检索结果-南通市图书馆

Meet Our New Editorial Board Members of Rising Stars

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 2024年第16期42卷 1797-1805页

作者： Editorial Office of Chinese Journal of chemistry 不详

Editorial Board Memberof Rising Stars:Xiulin Fan,Professor,School of Materials Science and engineering Zhejiang university,Hangzhou,***:2003.2007,*** university,{3..2007-2012,*** university,{3.(Supervisor:*** Chen).

关键词： china. Editorial Hangzhou

Syntheses,characterization,crystal structure and magnetic properties of copper(Ⅱ) α,β-unsaturated carboxylate complexes with trimethyl phosphate

维普期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第12期46卷 987-991页

作者： WANG Yaoyu, LIU Ping, SHI Qian, GAO Yici & SHI Qizhen1. Department of chemistry, Northwest university, Xi’an 710069, china 2. Department of chemistry, Wenzhou Teachers College, Wenzhou 3.5003. china 3. Department of chemistry, lanzhou university, lanzhou 73.000, china Department of chemistry Northwest University Xi’an China Department of chemistry Wenzhou Teachers College Wenzhou China Department of chemistry Lanzhou University Lanzhou China

Two ternary complexes Cu2A4[OP(OCH3.3.2 (A represents CH2=CH-COO- and CH2=C(CH3.-COO-) have been synthesized, and elemental analyses, IR, ESR, electronic reflectance spectra and magnetic studies were carried out. The single crystal X-ray diffraction shows that Cu2[CH2=C(CH3.-COO]4[OP(OCH3.3.2 is triclinic, with space group P1, a = 1.05128(13., b = 1.7559(5), c = 1.94479(3. nm, α =91.263.14)°,(β = 102.559(6)°,γ= 106.3.9(13.°, Z = 4 and R = 0.0668. Two copper(Ⅱ) atoms are bridged by four (a-methacrylate groups, and each copper(Ⅱ) atom is coordinated with a trimethyl phosphate molecule in the axial position, forming a distorted square pyramidal configuration. The symmetric center is between the two copper(Ⅱ) atoms, and the Cu-Cu bond distance is 0.26098(6) nm. The Cu-Cu distance and magnetic studies suggest that there exist anti-ferromagnetic interactions between the two copper(Ⅱ) atoms.

关键词： copper(Ⅱ ) complex α β-unsaturated carboxylate trimethyl phosphate magnetic property crystal structure.

Meet Our New Editorial Board Members of Spotlights

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 2024年第16期42卷 1932-1936页

作者： Editorial Office of Chinese Journal of chemistry 不详

Editorial Board Member of *** ***,College of Materials Science and engineering Beijing university of Chemical ***:2006-2010,B.S.,Materials Science and engineering,Beijing university of Chemical Technology.2010-2015,Ph... 详细信息

关键词： Spotlight Editorial Board

Meet Our New Associate Editors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 2024年第11期42卷 1319-1321页

作者： Editorial Office of Chinese Journal of chemistry 不详

Associate Editor Dehui Deng Professor The State Key Laboratory of Catalysis Dalian Institute of Chemical Physics,Chinese Academy of Sciences,china(+86)0411-82463.70,dhdeng@***,https:/***/.Education:2003.2007 B.S.,Light Industry engineering and National Economy Management,Sichuan university.2007-2013.Ph.D.,Physical {3.,Dalian Institute of Chemical Physics,Chinese Academy of Sciences(Supervisor:*** Bao and *** Pan).

关键词： Dalian Economy Associate

Study on the two and three-parameter working stability regions of 3.-TZP suspension

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2006年第5期49卷 547-568页

作者： CHEN Youqiang1, 2, ZHANG Xinni3. CHEN Sha’ou3.& QI Ping3.1. Department of chemistry, Qingdao university, Qingdao 266071, china 2. Department of chemistry, Tsinghua university, Beijing 100084, china 3. Department of Physics, Qingdao university, Qingdao 266071, china 1. Department of chemistry Qingdao University Qingdao 266071 China 2. Department of chemistry Tsinghua University Beijing 100084 China 3. Department of Physics Qingdao University Qingdao 266071 China

We determined the variation tendency of viscosity (η) at various solids load- ing (α) for 3.-TZP suspension as a function of dispersant concentration (Cw) using vis- cosity measurement, measured the diameter of particles as a function of Cw in very dilute suspension using light scattering method, and obtained the surface features of the sedi- ment of suspension with different Cw using SEM. We also discussed the influence of the microstructure of adsorbed polymer layers on particles and their interactions in the dis- persing medium on the stability of suspension. Then two different stable states and two different unstable states for 3.-TZP suspension were given. Accordingly, the (Cw, η), (Cw, α), and (α, η) two-parameter, and (Cw, α, η) three-parameter stability maps were con- structed. Based on the DLVO theory calculations, the dispersant concentration, particle distance (r), and interparticle potential energy (VT) maps with various solids loading for 3.-TZP aqueous suspension were also constructed. In (Cw, r) two-parameter coordinate system, the stable motion region map for particles was established. The Cw, α, and VT,max (the highest potential energy) surface of the potential barrier map was obtained through calculation and simulation on the basis of the surfaces of Cw, r, VT maps introduced above. The (Cw, α) two-parameter stability map was then obtained from the Cw, α, VT,max map. The results showed that this theoretical map can qualitatively prove the experimentally obtained results—the existence of different dispersed states of particles in suspension system and the variation tendency of suspension stability with changing each parame- ter—were reasonable.

关键词： 3.-TZP, suspension, stability, DLVO theory, interparticle potential energy.

