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Showing 1 to 20 of 24 for “"Carborane"”.
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Synthesis and reactivity of ortho-carborane functionalized boron species.
… of highly electron withdrawing and bulky ortho-carborane substituents as Lewis acids for Frustrated Lewis Pair (FLP) chemistry. FLP chemistry is a three-component reaction that involves the use of a Lewis acid (LA), Lewis base (LB) and a substrate. This chemistry has been applied in bond …
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Synthesis and characterization of ring-opening metathesis polymers with pendant carborane groups
… (ROMP) polymers functionalized with pendant carborane (C2B10HI2) groups was synthesized. Norbomene-based polymers with the bulky, pseudoaromatic functionality were found to have glass transition temperatures (Tg's) between 29 °C and 290 °C. This variation in Tg can be attributed to structural …
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Neue Carborane aus CB 2 -, CB 3 - und C 2 B 2 -Organoboranen
… instabil ist und sich einerseits zu nido-C4B2-Carboranen umlagert und andererseits zu polymeren Produkten unbekannter Zusammensetzung weiterreagiert. Wird frisch synthetisiertes 1,3-Dihydro-1,3-dimethyl-1,3-diborapentafulven mit HBEt2 bzw. Mo(CO)6 zur Reaktion gebracht, erhält man das erwartete …
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Relaxation Properties of a Dual Labeled Boron and Gadolinium Agent, Gd(III)- Diethylenetriaminepentaacetate-carborane
Made available in DSpace on 2017-07-06T18:59:04Z (GMT). No. of bitstreams: 3 Tatham_Alicia_T_MS.pdf: 34121853 bytes, checksum: 46bed3bce692549cefb1e49ab1643d84 (MD5) Tatham_Alicia_T_MS_ABS.pdf: 979632 bytes, checksum: c89af05a29d395ad19688668124cea35 (MD5) license.txt: 4813 bytes, checksum: …
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The synthesis, characterization, and application of carborane-cluster based macrocycles and boron nitride nanosheets in photovoltaics
… appear to have been studied. By incorporating carborane cluster-based macrocyclic compounds as "electron reservoirs," a number of the inherent limitations in DSSC systems can be potentially circumvented, including extending the useable photon energy into the IR region by using a multi-photon, …
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Plasma-enhanced molecular layer deposition (PEMLD) of boron carbide dielectrics from carboranes for interconnect and patterning applications
… (PEMLD) process for boron carbide from carboranes. This novel method will allow for the deposition of thin films of boron carbide with molecular-level control. Boron carbide, which lies outside the silicon class of materials, has appealing chemical, mechanical, electrical, dielectric, …
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Synthesis towards Polyhedral and Rigid Organic Non-Linear Optic Materials
… research has shown that both polyhedral carborane compounds and sterically constrained hydrindacene show great potential as NLO compounds. Their calculated values exceed those of compounds currently in use. Initial synthetic obstacles in the formation of polyhedral carborane based …
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Boron ligand design and reactivity in metal complexes.
… and their interplay with transition metals and carborane clusters, with an emphasis on uncovering fundamental bonding modes and divergent reaction pathways. The first portion examines hydroboration chemistry beyond conventional catalysis, highlighting the unique outcomes observed with metal …
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Electronic Structure of Three Center Two Electron Bonds in Boron Rich Materials: A Study of Molecules, Crystals, and Amorphous Solids using the ab initio Orthogonalized Linear Combination of Atomic Orbitals Method
It has been shown that isomers of carborane, α and β rhombohedral boron, α and β tetragonal boron, γ boron, and boron carbide tend to form icosahedral structures. If the icosahedra were formed with pure boron, it has been demonstrated that there is an insufficient number of electrons to populate …
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Functionalized nido-C4B2, closo-C2B5 and -C2B10 Carboranes, and Reactivity Studies on Electron-Poor 2,3-Dihydro-1,3-diborolyl Complexes of Ruthenium
The dissertation describes work on organoborane/carborane compounds (Chapters 3.1, 3.2, 3.3, 3.5), on the reactivity of 2,3-dihydro-1,3-diborolyl complexes of ruthenium (3.4), and on aminoborane derivatives (3.6). In Chapter 3.1, a one-pot synthesis of …
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Synthese und Charakterisierung neuer bor- und siliziumreicher Strukturen für Anwendungen in der Elektronenmikroskopie und in der Bor-Neutroneneinfangtherapie
… borreiche Verbindungen bildete die Gruppe der Carborane. Ausgehend von Hydroxymethyl- und von Acetylfuranen konnten kleine Moleküle gewonnen werden, die bis zu 30 Boratome (je zehn in drei Carboraneinheiten) enthielten. Von diesen Furanen wurden Diels-Alder-Addukte (Modellreaktion mit …
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Novel Organometallic Mixed Valence Complexes
… containing a bis(ethynyl) substituted para-carborane bridging moiety were synthesised (Chapter four) together with the monometallic complex Mo(C≡CC2B10H11)(dppe)(η7-C7H7). The mono-metallic complex was first synthesised and studied to establish how the ethynyl carborane affects the …
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Surface studies of organic thin films using scanning probe microscopy and nanofabrication
… to the substrate. For this dissertation, cobaltcarborane porphyrins were synthesized using a ring-opening zwitterionic reaction to produce isomers with different numbers of carborane clusters per macrocycle. Particle lithography was used to prepare regular arrangements of well-defined …
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Synthesis, Characterization, and Evaluation of Novel BODIPY Dyes With Theranostic Applications
… an effective method towards the preparation of carborane-appended BODIPYs for boron neutron capture therapy. The use of highly efficient palladium-catalyzed Suzuki coupling yielded two carboranyl-BODIPYs of varying optical properties in good yield. The photophysical properties and blood brain …
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The Bulk and Interfacial Electronic and Chemical Structure of Amorphous Hydrogenated Boron Carbide
… chemical vapor deposition (PECVD) of ortho-carborane (1,2-C2B10H12). Experimental methods used include: x-ray and ultraviolet photoelectron spectroscopies (XPS/UPS) and x-ray absorption/emission spectroscopies (XAS/XES). These methods were used to investigate the chemical species, bonding …
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Amorphous hydrogenated boron carbide for solid-state direct-conversion thermal neutron detection
… series’ of a-BC:H thin films using an ortho-carborane precursor with varying PECVD process parameters, including substrate temperature, RF power, process pressure, carrier gas flow rate, and partial precursor flow. Films grown using higher substrate temperature and higher RF power …
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Crystallographic studies of interactions between ligands and DNA oligonucleotides
… outside. Section B describes the structure of a carborane-containing ligand (JW-B) bound to the minor groove of d(CGCAAATTTGCG)2. The analysis shows that is possible to position boron-rich moieties close to the cell nucleus, and JW-B may have potential in Boron Neutron Capture Therapy.
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