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Showing 1 to 6 of 6 for “"Co substitution"”.
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Interlayer optical response of yttrium barium (copper (cobalt, zinc)) oxide
We report optical reflectance and spectroscopic ellipsometry measurements of the in- and out-of-plane dielectric responses of chain substituted $\rm YBa\sb2Cu\sb3O\sb{6 + x}$ and $\rm YBa\sb2(Cu\sb{1 - y}Co\sb{y})\sb3O\sb{6 + x}$ and of plane substituted $\rm YBa\sb2(Cu\sb{1 - y}Zn\sb{y})\sb3O\sb{6 …
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Structure Design and Luminescence Control of Eu⁺²-doped Orthorhombic Phosphors for Solid-State Lighting Applications
… affecting the performance of phosphor-converted white light emitting diodes (pc-WLEDs). This work focuses on the exploration of novel phosphors used for high-performance WLED, using orthorhombic host materials as the structural prototype. The major findings from this thesis can be …
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Layered perovskites as cathode materials for IT-SOFC
… The structural and phase stability has been confirmed up to 800 °C by High temperature XRD studies. The coefficient of thermal expansion (CTE) and oxygen content decrease with decreasing size of the Ln³+ ions from Ln = Sm to Gd. While the decrease in CTE is due to the increasing co-valence of …
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Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity.
The reaction between the tetrahedrane cluster RCCo3(CO)9{R = CHO (1), H (3)} and the redox-active diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3- dione (bpcd) leads to the replacement of two CO groups and formation of RCCo3(CO)7(bpcd) {R = CHO (2), H (4)}. Clusters 2 and 4 are …
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Synthesis and characterisation of Aurivillius phase materials
… arise from fundamentally different conditions, where ferroelectricity requires ions with empty orbitals to accept electron density donation and ferromagnetism requires partially filled orbitals to allow unpaired electrons to align to give net spin. It is therefore necessary to have …
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Synthetic models of [FeFe]-hydrogenase: case studies utilizing azadithiolate and nitrosyl coligands
… are enzymes that catalyze the reversible interconversion of protons, electrons, and dihydrogen (2H+ + 2e− <-> H2). Because of the potential utility of H2 as an energy carrier, the detailed understanding of hydrogenases has received considerable attention and funding. In particular, hydrogenases …