Synthesis of 4—Aryl—3,4—dihydropyrimidinones Using Microwaveassisted Solventless Biginelli Reaction

Ｉｎｔｒｏｄｕｃｔｉｏｎ4 Ａｒｙｌ 3,4 ｄｉｈｙｄｒｏｐｙｒｉｍｉｄｉｎｏｎｅｓ (4)ａｓａｃｏｒｅｗｅｒｅｏｂｓｅｒｖｅｄｉｎｓｏｍｅｂｉｏｌｏｇｉｃａｌｌｙｉｍｐｏｒｔａｎｔｃｏｍｐｏｕｎｄｓ .1Ｍｏｒｅｒｅｃｅｎｔｌｙ ,ｄｉｈｙｄｒｏｐｙｒｉｍｉｄｉｎｏｎｅｓａｒｅｓｈｏｗｎｔｏｂｅａｕｓｅｆｕｌｔｏｏｌｆｏｒｓｔｕｄｙｉｎｇｄｙｎａｍｉｃｃｅｌｌｕｌａｒｐｒｏｃｅｓｓａｎｄｃａｎｂｅｃｏｎｓｉｄｅｒｅｄａｓａｎｅｗｌｅａｄｆｏｒｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆａｎｔｉ ｃａｎｃｅｒｄｒｕｇ…     

Electrochemical Polymerization of Brilliant Cresyl Blue and Properties of the Polymer

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｉｓｃｏｖｅｒｙｏｆｔｈｅｃｏｎｄｕｃｔｉｖｉｔｙｏｆｐｏｌｙａｃｅｔｙｌｅｎｅｈａｓｏｐｅｎｅｄａｎｅｗｒｅｓｅａｒｃｈｆｉｅｌｄｆｏｒｔｈｅｓｙｎｔｈｅｓｉｓｏｆｎｅｗｍａｔｅｒｉａｌｓ .Ｃｏｎｄｕｃｔｉｎｇｐｏｌｙｍｅｒｓｃａｎｂｅｓｙｎｔｈｅｓｉｚｅｄｂｙｔｈｅｃｈｅｍｉｃａｌｐｏｌｙｍｅｒｉｚａｔｉｏｎａｎｄｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｏｌｙｍｅｒｉｚａ ｔｉｏｎ .1 7Ｔｈｅｅｌｅｃｔｒｏｃｈｅｍｉｃａｌｐｏｌｙｍｅｒｉｚａｔｉｏｎｐｒｏｖｉｄｅｓａｓ…     

Preparation, Characterization of Solid SolutionLa_4BaCu_(5- x)Mn_xO_(13 λ)(x= 0—5) and ItsCatalytic Activity in the Reduction of NO by CO

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｉｓｃｏｖｅｒｙｏｆｔｈｅｓｕｐｅｒｃｏｎｄｕｃｔｉｖｉｔｙｏｆｔｈｅＢａ－Ｌａ－Ｃｕ－Ｏｓｙｓｔｅｍａｔｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｓｈａｓｇｒｅａｔｌｙｓｔｉｍｕｌａｔｅｄｔｈｅｉｎｖｅｓｔｉｇａｔｉｏｎｏｆｃｕｐｒａｔｅｓ［１］．Ｃｕｐｒａｔｅｓｈａｖｅｂｅｅｎｆｏｕｎｄｔｏｂｅａｃｔｉｖｅｃａｔａｌｙｓｔｓｆｏｒｓｅｖｅｒａｌｒｅａｃｔｉｏｎｓ，ｉｎｃｌｕｄｉｎｇｔｈｅｒｅｄｕｃｔｉｏｎａｎｄｄｅｃｏｍｐｏｓｉｔｉｏｎｏｆＮ２Ｏ，ＮＯａｎｄＮＯ２，ｔｈｅ…     

Synthesis and Structure of 4—Nitrobenzaldehyde Thiosemicarbazone

ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒｅｏｆ４－ＮｉｔｒｏｂｅｎｚａｌｄｅｈｙｄｅＴｈｉｏｓｅｍｉｃａｒｂａｚｏｎｅＴｉａｎＹｕ－Ｐｅｎｇ；ＤｕａｎＣｈｕｎ－Ｙｉｎｇ；ＬｕＺｈｏｎｇ－Ｌｉｎ；ＹｏｕＸｉａｏ－Ｚｅｎｇ（ＣｏｏｒｄｉｎａｔｉｏｎＣｈｅ...     

