Materials Literature
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In the title coordination polymer, [Cu(C(2)O(4))(C(12)H(8)N(2))](n), the Cu(II) atom is six-coordinated by four O atoms from two oxalate ligands and two N atoms from one 1,10-phenanthroline (phen) ligand in a distorted octa-hedral coordination geometry. The oxalate anions act as bis-bidentate ligands, bridging the Cu-…
In the title mol-ecule, [Cu(C(8)H(7)O(2)S)(2)(C(5)H(5)N)(2)(H(2)O)], the Cu(II) ion is penta-coordinated in a distorted square-pyramidal geometry by two O atoms of two 4-(methyl-sulfan-yl)benzoate anions and two N atoms of two pyridine ligands and a water O atom situated at the apical site. In the crystal structure, O…
采用循环伏安法和碳糊电极,考察了用共缩合法和二次嫁接法合成的多金属氧酸盐（POM）/SBA-15介孔杂化材料的电化学性质以及氧化还原性能.在乙腈介质和所检测的电势范围内,溶液中游离的PW1 1 Si 32-物种和浸渍负载于介孔氧化硅上的同样POM物种显示两对WVI单电子氧化还原峰;共价键联于介孔氧化硅上的PW1 1 Si 32-物种也显示两对峰,但第一对峰的峰电流增大,还原电位比浸渍样品正移,表明共价键联的POM不仅能够保持其原有的氧化还原性能,而且比浸渍负载的POM具有更强的氧化性.峰流～扫速的关系显示,在低扫速时,样品的氧化还原过程是表面控制的;在高扫速时,则是扩散控制的.另外,钨磷酸盐样品的氧化性大于钨硅酸盐样品;共缩合法和…
Here, we present a de Haas-van Alphen (dHvA) effect1 study on the newly discovered LaFeAsO1-xFx compounds2,3 in order to unveil the topography of the Fermi surface associated with their antiferromagnetic and superconducting phases, which is essential for understanding their magnetism, pairing symmetry and superconduct…
This chapter contains sections titled: Introduction Theory of Phase Formation and Growth in the Diffusion Zone at interdiffusion in an External Electric Field Effects of Electromigration on Compound Growth at the Interfaces Reactive Diffusion in a Binary System at an Imposed Electric Current at Nonequilibrium Vacancie…
This chapter contains sections titled: Introduction Physics of Small Particles and Dispersed Systems Phase Transformations in Nanosystems Diagram Method of Phase Transition Analysis in Nanosystems Competitive Nucleation and Growth of Two Intermediate Phases: Binary Systems Phase Diagram Versus Diagram of Solubility: W…
This chapter contains sections titled: Introduction Grain Growth and Ripening: Fundamentals Alternative Derivation of the Asymptotic Solution of the LSW Theory Flux-Driven Ripening at Reactive Diffusion Flux-Driven Grain Growth in Thin Films during Deposition Flux-Induced Instability and Bifurcations of Kirkendall Pla…
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High level radioactive wastes are being vitrified at the Savannah River Site for long term disposal. Many of the wastes contain sulfate at concentrations that can be difficult to retain in borosilicate glass. This study involves efforts to optimize the composition of a glass frit for combination with the waste to impr…
Abstract In this reaction, air and naphthalene produce phthalic anhydride as the only product, an efficient way of carrying out chemical reactions, which has directed inventions of other oxidation of aromatic compounds, such as the production of anthraquinone from anthracene, and phenanthraquinone from phenanthrene. T…
Abstract The reaction between a nitrile and zinc reagent from an α‐bromoester (i.e., the Reformatsky reagent) to give an enamino ester or the further product of a β‐keto ester upon acidic hydrolysis, is generally referred to as Blaise reaction. It is a one‐step synthesis of higher aliphatic β‐keto esters from a stable…
Abstract The synthesis of furan derivatives by treatment of an α‐halo ketone and β‐dicarbonyl compound with a base is known as the Feist‐Bénary condensation. The bases used are normally ammonia and pyridine, however, it was found advantageous to use aqueous pyridine to effect this reaction instead of ammonia, because…
This chapter contains sections titled: Introduction First Phase Nucleation Delay in AlCo Thin Films Kinetics of Lateral Growth of Intermediate Phase Islands at the Initial Stage of Reactive Diffusion MC-Scheme of Reactive Diffusion References Further Reading
This chapter contains sections titled: Introduction Standard Model and the Anomaly Problem Criteria of Phase Growth and Suppression: Approximation of Unlimited Nucleation Incubation Time Should We Rely Upon the Ingenuity of Nature? Nucleation Problems and Meta-Quasi-Equilibrium Concept Suppression of an Intermediate P…
Abstract The unimolecular thermal cleavage of esters that hold β‐hydrogen(s) on the alcoholic moiety via cis‐elimination to form olefins without a carbon skeleton isomerization or double bond shift is known as ester pyrolysis. The carboxylic acids are the by‐products in this reaction. This reaction is suitable for est…
Abstract Synthesis of α‐substituted acetic acid esters or substituted acetones from acetoacetic ester by treatment of ethyl acetoacetate with a strong base, followed by alkylation and subsequent deacetylation or decarboxylation is known as acetoacetic ester synthesis. The α‐methylene proton is readily deprotonated, an…
Abstract Hydrogen cyanide is manufactured from methane, ammonia, and oxygen over a catalyst of 90% Pt–10% Rh in the form of a pad of woven screens at 1050–1100°C and 2 atm. This reaction has a wide application in industrial synthesis of hydrogen cyanide. This reaction is known as Andrussow process where catalytic gauz…
Abstract The synthesis of oxazole derivatives by treatment of equimolar amounts of aldehyde cyanohydrin and aromatic aldehyde in anhydrous ether with dry hydrochloride is known as the Fischer oxazole synthesis or Fischer synthesis. This method is found suitable for the preparation of 2,5‐diaryloxazoles. Some minor byp…
The orthoferrites RFeO3 where R is a rare earth and related compounds are being studied because of their important technological applications and unusual magnetic and electrical properties. \nSome of these compounds are of interest because of their ferroelectric behaviour as well as for their semiconducting properties…
This chapter contains sections titled: Introduction Background Review of RFID Systems at 5.8 GHZ Conventional Power Divider Design Approach and Working Principle: Analogy with Flow of Water Design of the Power Divider Theory and Circuit Configuration Results for the Performance of the Eight-Way Power Divider Variation…