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Synthesis and characterization of transitional metal polypyridine complex fullerene salts

dc.contributor.authorHong, Jie, author
dc.contributor.authorElliott, C. Michael, advisor
dc.contributor.authorPrieto, Amy Lucia, committee member
dc.contributor.authorVan Orden, Alan K., committee member
dc.contributor.authorLadanyi, Branka M., committee member
dc.contributor.authorHochheimer, Hans D., committee member
dc.descriptionCovers not scanned.
dc.descriptionPrint version deaccessioned 2022.
dc.description.abstractIn recent years, ionic fullerene (C60) salts have attracted much attention due to their interesting chemical and physical properties. Transition metal polypyridine complex, most notably, tris (2, 2'-bipyridine)ruthenium-based compounds, [RuL3]m+, have a number of photochemical and electrochemical properties which make them of interest for both fundamental and applied studies. The similarity of electrochemical potentials of [RuL3] and C60"’ gives rise to the possibility of a new charge-transfer ionic salts [Ru L3m+]n(C6on-)m- In chapter I, the background of ionic C60 salts as well as the motivation of preparing transition metal polypyridine complex C60 salts is described in detail. A chart of electrochemical data is generated and used as a guideline to predict the possible stoichiometries of ionic salts throughout the whole research work. In Chapter II, the synthesis and characterization of three ionic salts using [Ru(bpy)3]m+ (m = 1, 2) as cations are fully described. All three salts are semiconducting with the highest conductivity at ~ 10 S • m-1. Interesting paramagnetism is reported as well. The detailed discussions based on single crystal and powder X-ray diffraction studies are useful in better understanding the electronic conduction and magnetism. The physical properties of ionic C60 salts can be rationalized based on the crystal packing. In the presence of a bulky cation Ru(bpy)3m+, an expanded crystal lattice is found with weak site-site interactions. In Chapter III, the ligand substitution effect of [RuL3 m+]n(C60n-)m is examined. Four ligands: 4, 4'-dimethyl-2, 2'-bipyridine (4DMB), 5, 5'-dimethyl-2, 2'-bipyridine (5DMB), 4, 4'-di-tert-butyl-2, 2'-bipyridine (TBB) and 4, 4', 5, 5'-tetramethyl-2, 2'- bipyridine (TMB) are chosen as the targets. The ligand substitution not only changes the redox potentials of cation Ru(bpy)3m1 but also alters its size. This provides a route for tuning the properties of [RuL3 ’”^]n(C6on-)m • Electrical and magnetic properties of all compounds as prepared are investigated. The highest conductivity found is also close to 10 S • m-1. In Chapter IV, the effect of substituting ruthenium by chromium in metal complex ionic C60 salts is studied. Cr(bpy)3 m+ and Ru(bpy)3 m+ are very similar in size but of quite different redox potentials. The electrical conductivity of their corresponding ionic salts shows large dependence on the redox potentials.
dc.format.mediumdoctoral dissertations
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991014245969703361
dc.relationQD181.R9 H655 2010
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see
dc.subject.lcshTransition metal complexes
dc.subject.lcshRuthenium compounds
dc.titleSynthesis and characterization of transitional metal polypyridine complex fullerene salts
dcterms.rights.dplaThis Item is protected by copyright and/or related rights ( You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). State University of Philosophy (Ph.D.)


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