Researches into the Proton Conductivity of Molybdovanadophosphoric Acids with Wells－Dawson Structure

ＲｅｓｅａｒｃｈｅｓｉｎｔｏｔｈｅＰｒｏｔｏｎＣｏｎｄｕｃｔｉｖｉｔｙｏｆＭｏｌｙｂｄｏｖａｎａｄｏｐｈｏｓｐｈｏｒｉｃＡｃｉｄｓｗｉｔｈＷｅｌｌｓ－ＤａｗｓｏｎＳｔｒｕｃｔｕｒｅＷＡＮＧＥｎ－ｂｏ；ＬＩＢａｉ－ｔａｏ；ＷＡＮＧＺｕｏ－ｐｉｎｇａｎｄ...     

Synthesis and Electrochemical Performance of Spinel LiMn2O4—x（SO4）x Cathode Materials

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｒｅｃｅｎｔｙｅａｒｓ ,ｗｉｔｈｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆａｌｌｓｏｒｔｓｏｆｃｅｌｌｕｌａｒｐｈｏｎｅｓ ,ｃａｍｃｏｒｄｅｒｓ ,ｌａｐｔｏｐｃｏｍｐｕｔｅｒｓ ,ｔｈｅｌｉｔｈｉｕｍ ｉｏｎｓｅｃｏｎｄａｒｙｂａｔｔｅｒｉｅｓｂａｓｅｄｏｎｔｈｅｕｓｅｏｆｌｉｔｈｉ ｕｍ ｍａｎｇａｎｅｓｅ ｏｘｉｄｅＬｉＭｎ2 Ｏ4 1,2 ｈａｖｅａｔｔｒａｃｔｅｄｍｕｃｈａｔ ｔｅｎｔｉｏｎ .ＢｕｔｔｈｅＬｉＭｎ2 Ｏ4 ｃａｔｈｏｄｅｍａｔｅｒｉａｌｈａｓａｄｉｓａｄ ｖａｎｔａｇｅｏｆ…     

Ab initio Calculation and Kinetic Study for the Abstraction Reaction of H with Sihcl3

ＴｒｉｃｈｌｏｒｏｓｉｌａｎｅｉｓａｎｉｍｐｏｒｔａｎｔｍａｔｅｒｉａｌｉｎｐｌａｓｍａＣｈｅｍｉｃａｌＶａｐｏｒＤｅｐｏｓｉｔｉｏｎ (ＣＶＤ)ａｎｄｉｎｓｅｍｉｃｏｎｄｕｃｔｏｒｄｅｖｉｃｅｐｒｏｃｅｓｓ .1 4 Ｔｈｅｒｅａｃｔｉｏｎｏｆｔｒｉｃｈｌｏｒｏｓｉｌａｎｅｗｉｔｈａｔｏｍｉｃｈｙｄｒｏｇｅｎ ,ｔｈｅｓｉｍｐｌｅｓｔｆｒｅｅ ｒａｄｉｃａｌｓｐｅｃｉｅｓ,ｈａｓｄｒａｗｎｃｏｎｓｉｄｅｒａｂｌｅａｔｔｅｎｔｉｏｎ :ｋｉｎｅｔｉｃｐａｒａｍｅｔｅｒｓｆｏｒＨ ａｔｏｍｒｅａｃｔｉｏｎａｒｅｄ…     

Synthesis,Proton Conductivity and Humidity Sensing Property of γ-Type Zirconium Hydrogen Phosphate,Zr(HPO_4)_2·2H_2O

ＩｎｔｒｏｄｕｃｔｉｏｎＦａｓｔｐｒｏｔｏｎｃｏｎｄｕｃｔｏｒｓｈａｖｅｂｅｅｎｓｔｕｄｉｅｄｆｏｒｓｅｖｅｒａｌｄｅｃａｄｅｓｄｕｅｔｏｔｈｅｉｒａｐｐｌｉｃａｔｉｏｎｓｔｏｌｏｗｔｅｍｐｅｒａｔｕｒｅｆｕｅｌｃｅｌｓａｎｄｈｕｍｉｄｉｔｙｓｅｎｓ...     

