentially useful, magnetic and electrical properties. Much of our recent effort has been devoted to the study of materials derived from polyoxometallates and from inorganic complexes combined with organic ligands whose stereochemical requirements are well defined. By appropriate choices of building blocks, it has proven possible to produce aggregates of varying sizes that frequently have extended structures in one-, two-, or three dimensions. Many of these structures exhibit features such as open channels, container clusters, and the like. These types of systems can also provide an environment that stabilizes unusual chemical species, two recent examples of which are new types of water clusters (H2O)n (n = 6, 8) and the previously unknown Zn2(H2NCH2C H2NH2)54+ cation.    
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| Publications | "Hydrothermal Synthesis and Characterization of a New Vanadyl Sulfate Compound: Crystal Structure of [VIVOSO4(H2O)4 ].SO4 .[H2N(C2H 4)2NH2]," M. Ishaque Khan, Sabri Cervik, and Robert J. Doedens, Inorganica Chimica Acta, 1999, 112-116. | |
| "The Trivalent Neodymium Complex [(C5Me5)3 Nd] Is a One-Electron Reductant," William J. Evans, Gregory W. Nyce, Robert D. Clark, Robert J. Doedens, and Joseph W. Ziller, Angewandte Chemie Int. Ed. Engl., 1999, 38, 1801-1803. | ||
| "Metal Oxide Based Framework Materials Composed of Polyoxovanadate Clusters: Synthesis and X-Ray Crystal Structures of [M3V18O42 (H2O)12(XO4 )].24H2O (M = Fe, Co; X = V, S)," M. Ishaque Khan, Elizabeth Yohannes, and Robert J. Doedens, Angewandte Chemie Int. Ed. Engl., 1999, 38, 1292-1294. | ||
| "Framework Materials Containing Polyoxovanadates as Building Units: Synthesis and Characterization of (N2H5)2[M 3(H2O)12 V18O42(EO4 )].24H2O (M = Mg, Ca) and Li6[Mn3(H2 O)12V18O 42(EO4)].2 4H2O (E = V, S)," M. Ishaque Khan, Elizabeth Yohannes, Robert J. Doedens, Saadia Tabussum, Sabri Cevik, Larry Manno, and Douglas Powell, Crystal Engineering 1999, 2,171-179. | ||
| "Inorganic-organic Hybrids Derived from Oxovanadium Sulfate Motifs: Synthesis and Characterization of [VIVO(m 3-SO4)(2,2-bpy)]n ," Ishaque Khan, Sabri Cevik, and Robert J. Doedens, J. Chem. Soc. Chem. Commun., 2001, 1930-1931. | ||
| "Tetramethylpiperidinyl-1-oxy (TEMPO) as a Ligand in Lanthanide Chemistry: Synthesis of the per(TEMPO) Complex [(TEMPO)2Sm(m-TEMPO)]2, " Evans WJ, Perotti JM, Doedens RJ, Ziller JW, J. Chem. Soc. Chem. Commun. 2001, 2326-2327. | ||
| "Novel Water Clusters in the Crystalline State: Structures of a Symmetrical, Cyclic Hexamer and an "Opened-cube" Octamer," Doedens RJ, Yohannes E, Khan MI, J. Chem. Soc. Chem. Commun. 2002, 62-63. | ||
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Composite Materials Derived From Oxovanadium Sulfates. In "Polyoxometalates for Nanocomposites," T. Yamase and M. T. Pope, Ed., Kluwer: Dordrecht, M. Ishaque Khan, Sabri Cevik and Robert J. Doedens, 2002 |
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| "Novel Nanostructured Materials Composed of Arrays of Vanadium Oxide Container Molecules {V18O42(X)} (X = H2O, Cl-, Br-): Synthesis and Structures of [M2(H2N(CH2)2NH2)5][{M(H2N(CH2)2NH2)2}V18O42(X)].9H2O (M = Zn, Cd)," M. Ishaque Khan, Elizabeth Yohannes, and Robert J. Doedens, Inorg. Chem., in press, (2003). | ||
| "A Novel Cationic Heteropolyoxovanadium(IV) Cluster Functionalized with Organic Ligands: Synthesis and Characterization of the Fully Reduced Species [MnIIVIV6O6 {(OCH2CH2)2 N(CH2CH2OH)}6]Cl2," M. Ishaque Khan, Saadia Tabussum, and Robert J. Doedens, J. Chem. Soc. Chem. Commun., 2003, 532-533. | ||
| Link to this profile | http://www.faculty.uci.edu/profile.cfm?faculty_id=2030 | |
| Last updated | 04/08/2003 | |
