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in subjects: "Ligands"  
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Reaction chemistry and ligand exchange at cadmium selenide nanocrystal surfaces

Description: Chemical modification of nanocrystal surfaces is fundamentally important to their assembly, their implementation in biology and medicine, and greatly impacts their electrical and optical properties. However, it remains a major challenge owing to a lack of analytical tools to directly determine nanoparticle surface structure. Early nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) studies of CdSe nanocrystals prepared in tri-n-octylphosphine oxide (1) and tri-n-octylpho… more
Date: December 2, 2008
Creator: Owen, Jonathan; Park, Jungwon; Trudeau, Paul-Emile & Alivisatos, A. Paul
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Partner: UNT Libraries Government Documents Department
open access

Modeling multivalent ligand-receptor interactions with steric constraints on configurations of cell surface receptor aggregates

Description: Signal transduction generally involves multivalent protein-protein interactions, which can produce various protein complexes and post-translational modifications. The reaction networks that characterize these interactions tend to be so large as to challenge conventional simulation procedures. To address this challenge, a kinetic Monte Carlo (KMC) method has been developed that can take advantage of a model specification in terms of reaction rules for molecular interactions. A set of rules impli… more
Date: January 1, 2008
Creator: Monine, Michael; Posner, Richard; Savage, Paul; Faeder, James & Hlavacek, William S
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Partner: UNT Libraries Government Documents Department
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Electronic and optical response of functionalized Ru(II) complexes: joint theoretical and experimental study

Description: New photovoltaic and photocatalysis applications have been recently proposed based on the hybrid Ru(II)-bipyridine-complex/semiconductor quantum dot systems. In order to attach the Ru(II) complex to the surface of a semiconductor, a linking bridge -- a carboxyl group -- needs to be added to one or two of the 2,2'-bipyridine (bpy) ligands. Such changes in the ligand structure affect electronic and optical properties and, consequently, the charge transfer reactivity of Ru(II)-systems. In this stu… more
Date: January 1, 2008
Creator: Kilina, Svetlana; Tretiak, Sergei; Sykora, Milan; Albert, Victor; Badaeva, Ekaterina & Koposov, Alexey
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Partner: UNT Libraries Government Documents Department
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Neptunium (VI) and neptunium (VI/V) mixed valence cluster compounds

Description: Neptunium has three readily accessible oxidation states, IV, V and VI, which can coexist under certain conditions, with the aqueous soluble neptunyl(V) moiety, {l_brace}NpO{sub 2}{r_brace}{sup +}, of most environmental relevance. Careful control of Np chemistry is required during actinide separation processes. In addition, the long half life of the major alpha emitting isotope ({sup 237}Np, t{sub 1/2} = 2.144 x 10{sup 6} years) renders Np a major contributor to the radiotoxicity of nuclear wast… more
Date: January 1, 2008
Creator: May, Iain
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interplay of metal-allyl and metal-metal bonding in dimolybdenum allyl complexes

Description: Addition of PMe{sub 3} to Mo{sub 2}(allyl){sub 4} afforded Mo{sub 2}(allyl){sub 4}(PMe{sub 3}){sub 2}, in which two of the allyl groups adopt an unprecedented {mu}{sub 2{sup -}}{eta}{sup 1}, {eta}{sup 3} bonding mode; theoretical studies elucidate the role sof the {sigma}- and {pi}-donor ligands in the interplay of metal-allyl and metal-metal bonding.
Date: January 1, 2008
Creator: John, Kevin D.; Martin, Richard L.; Obrey, Steven J. & Scott, Brian L.
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Partner: UNT Libraries Government Documents Department
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Efficient Route to Highly Water-Soluble Aromatic Cyclic Hydroxamic Acid Ligands

Description: 2-Hydroxyisoquinolin-1-one (1,2-HOIQO) is a new member of the important class of aromatic cyclic hydroxamic acid ligands which are widely used in metal sequestering applications and metal chelating therapy. The first general approach for the introduction of substituents at the aromatic ring of the chelating moiety is presented. As a useful derivative, the highly water-soluble sulfonic acid has been synthesized by an efficient route that allows general access to 1,2-HOQIO 3-carboxlic acid amides… more
Date: February 6, 2008
Creator: Seitz, Michael & Raymond, Kenneth N.
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Partner: UNT Libraries Government Documents Department
open access

Gd-HOPO Based High Relaxivity MRI Contrast Agents

Description: Tris-bidentate HOPO-based ligands developed in our laboratory were designed to complement the coordination preferences of Gd{sup 3+}, especially its oxophilicity. The HOPO ligands provide a hexadentate coordination environment for Gd{sup 3+} in which all he donor atoms are oxygen. Because Gd{sup 3+} favors eight or nine coordination, this design provides two to three open sites for inner-sphere water molecules. These water molecules rapidly exchange with bulk solution, hence affecting the relax… more
Date: November 6, 2008
Creator: Datta, Ankona & Raymond, Kenneth
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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