Preparation and Properties of Water-based Conducting Polyaniline

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｐａｓｔｄｅｃａｄｅ，ｃｏｎｊｕｇａｔｅｄｃｏｎｄｕｃｔｉｎｇｐｏｌｙｍｅｒｓｌｉｋｅｐｏｌｙａｎｉｌｉｎｅ，ｐｏｌｙｔｈｉｏｐｈｅｎｅａｎｄｐｏｌｙｐｙｒｏｌｅｈａｖｅｒｅｃｅｉｖｅｄｃｏｎｓｉｄｅｒａｂｌｅａｔｅ...     

Catalytic Spectrophotometric Determination of Ultratrace Amounts of Silver with Solubilizing Effect of Nonionic Surfactant

ＩｎｔｒｏｄｕｃｔｉｏｎＴｒｉａｚｅｎｅｒｅａｇｅｎｔｓａｒｅｉｎｔｅｒｅｓｔｉｎｇｂｅｃａｕｓｅｏｆｔｈｅｉｒｓｔｒｏｎｇｃｏｍｐｌｅｘａｔｉｏｎａｂｉｌｉｔｉｅｓｗｉｔｈｔｒａｎｓｉｔｉｏｎｍｅｔａｌｓ .1 6Ｈｏｗｅｖｅｒ,ｌｉｔｔｌｅｄｅｃｏｌｏｒａｔｉｏｎｏｆｔｈｅｍｃａｔａｌｙｚｅｄｂｙｓｉｌｖｅｒｉｏｎｈａｓｂｅｅｎｓｔｕｄｉｅｄｉｎａｎａｌｙｔｉｃａｌｃｈｅｍｉｓｔｒｙ .Ｍａｎｙａｎａｌ ｙｓｉｓｔｓｈａｖｅｒｅｐｏｒｔｅｄｔｈｅｕｓｅｏｆｃａｔａｌｙｔｉｃｒｅａｃｔｉｏｎｓｆｏｒｔ…     

Preparation of the Solid Electrolytes Li4+xAlxSi1‐xO4‐yLi3PO4 and Their Ionic Conductivity

The ion conductors Li_4+xAl_xSi_1‐xO₄‐yLi₃PO₄ (x = 0 to 0.5, y = 0 to 0.6) were prepared by the Sol‐Gel method. The powder and sintered samples were characterized by DTA‐TG, XRD, SEM, and AC impedance techniques. The conductivity and sinterability increased when y increased from 0 to 0.4 in the Li_4+xAl_xSi_1‐xO₄‐yLi₃PO₄. The particle size of the powder samples is about 0.13 μm. The maximum conductivity at 20 °C is 3.128 × 10^?5s cm^?1 for Li_4.4Al_0.4Si_0.6O₄‐0.4 Li₃PO₄.     

Preparation of Li_(4.4)Al_(0.4)Si_(0.6)O_4-xLi_3BO_3 Solid Electrolytes by Sol-Gel Method and Their Ionic Conductivity

Ｉｎｔｒｏｄｕｃｔｉｏｎ　　ＩｎｔｈｅｓｅａｒｃｈｆｏｒｎｅｗＬｉ+ ｉｏｎｃｏｎｄｕｃｔｉｎｇｓｏｌｉｄｓｗｉｔｈｐｏｔｅｎｔｉａｌａｐｐｌｉｃａｔｉｏｎｓａｓｓｏｌｉｄｅｌｅｃｔｒｏｌｙｔｅｓｉｎｈｉｇｈ ｅｎｅｒｇｙｄｅｎｓｉｔｙｂａｔｔｅｒｉｅｓ ,ｃｏｎｓｉｄｅｒａｂｌｅｗｏｒｋｈａｓｂｅｅｎｄｏｎｅｏｎａｖａｒｉｅｔｙｏｆＬｉ+ ｉｏｎｅｌｅｃｔｒｏｌｙｔｅｓ .Ｌｉ4 ＳｉＯ4 ｂａｓｅｄｓｏｌｉｄｓｏｌｕ ｔｉｏｎｓａｒｅｗｅｌｌｋｎｏｗｎｆｏｒｔｈｅｉｒｇｒｅａｔｉｎｃｒｅａｓｅｉｎｃｏｎ…     

The Ionic Conductivity of Solid Electrolytes for Li4+xMxSi1–xO4‐yLi2O (M=Al,B) Systems

The Li_4+xM_xSi_4+xO₄‐yLi₂O (M=Al, B; x = 0 to 0.6, y = 0 to 0.5) ion conductors were prepared by the Sol‐Gel method and examined in detail. The powder and sintered samples were characterized by DTA‐TG, XRD, SEM, and AC impedance techniques. The experimental results show that the conductivity and sinterability in creased with the amount of excess lithium oxide in the silicate. The Li₂O phase acts as a flux to accelerate the sintering process and to obtain high conductivity of grain boundaries. The particle size of the sintered pellets is about 0.25 μm. The maximum conductivity at 200 °C is 5.40 × 10^?3s cm^?1 for Li_4.4Al_0.4 Si_0.6O₄‐0.3Li₂O.     

