387 Result(s)
within
Physical Chemistry
**ao-**a Jiang
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Article
Crystal structures and spectroscopic properties of copper(II) and zinc(II) complexes with the macrocycle 1,4,7-tris(2-pyridylmethyl)-1,4,7-triazacyclononane
Two novel transition-metal copper and zinc complexes [(CuL)2]·(ClO4) (1) and [(ZnL)]·(ClO4)2 (2) (L = 1,4,7-tris(2-pyridylmethyl)-1,4,7-triazacyclononane) have been synthesized and structurally determined. The tw...
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Article
Molecular and Supramolecular Structures of a Nickel(II)–Copper(II)–Nickel(II) Trinuclear Complex Containing a New Macrocyclic Oxamido Complex Ligand
The title complex, [Cu(NiL)2(H2O)2](ClO4)2, has been obtained by self-assembly, where [NiL] is a new macrocyclic oxamido complex ligand. In the crystal, a new kind of supramolecular interaction between the carbon...
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Article
Catalytic combustion of methane on novel catalysts derived from Cu-Mg/Al-hydrotalcites
Novel Cu-Mg/Al mixed oxides (designated as i-CMAO-800) were prepared by calcinations of Cu-Mg/Al hydrotalcites [(Cu2+ +Mg2+)/Al3+= 3] at 800 °C. Their performance for the catalytic combustion of methane was inves...
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Article
Synthesis and Characterization of Transition Metal Methanesulfonates and their Catalytic Behavior in Biginelli Reactions
A series of transition metal methanesulfonates were prepared and characterized by FTIR and TG. Characteristic peaks for the methyl and sulfonyl groups were observed in the i.r. spectra. The number of crystal w...
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Article
Structure-activity relationships for a new family of sulfonylurea herbicides
Acetohydroxyacid synthase (AHAS; EC 2.2.1.6) catalyzes the first common step in branched-chain amino acid biosynthesis. The enzyme is inhibited by several chemical classes of compounds and this inhibition is t...
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Article
Unclassical hydrogen bonds of C—H⋅sO and C—H⋅sN in the crystals of 2-amino-3-cyano-4-(3,4-dichlorophenyl)-5-oxo-1,4,5,6-tetrahydro-4H-pyrano[2,3-d]pyrimidine
The 2-amino-3-cyano-4-(3,4-dichlorophenyl)-5-oxo-1,4,5,6-tetrahydro-4H-pyrano[2,3-d] pyrimidine (1, C17H15Cl2N5O3) was synthesized and characterized by IR,1H NMR and elemental analysis. The molecular structure of
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Article
Critical Content of MgO in Spheroidisers
Magnesium oxide in spheroidiser is harmful to the production of ductile iron for decreasing active magnesium content. To obtain quality ductile iron, the effects of magnesium oxide content in spheroidisers on ...
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Article
Study and Application of Heat Treatment of Multi-Element Wear-Resistant Low-Alloy Steel
The effects of heat treatment on the properties of multi-element wear-resistant low-alloy steel (MLAWS) which is used to make the liner of rolling mill torus were researched. The results show that when quenchi...
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Article
Synthesis, crystal structure and spectroscopic properties of two new complexes containing azido or dicyanamido bridges
Two new complexes, [Cu(L1){N(CN)2}]·ClO4 (1) (L1 is 1,8-dimethyl-1,3,6,8,10,13-hexa-azacyclotetradecane) and [Co(L2)(N3)2]·ClO4 (2) (L2 is 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane) have been s...
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Article
Effects of Mineral Composition and Microstructure on Crack Resistance of Sintered Ore
Vickers indentation test was used to study the effects of mineral composition and microstructure on crack resistance of sintered ore, and the initiation and propagation of cracks in different minerals containe...
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Article
Effect of Alloying Elements on Thermal Wear of Cast Hot-Forging Die Steels
The effect of main alloying elements on thermal wear of cast hot-forging die steels was studied. The wear mechanism was discussed. The results show that alloying elements have significant influences on the the...
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Article
Transition temperatures of the trapped ideal spinor Bose gas
The thermodynamic properties of the trapped ideal spinor Bose gas are studied in details with the constraints of fixed total number of atoms N, and magnetization M. The double transition temperatures, their c...
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Article
The hydrogen bonding in 2-amino-3-cyano-4-(3-nitrophenyl)-4,6-dihydro-5H-pyrano[3,2-c]quinolin-5-one N,N-dimethylformamide solvate monohydrate
The crystal structure of 2-amino-3-cyano-4,6-dihydro-4-(3-nitrophenyl)-5H-pyrano[3,2-c]quinolin-5-one N,N-dimethylformamide solvate monohydrate is determined by room temperature X-ray diffraction. The title compo...
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Article
PVP-capped twinned gold plates from nanometer to micrometer
PVP (poly(vinyl pyrrolidone))-capped micrometer-sized twinned gold (Au) plates with the shape of hexagon or triangle have been successfully synthesized in a large quantity by reducing hydrogen tetrachloroauric...
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Article
Development of Glass Ceramics Made From Ferrous Tailings and Slag in China
A great amount of ferrous tailings and slag cause severe damage to the ecological environment, which must be reclaimed and utilized. The composition, type, and characteristics of ferrous tailings and slag in C...
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Article
High Nitrogen Austenitic Stainless Steels Manufactured by Nitrogen Gas Alloying and Adding Nitrided Ferroalloys
A simple and feasible method for the production of high nitrogen austenitic stainless steels involves nitrogen gas alloying and adding nitrided ferroalloys under normal atmospheric conditions. Alloying by nitr...
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Article
Perturbation Solutions for Thermal Process of Honeycomb Regenerator
A parameter perturbation for the unsteady-state heat-transfer characteristics of honeycomb regenerator is presented. It is limited to the cases where the storage matrix has a small wall thickness so that no te...
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Article
High Efficient Technology of Steelmaking With Low Silicon Hot Metal on Large Converter
To resolve the difficulty in slag formation during steelmaking with low silicon hot metal and to increase productivity, a new 5-hole lance was developed by increasing oxygen flow from 50 000 m3/h to 60 000 m3/h. ...
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Article
Synthesis, characterization and crystal structure of 6-ferrocenyl-2,4-dihydroxy-2,4-di(pyridine-2-yl) cyclohexanecarbonyl ferrocene
A novel ferrocene derivative which has four stereo centers has been prepared by an efficient synthetic method based on a solvent-free reaction. The compound was characterized by IR, 1H-NMR, 13C-NMR, ESI-MS, singl...
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Article
Effects of AlMnCa and AlMnFe Alloys on Deoxidization of Low Carbon and Low Silicon Aluminum Killed Steels
To confirm the effects of AlMnCa and AlMnFe alloys on the deoxidization and modification of Al2O3 inclusions, experiments of 4-heat low carbon and low silicon aluminum killed steels deoxidized by AlMnCa and AlMnF...
