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Showing 1 to 20 of 85 for “"Tellurium"”.
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Decay of Tellurium-121 and Tellurium-123 Isomers
Made available in DSpace on 2015-05-12T17:11:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0001396.PDF: 2192799 bytes, checksum: cf344daf8bbce2a8da9cbd121ea8d115 (MD5) Previous issue date: 1949
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Mechanistic Studies in Tellurium Chemistry
The reduction of p-ethoxyphenyltellurium trichloride by sodium sulphite and metabisulphite has been investigated. The reactions have stoichiometries of one mol of p-EtOPhTeCl₃ to 1.5 and 0.75 mol of SO₃²⁻ and S₂O5²⁻ respectively. The paths of the reaction mechanisms with both reducing agents are …
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Structural Studies in Tellurium Chemistry
… was the characterisation of new and novel organo-tellurium complexes, using the technique of single crystal X-ray analysis to establish more firmly the various coordination modes of tellurium. In each study the unit cell dimensions and intensity data were collected using an Enraf-Nonius CAD-4, …
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Chemistry of tellurium applied to rubber
A study of tellurium and its compounds in rubber has been carried out by using them as cross linking agents and as ultra-accelerating agents when employed together with a tetraalkylthiuram disulphide. Reactions of tellurium tetrahalides with model alkenes, rubber solutions and solid rubber were …
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Stereoisomerization of Hexacoordinate Sulfur and Tellurium
The reaction of bromine trifluoride with sulfurane 1 gives rise to the first reported isolation of geometrical isomers of 12-S-6 sulfur, the trans- and cis-persulfuranes 2 and 3. The cis isomer is 2.0 (+OR-) 0.1 kcal/mol more favored in free energy than the all trans isomer in methylene chloride …
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Synthesis and Physical Investigation of Tellurium Dithiocarbamates
A range of tellurium dithiocarbamates [Te(S2CNR2)2 and Te(S2CNR2)4 J were synthesised and used to study their ligand exchange reactions. The photo-reaction of solutions of these compounds with dioxygen was investigated. The tetrakis(dialkyldithiocarbamato) tellurium(IV) [Te(dtc)4] was found to be a …
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An Evaluation of Tellurium Compounds as Polymer Stabilisers
Some new organotellurium compounds were synthesised and their ability to act as stabilisers for poly (vinyl chloride) (PVC) and polypropylene (PP) assessed. Molecular weight measurements and mass spectra data indicate that diphenyl tellurium maleate and diary tellurium β-mercaptopropionate exist as …
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Synthetic Approaches to Organaylselenium and Tellurium Semi-Conductors
A range of organotellurium and -selenium(II) compounds were used as donors with some electron acceptors to form donor-acceptor complexes. 7,7,8,8-Tetracyano-p-quinodimethane (TCNQ), Chloranil (TCQ) and pdinitrobenzene (DNB) were chosen as acceptors. Solid state conductivity measurements have been …
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Synthesis and Stability Studies of Novel Tellurium(IV) Compounds
… silver, titanium, copper, cobalt. Surprisingly, Tellurium-based compounds never attracted the curiosity of the scientific community and tellurium chemistry with relevance to biological systems is poorly developed. Only recently, two Tellurium containing species have been investigated in clinical …
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A Study of some Complexes of Thallium and Tellurium
… possible assignments are suggested. The organotellurium compounds with the formula R,Te and Rolex, (where R = phenyl, o-tolyl, p-tolyl ,p-methoxyphenyl, p-ethoxypheny] and X = Cl, Br and I) were prepared. Some new compounds such as the di (perf luoropheny1) tellurium dihalides and …
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Tellurium, antimony, and selenium isotopes as indicators of elemental mobility
… waters. Other isotope systems, like that of tellurium (Te) and antimony (Sb) have yet to be explored in depth and could provide information about biogeochemical processes that control their mobility in modern and ancient environments. The work presented here seeks to improve our understanding …
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Search for Baryon Number Violation in Tellurium-130 with CUORE
CUORE is one of the world-leading experiments to search for neutrinoless double beta decay. The excellent energy resolution and the stability of the detectors at CUORE also allow for other rare event searches. This thesis describes an experimental analysis undertaken to search for baryon number …
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Characterization of tellurium back contact layer for CdTe thin film devices
… a main source of CdTe performance limitations. Tellurium (Te) applied as a back contact has led to significant increases in fill factor and an overall progress in device efficiency. Devices deposited with Te show significant improvement in uniformity, even without intentional Cu doping, when …
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Reactions of directly related tellurium and selenium heterocycic compunds with triiron dodecacarbonyl
The reactions of directly related tellurium and selenium heterocyclic compounds with triiron dodecacarbonyl are described. The reaction of 2-telluraphthalide, C8H8OTe with [Fe3(CO)12 gave [Fe{C6H4(CH2)Te}(CO)3]2, (1). An iron atom has inserted into the telluracyclic ring, and it is probable that …
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Stripping Voltammetry of Tellurium (IV) In 0.1M HC10 4 at Rotating Gold Disk Electrodes.
The stripping voltammetry of Tellurium (IV) in 0.1M HC10, using gold electrodes is described. Detection limits for solid gold, in situ gold-plated and externally gold-plated rotating glassy carbon disk electrodes are presented. No significant increase in sensitivity is reported for the use of solid …
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