The Ionic Conductivity of Ultrafine Solid Electrolytes for Li4.4Al0.4Si0.6O4‐xY2O3 Systems

The Li_4.4Al_0.4Si_0.6O₄‐xY₂O₃ (x = 0 to 0.5) ion conductors were prepared by the Sol‐Gel method and examined in detail. The powder and sintered samples were characterized by DTA‐TG, XRD, SEM, and AC impedance techniques. The experimental results show that the conductivity and sinterability increased with the amount of excess Y₂O₃ in the silicate. The particle size of the powder samples is about 0.12 μm. The maximum conductivity at 16 °C is 2.925 × 10^?5s·cm^?1 for Li_4.4Al_0.4Si_0.6O₄‐0.3 Y₂O₃.     

Structural Variations in the Solid‐Solution Series LnxCa2−xAl[Al1+xSi1−xO7] with 0 ≤ x ≤ 1 and Ln = La,Eu, Er

Gehlenite, Ca₂Al[AlSiO₇], has melilite‐type structure with space group . It contains two topologically distinct positions coordinated tetrahedrally by oxygen. One is completely occupied by Al³⁺, whereas the other one contains Al³⁺ and Si⁴⁺. Normally, the Al³⁺ molar fraction in the second tetrahedrally coordinated position does not exceed x_Al = 0.5, i.e. the so‐called Loewenstein‐rule is obeyed. In this contribution the structural variations in the melilite‐type compounds of the compositions La_xCa_2?xAl[Al_1+xSi_1?xO₇], Eu_xCa_2?xAl[Al_1+xSi_1?xO₇] and Er_xCa_2?xAl[Al_1+xSi_1?xO₇] are discussed. All members of the solid solution except the end‐members violate Loewenstein's rule. Rietveld refinements against X‐ray powder diffraction patterns confirm that the compounds have space group , without changes in the Wyckoff‐positions of the ions compared to gehlenite.     

Li+ ion conductivity in the system Li4SiO4Li3VO4

Two ranges of solid solutions were prepared in the system Li₄SiO₄Li₃VO₄: Li_4?xSi_1?xV_xO₄, 0 < x ? 0.37 with the Li₄SiO₄ structure and Li_3+yV_1?ySi_yO₄, 0.18 ? y ? 0.53 with a γ structure. The conductivity of both solid solutions is much higher than that of the end members and passes through a maximum at ～40Li₄SiO₄ · 60Li₃VO₄ with values of ～1 × 10^?5 ohm^?1 cm^?1 at 20°C, rising to ～4 × 10^?2 ohm^?1 cm^?1 at 300°C. These conductivities are several times higher than in the corresponding Li₄SiO₄Li₃(P,As)O₄ systems, especially at room temperature. The solid solutions are easy to prepare, are stable in air, and maintain their conductivity with time. The mechanism of conduction is discussed in terms of the random-walk equation for conductivity and the significance of the term c(1 ? c) in the preexponential factor is assessed. Data for the three systems Li₄SiO₄Li₃YO₄ (Y = P, As. V) are compared.     

Darstellung,Eigenschaften und Kristallstruktur von RuSn6[(Al1/3–xSi3x/4)O4]2 (0 ≤ x ≤ 1/3) – einem Oxid mit isolierten RuSn6‐Oktaedern

