Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1309 for “"Transition Metal"”.
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Cyanoscorpionates and Transition Metal Complexes.
… structurally characterized by X-ray diffraction. Transition metal complexes of the ligand are currently under investigation.</p>
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Catalysis by transition metal compounds
… from this study should be applicable to other transition metal compounds."
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Transition metal bis(porphyrin) complexes
Metal bis(porphyrin) complexes M(porph)$\sb2$ have received much attention in the last ten years due to their electronic and structural similarities to the Special Pair in photosynthetic bacteria. The work presented here covers the first transition metal bis(porphyrin) complexes. In addition, the …
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Transition metal complexes of tetracyclines
Forty-one transition metals were studied to observe their complexing properties with the tetracyclines. Four metals were found to form sufficiently strong complexes with the tetracyclines to provide a basis for a rapid, reliable method of assaying the potency of the tetracycline products used in …
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Novel Transition-Metal Oxides Under Pressure
Transition-metal oxides have been the focus of multiple experimental and theoretical research efforts because of their versatility and applicability to new technology. These characteristics mostly owe to our ability to adjust valence states and crystal fields, among others, by fine-tuning …
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Novel Studies of Transition Metal Dimers
Made available in DSpace on 2014-12-13T20:10:01Z (GMT). No. of bitstreams: 1 7709156.pdf: 3248432 bytes, checksum: cb0109370ed3218bfd193fa489d34724 (MD5) Previous issue date: 1976
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Transition metal complexes of pentadentate ligands
… some insight as to the behavior and role of the metal ion as it interacts with the five-donor atoms and hence an insight into the role of the metal ion in Vitamin B₁₂. [See Figure I] Compounds formed by the reaction of Ni(XSAL)₂·2H₂0 with 1,5-diamino-3-azaheptane, DlEN, and Ni(OAc)₂·4H₂O with …
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Studies on polygermanyl-transition metal (carbonyl) derivatives
… between the appropriate polygermanyl halides and metal carbonyl anions. The characterisation by infrared, Raman, n.m.r. and mass spectrometry of these compounds is discussed in detail. The physical properties and reactions have also been investigated and compared, in parallel with the parent …
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Germanium hydride derivatives of transition metal carbonyls
Compounds of the type Fe(CO)₄(GeR₃)₂ containing two different methylgermyl substituents have been prepared and characterised. The preparation was via the exchange reaction Fe(CO)₄(GeR₃)₂ + [Mn(CO)₅]⁻ → [Fe(CO)₄(GeR₃)]⁻ + Mn(CO)₅(GeR₃) [Fe(CO)₄(GeR₃)]⁻ + GeXR’₃ → Fe(CO)₄(GeR₃)(GeR’₃) The compounds …
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Structural studies of layered transition metal oxides
A number of transition metal oxide materials, both new and previously reported, have been<br/>synthesised, their structures based on the n = 2 Ruddlesden-Popper layered perovskites. Their<br/>structures were determined through Rietveld refinement against X-ray and neutron powder<br/>diffraction, …
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MULTIPHOTON ABSORPTION IN MONOLAYER TRANSITION METAL DICHALCOGENIDES
… to calculate 2PA spectra of other monolayer transition metal dichalcogenides and it reveals the intrinsic nature of 2PA process by comparing the calculated α2-values with experimental data. Our finding lays theoretical foundation and provides experimental evidence for developing sensitive …
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Synthetic Applications of Polar Transition Metal Metallocenes
… structure of ferrocene was elucidated in 1952, metallocenes have generated a vast amount of interest. Transition metal metallocenes have previously been shown to be suitable precursors in the syntheses of novel organometallic and metallo-organic complexes, although the use of metal halide …
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Electrochromism of Transition Metal Phthalocyanine Thin Films
Thin films (500-4500 (ANGSTROM) thick) of Fe(II), Co(II), Ni(II), and Cu(II), and Zn(II) phthalocyanines on gold or indium oxide electrodes undergo stoichiometric oxidation and rereduction. Excepting FePc and CoPc, the process is essentially reversible. Chronocoulometry showed that ZnPc films …
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Early Transition Metal Alkyl and Tetrahydroborate Complexes
An investigation of early transition metal alkyl and tetrahydroborate complexes as catalytic models and ceramic precursors has been initiated. The compounds MX$\sb2$ (dmpe)$\sb2$, dmpe = 1,2-bis(dimethylphosphino)ethane, for M = Ti, V, Cr, and X = Br, I, BH$\sb4$, have been prepared. These …
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Exafs Studies of Transition Metal Exchanged Zeolites
The extended X-ray absorption fine structure (EXAFS) that appears on the high energy side of the absorption edge of an element has been shown to be due to modifications to the final state wave function of the ejected photoelectron from the absorbing atom by its near neighbors.('1,2,3) Consequently, …
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Studies of Polynuclear Transition-Metal Ion Complexes
Made available in DSpace on 2014-12-10T23:01:54Z (GMT). No. of bitstreams: 1 7500299.pdf: 3666607 bytes, checksum: 25375e268a45b108fbcbcd10df194fa0 (MD5) Previous issue date: 1974
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