| Near-IR Absorption Spectra for the C70 Fullerene Anions |
20 JUL 92 |
19 pages |
| Authors:
Del R. Lawson; Daniel L. Feldheim; Colby A. Foss; Peter K. Dorhout; C. M. Elliott; COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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 | C70, like C60, can exist in a number of oxidation states including C70(1-), C70(2-), C70(3-) and C70(4-). We have discovered unique visible and near-IR absorption transitions which appear upon reduction of C70. These transitions are observed upon one, two, three and four-electron electrochemical reductions of C7O- In contrast to C60, however, the electronic properties of C70 are less well understood. In particular, previous theoretical studies of C7O(l-) failed to predict ... |
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| Near-IR Absorption Spectra for the Buckminsterfullerene Anions: An Experimental and Theoretical Study |
08 MAY 92 |
12 pages |
| Authors:
Del R. Lawson; Daniel L. Feldheim; Colby A. Foss; Peter K. Dorhoug; C. M. Elliott; COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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| C60 can exist in a number of oxidation states including C60(1-), C60(2-) and C60(3-). Ultraviolet-visible absorption data have been described. Near-infrared absorption data have not been presented for any of the oxidation states of C60. we have discovered that this is a serious oversight, because near-IR absorption peaks which are unique to C60(1-) C60(2-) and C60(3-) are observed upon one, two and three electron electrochemical reductions of C60. We have ... |
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| Substrate Induced Ordering of Molecular Absorbates on Au(111) |
27 FEB 92 |
12 pages |
| Authors:
Joachim H. Scott; Claudia R. Arana; Hector D. Abruna; Helen H. Petach; C. M. Elliott; MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE
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| Adsorbed monolayers of Ru(bpy)2bpy-(CH2)x-(bpy)2+(x=4 and 5) on the unreconstructed and reconstructed surfaces of gold(111) were imaged by scanning tunneling microscopy in dimethylformamide. On the reconstructed surface, the adsorbed films display highly-ordered patterns that are commensurate with the measured corrugation patterns of the substrate, STM images reveal a random spatial distribution. The key finding in our study is that the observed supramolecular structures of electroactive films on the reconstructed surface are ... |
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| Transition Metal Chelate-Fulleride Compounds: Electrocrystallization of Semiconducting (Ru(bpy)3)(C60)2 |
FEB 92 |
13 pages |
| Authors:
Colby A. Foss Jr.; Daniel L. Feldheim; Del R. Lawson; Peter K. Dorhout; C. M. Elliott; COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY
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| Two recent breakthroughs in the chemistry of fullerenes have provided the impetus for using fullerenes to prepare novel solid state materials: a method to produce large amounts of C60 and related materials, and the discovery of superconductivity in fullerides of K, Rb and Cs. The superconducting alkali metal compounds, which appear to contain C60(3-), show a trend toward higher transition temperatures upon increasing the size of the unit cell up ... |
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| Existence for a Problem in Ground Freezing |
AUG 1983 |
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| Authors:
E. DiBenedetto; C. M. Elliott; WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER
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 | A system of two elliptic p.d.e.'s, which model the conduction- convection problem in a porous medium with change of phase is considered. The first equation describes the heat conduction and holds in a fixed domain. The second takes into account the convective motions and holds in the unknown melted part of the region. The existence of a locally regular weak solution is proved by making use of various compactness arguments. ... |
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| Resume of Research Studies of Hydraulic Characteristics of Mississippi River Channels. Interim Report FY 1967. Potamology Research Project 10. |
APR 1967 |
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| Authors:
P. W. Pierce III; C. M. Elliott; ARMY ENGINEER DISTRICT VICKSBURG MISS
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| This report presents a brief description of field and office studies of the hydraulic characteristics of selected cross sections and reaches of the Lower Mississippi River through FY 1966. These studies are a part of the general potamology investigations for improving techniques for stabilizing the bed and banks of the Mississippi River. The general purpose of the previous studies was to analyze the hydraulic factors and elements of the river ... |
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