Synthesis of 6-aryl substituted 3.(5'-phenyl-2H-tetrazole-2'-methylene)-S-triazolo[3.4-b]-1,3.4-thiadiazoles

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 1995年第5期13卷 448-453页

作者： ZHANG, Zi-Yi ZOU, NingNational Laboratory of Applied Organic chemistry, Department of chemistry, lanzhou university, {3., Gansu 73.000, china National Laboratory of Applied Organic chemistry Department of Chemistry Lanzhou University Lanzhou Gansu 730000 China

In this paper , 10 novel 6-aryl-3.(5'-phenyl-2H-tetrazole-2'-methylene)-S-triazolo[3. 4-b]-1,3.4-thiadiazoles have been synthesized by the condensation of 3.(5'-phenyl-2H-tetrazole-2'-methylene)-4-amino-5-mercapto-1,2,4-triazole with various aromatic carboxylic acids in the presence of phosphorus oxychloride. The structure of these compounds was determined by elemental analysis , UV, IR, 1H NMR and MS. Their spectral properties were also discussed.

关键词： S-triazolo[3.4-b]-1,3.4-thiadiazole synthesis spectral analysis

Quantum chemistry Study on Dissociation of Oxalyl Bromide

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural chemistry 2005年第11期 116-121+12页

作者： GENG Zhi-Yuana② WANG Dong-Meia, c WANG Yong-Chenga DAI Guo-Lianga LU Ling-Linga WANG Han-Qingb a (College of chemistry and Chemical engineering, Northwest Normal university, {3. 73.070, china) b ({3. Institute of chemistry and Physics, The Chinese Academy of Sciences, lanzhou 73.000, china) c (Department of chemistry, Baoji College of Arts & Sci., Baoji 721007, china) College of chemistry and Chemical engineering， Northwest Normal university， {3. 73.070， china College of chemistry and Chemical engineering， Northwest Normal university， {3. 73.070， china Department of chemistry， Baoji College of Arts & Sci.， Baoji 721007，china lanzhou Institute of chemistry and Physics，The Chinese Academy of Sciences， lanzhou 73.000，{3.

The multi-bond dissociation dynamics of oxalyl bromide ((BrCO)2) has been in- vestigated by DFT and CIS calculations. Upon the results, conclusion could be drawn that disso- ciation of C–Br bond of oxalyl bromide at the ground state (S0) is of barrierless. After the absorption of a photon, (BrCO)2 is excited to the first excited state and one of its C–Br bonds is broken to yield Br˙* and BrCOCO˙* free radicals. In addition, BrCOCO˙* with high energy is apt to release en- ergy, and ultimately, turns into BrCOCO˙of the ground state. The energy is adequate for BrCOCO˙to break down into Br˙and 2CO; at the same time the C–C and C–Br bonds of BrCOCO˙free radicals dissociate.

关键词： oxalyl bromide multi-bond dissociation BrCOCO˙free radical DFT

Synthesis and Efficiency of a SphericalMacroporous Epoxy-dicyandiamide ChelateResin for Preconcentrating and SeparatingTrace Au, Hg, Pd and Ru from Samples

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2001年第2期17卷 168-174页

作者： GONG Bo-lin, LI Xue-qiang and WANG Feng-rong (Department of chemistry, Ningxia university, Yinchuan 750021, china) CHANG Xi-jun (Department of chemistry, lanzhou university, lanzhou 73.000, china) Ningxia Univ Dept Chem Yinchuan 750021 Peoples R China lanzhou Univ Dept Chem Lanzhou 730000 Peoples R China

A novel spherical macroporous epoxy-dicyandiamide chelate resin was synthesized simply and rapidly from epoxy resin and used for the preconcentration and separation of trace amounts of Au (Ⅲ ), Hg (Ⅱ ), Pd (Ⅳ) and Ru (Ⅲ) ions from solution samples. The analyzed ions can be quantitatively concentrated by the resin at a flow rate of 2. 0 mL/min at pH 4, and can also be desorbed with 15 mL of 4 mol/L HCl + 0. 3.g thiourea from the resin column with recoveries of 96. 5%-99. 0%. After the chelate resin was reused for 7 times, the recoveries of these ions were still over 92%, and 400-1 000 times of excess of Fe(Ⅲ ), Al(Ⅲ ), Ni( II), Mn( Ⅱ ), Cr (Ⅲ ), Cu ( Ⅱ ), Cd (Ⅱ ) and Pb (Ⅱ ) caused little interference with the determination of these ions by an inductively coupled plasma optical emission spectrometer (ICP-OES ). The capacities of the resin for the analytes are in the range of 0. 3.~0. 92 mmol/g. The RSDs of the proposed method are in the range of 1. 1 % ~4. 0% for each kind of the analyzed ions. The recoveries of a standard added in real solution samples are between 96. 5% and 98. 5%, and the results for the analyzed ions in a powder sample are in good agreement with their reported values.

关键词： Concentration Separation Macroporous epoxy-dicyandiamide chelate resin Gold Mercury Palladium and ruthenium.

Mathematic Expression of Kinetic Compensation Effect and Relationship between the Exothermic Decomposition Temperature and Critical Temperature of Thermal Explosion of Eighty-six Energetic Materials

在线全文

学校读者我要写书评

暂无评论

含能材料 2001年第1期9卷 8-9页

作者： HU Rong zu 1, YANG De suo 2, ZHANG Jiao qiang 3. (1. Department of chemistry,Northwest university, Xi′an 710065, china 2. Department of chemistry and Chemical engineering, Baoji College of Arts and Science, Baoji 721007, china 3. Department of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two relationships are established using the least squares method,between the kinetic parameters (the apparent activation energy and pre exponential constant),and the exothermic decomposition temperature and ther... 详细信息

关键词： critical temperature of thermal explosion decomposition temperature DSC energetic materials.