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Cerium Oxide (CeO2): Synthesis, Properties and Applications provides an updated and comprehensive account of the research in the field of cerium oxide based materials. The book is divided into three main blocks that deal with its properties, synthesis and applications. Special attention is devoted to the growing number of applications of ceria based materials, including their usage in industrial and environmental catalysis and photocatalysis, energy production and storage, sensors, cosmetics, radioprotection, glass technology, pigments, stainless steel and toxicology. A brief historical introduction gives users background, and a final chapter addresses future perspectives and outlooks to stimulate future research. The book is intended for a wide audience, including students, academics and industrial researchers working in materials science, chemistry and physics. Addresses a wide range of applications of ceria-based materials, including catalysis, energy production and storage, sensors, cosmetics and toxicology Provides the fundamentals of ceria-based materials, including synthesis methods, materials properties, toxicology and surface chemistry Includes nanostructured ceria-based materials and a discussion of future prospects and outlooks
The present work deals with the preparation and characterization of ten new coordination polymers prepared from different metal ions and ligands by different synthetic methods. In addition to the structural characterization of these compounds by means of X-ray singlecrystal diffraction data, the focus is on the consideration of thermal and spectroscopic properties. The new silver coordination polymer exhibits very unique, robust and interesting polymeric structure with high thermal stability. Two new lanthanide coordination polymers (neodymium and samarium) have been synthesized with H2FDA = 2,5-furandicarboxylic acid in DMF as solvent via capped tube method. The compounds are iso-structural and exhibit threedimensional coordination polymers. The goal of using DMF as pure solvent instead of mixture of water and other solvents was to synthesize new coordination polymer which might show very intensive luminescence effect. The investigation has turned out that these compounds emerge no significant luminescence effect. As it has been reported in previous works in which the H2FDA = 2,5-furandicarboxylic acid was used for construction of lanthanide coordination polymers in water as solvent, however the compounds have exposed very interesting luminescence properties [229-230]. A new cerium coordination polymer has been produced with ligand (H2pdc = 3,5-pyrazoledicarboxylic acid) under solvothermal condition in DMF as solvent. Indeed, ligand (H2pdc = 3,5-pyrazoledicarboxylic acid) is very versatile to construct coordination network by various coordination modes. Three copper (I) coordination polymers have been successfully synthesized via solvent diffusion technique in test tube. The compounds all display 1D polymeric structure with rather similar coordination environment around metal ions. Moreover, they are very stable against temperature rising. The compounds [Pb3(CH3COO)2(N3)4]n and [Na2Pb2(CH3COO)6]n were synthesized under same synthesis conditions and starting materials but with different metal salt and ligand ratios. Interestingly, the both products show three-dimentional frameworks, however they expose different coordination structures. Actually, the investigation shows that the changing metal salt and ligand ratio can result in the formation different structures of coordination networks, although they have been produced under same reaction conditions. Compound [Pb(DHBDA)]n has been made with ligand 2,5-Dihydroxy-1,4-benzenediacetic acid which has been reported in very few works for constructing coordination compounds.
In this study, by applying a salt metathesis approach between Ce(OtBu3)2(NO3)2(THF)2 and the potassium salts of mono- and ditrimethylsilyl substituted cyclopentadienes, we were able to isolate two new Ce(IV) metallocenes, including to the best of our knowledge, the first structurally characterized bis-cyclopentadiene Ce(IV) compound.
ABSTRACT: Polynuclear discrete clusters incorporating transition metals have been attracting a great deal of attention, due to their aesthetically pleasing chemical structures, as well as the fascinating magnetic properties they often possess. In particular, many of these clusters exhibit singlemolecule magnetism (SMM) behavior, a property which is intrinsic to the individual molecules, and makes them capable of functioning as nanoscale magnetic particles. Inorganic chemical research has been also directed towards the synthesis of high oxidation-state molecular compounds, such as mixed-3d, 3d/4f, and, 3d/5f clusters. Such complexes provide a wide range of applications in diverse areas involving inorganic, organic, environmental, and industrial chemistry; i.e. Mn[superscript IV] and Ce[superscript IV] oxides are effective catalysts for the conversion of nitric oxide to N2 and O2. In search for new mixed-metal SMMs, and effective catalysts for the NOx conversion process, mixed Mn-Ce compounds were judged to be worth exploring. Keeping all this in mind, a series of mixed metal Mn-Ce molecular clusters were synthesized and characterized, including two new hexa- and decanuclear Mn/Ce molecular cages with many novel structural features.