Preparation, Properties, and Crystal Structure of RuSn₆[(Al_1/3–xSi_3x/4)O₄]₂ (0 ≤ x ≤ 1/3) – an Oxide with isolated RuSn₆ Octahedra RuSn₆[(Al_1/3–xSi_3x/4)O₄]₂ is obtained by the solid state reaction of RuO₂, SnO₂, Sn, and Si in an Al₂O₃‐crucible at 1273 to 1373 K. The compound is cubic with the space group Fm 3 m (a = 9.941(1) Å, Z = 4, R₁ = 0.0277, wR₂ = 0.0619), a semiconductor and stable in air. Results of Mößbauer measurements as well as bond length‐bond strength calculations justify the ionic formulation Ru²⁺Sn₆²⁺[(Al_1/3–x³⁺Si_3x/4⁴⁺)O₄^2–]₂. The central motif of the crystal structure are separated RuSn₆‐octahedrea. These are interconnected by oxygen atoms, arranged tetrahedrely above the surfaces of the RuSn₆‐octahedrea and partialy filled with Al and Si, respectively. Because of these features the compound can be considered as a variant of the crystal structure type of pentlandite.     

Sol-gel Synthesis and Electrochemical Performance of Li4-xMgxTi5-xZrxO12 Anode Material for Lithium-ion Batteries

The anode materials Li_4?xMg_xTi_5?xZr_xO₁₂ (x=0, 0.05, 0.1) were successfully synthesized by sol‐gel method using Ti(OC₄H₉)₄, CH₃COOLi·2H₂O, MgCl₂·6H₂O and Zr(NO₃)₃·6H₂O as raw materials. The crystalline structure, morphology and electrochemical properties of the as‐prepared materials were characterized by XRD, SEM, cyclic voltammograms (CV), electrochemical impedance spectroscopy (EIS) and charge‐discharge cycling tests. The results show that the lattice parameters of the Mg‐Zr doped samples are slightly larger than that of the pure Li₄Ti₅O₁₂, and Mg‐Zr doping does not change the basic Li₄Ti₅O₁₂ structure. The rate capability of Li_4?xMg_xTi_5?xZr_xO₁₂ (x=0.05, 0.1) electrodes is significantly improved due to the expansile Li⁺ diffusion channel and reduced charge transfer resistance. In this study, Li_3.95Mg_0.05Ti_4.95Zr_0.05O₁₂ represented a relatively good rate capability and cycling stability, after 400 cycles at 10 C, the discharge capacity retained as 134.74 mAh·g^?1 with capacity retention close to 100%. The excellent rate capability and good cycling performance make Li_3.95Mg_0.05Ti_4.95Zr_0.05O₁₂ a promising anode material in lithium‐ion batteries.     

NASICON结构的锂离子导电微晶玻璃结构与电导率

通过对LixAlx-1Ge3-x(PO4)3(x=1.1～1.9)锂离子导电玻璃的差示量热扫描(DSC)数据,结合XRD及其Rietveld精修、FESEM和交流阻抗等测试方法,研究了该系微晶玻璃的物相组成、主晶相晶胞参数变化情况、微观结构形貌、锂离子电导率和电化学窗口等。结果表明:LixAlx-1Ge3-x(PO4)3(x=1.1～1.9)锂离子导电微晶玻璃析出导电主晶相为LiGe2(PO4)3。当x=1.5时,由于导电主晶相LiGe2(PO4)3晶粒充分长大、分布均匀,晶界清晰,LAGP导电微晶玻璃的室温电导率最高(可达5.3×10-4 S.cm-1),电化学窗口为7.2V,可以满足全固态锂离子电池对电解质高室温电导率和宽电化学窗口的应用要求。     

Lithium aluminate-doped lithium orthosilicate: Sol-gel ceramics and lithium dynamics

Dense ceramics (Li_4+xSi_1−xAl_xO₄ with 0 ≤ x ≤ 0.3) are obtained by sintering at 700–900°C, without prior calcination, of sol-gel powders prepared by an alkoxide-hydroxide route. In comparison with the pure lithium orthosilicate (3 × 10⁻⁴ S · cm⁻¹ at 350°C), only a slight enhancement of the ionic conductivity is noted for monophase ceramics with Li₄SiO₄-type structure (5 × 10⁻⁴ S · cm⁻¹ at 350°C for x = 0.3). Higher conductivity (2 × 10⁻² S · cm⁻¹ at 350°C) is observed for an heterogeneous material formed of a lithium silicoaluminate phase (x = 0.2) with the Li₄SiO₄-type structure coexisting with lithium hydroxide. In this two-phase material, ac conductivity and ⁷Li spin-lattice relaxation data are consistent with the formation of a new kinetic path, via a thin layer along the interface, which enhances the lithium mobility.