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

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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,{2. 2. Department of chemistry, Wenzhou Teachers college, Wenzhou 32.003,{2. 3. Department of chemistry, Lanzhou university, Lanzhou 730000,{2. 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 Cu2.4[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 = 1.0512.(13), b = 1.7559(5), c = 1.94479(3) nm, α =91.2.3(14)°,(β = 102.559(6)°,γ= 106.339(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 0.2.098(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.

The toxicity of Cu^(2.) to Microcystis aeruginosa using dielectric spectroscopy

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Science china chemistry 2010年第3期53卷 631-636页

作者： YU YanLi1,BAI Wei1,ZHAO KongShuang1& ZHOU YunLong2.1college of chemistry,Beijing Normal {2.,Beijing 100875,china 2.0} of life Science,Beijing Normal {2.,Beijing 100875,china college of chemistry Beijing Normal University Beijing China college of life Science Beijing Normal University Beijing China

Dielectric spectroscopy(DS) was utilized to investigate the toxicity of the Cu2. solution to Microcystis *** was found that 0.04 mM Cu2. had no effect on dielectric increment,whereas the Cu2. concentrations above 0.1 mM decreased the value of Δε/Δε *** toxic effect of Cu2. on *** cells was time-dependent and *** was a threshold concentration between 0.04 mM and 0.1 mM,which affected the cell membrane,suggesting that Cu2. at the concentrations higher than 0.1 mM caused serious plasmalemma damage to *** *** addition of 1 mM Ca2. or Mg2. did not protect *** cells from 1 mM Cu2. *** study demonstrates that DS monitors cell biomass facilitating observation of the toxic effects of metal ions.

关键词： Microcystis aeruginosa dielectric spectroscopy dielectric increment cupric ion toxicity

Preparation of Nanosized AlOOH and Its Application in Polymer-inorganic Nanocomposites

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Journal of wuhan university of Technology(Materials Science) 2008年第5期23卷 638-643页

作者：廖海达 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology college of chemistry and Ecological Engineering Guangxi University for Nationalities Key Lab of Nonferrous Materials and New Processing Technology (Guangxi university Guilin University of Technology) Ministry of Education

With industrial grade Al（OH）3 as raw materials, the self dispersion nanosized AlOOH crystal powder were prepared by the sol-hydrothermal method. The results of XRD and TEM show that the nanosized AlOOH could automatically disperse to a single-dispersing state in water without surface modification, dispersant, additive and accessional conditions （ultrasonic wave dispersing, ball-mill dispersing）. The application results of the product indicate that the nanosized AlOOH can be composed into a toughened nanocomposites without surface modification. Accordingly, the self dispersion characteristic and mechanism of hydrothermal crystallization and charging composite dispersion of nanosized AIOOH are found, and a new technique of preparing polymer/inorganic nanocomposites is proposed, which is called blending compositing new techniques of sol even dispersing at auasi-homogeneous phase.

关键词： self dispersion nanosized AlOOH peptizing-hydrothermal method nanocomposites

Preparation of chemical manganese dioxide from manganese sulfate

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Mining Science and Technology 2010年第6期20卷 877-881页

作者： FU Jiangang, HE Zhangxing, WANG Hui, LIANG Wei, GUO Chao college of chemistry and Chemical Engineering, {2. south university, Changsha 410083, china college of chemistry and Chemical Engineering Central South University Changsha 410083 China

Chemical Manganese Dioxide （CMD） was prepared by an alkali-oxidation method. There are several virtues to this environmental friendly and clean process, including the nontoxic and harmless reagents and products, easy operations, no pollutants, easily obtained raw materials and moderate reaction conditions. The synthesized manganese dioxide was characterized by XRD and SEM. The particles were small, consisting primarily of α-MnO2.and γ-MnO2. Experimental results showed that the optimum conditions were： MnSOa.H2. to NaOH ratio, 1.0：2.4; catalyst concentration （catalyst TF-2., 6% of the MnSO4; initial solution pH, 11; reaction time and temperature, 2. min and 80 ℃; air flow, 0.2. m3/h; and, agitation rate, 700 r/rain. The conversion of MnSO4 can exceed 80% under these optimum conditions.

关键词： MnSO4 alkali-oxidation chemical manganese dioxide clean process

Preparation of 5N high purified indium by the method of chemical purification-electrolysis

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Rare Metals 2002年第2期21卷 137-141页

作者： ZENG Dongming, ZHOU Zhihua, SHU Wangen, LIU Younian, and HU Aipingcollege of chemistry and Chemical Engineering, {2. south university, Changsha 410083, china college of chemistry and Chemical Engineering Central South University Changsha 410083

The application of indium requires high purity indium as material.5N high purity indium had been prepared by the method of acombination of chemically smelting and electrolysis. Smelting timewas 10 min, the abstraction rate of cadmium was 80/100-90/100 whenused solution of I_2.KI and glycerine to smelt indium. 4N metalindium was used as anode, high purity indium as cathode, In-2.SO_4)_3-H_2.O_4 system as electrolyte, and In content is 100 g/L, pH2.3 and current density 80-100 a/m^2.

关键词： high-purify indium preparation chemical purifying

Theoretical study of the mechanism for C-H bond activation in spin-forbidden reaction between Ti^+ and C_2._4

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Science china chemistry 2009年第3期52卷 295-303页

作者： LV LingLing1, LIU XinWen1, YUAN Kun1, WANG XiaoFang1 & WANG YongCheng2.1 college of life Science and {2., Tianshui Normal university, Tianshui 741001, china 2.college of {2. and Chemical Engineering, Northwest Normal university, Lanzhou 730070, china college of life Science and {2. Tianshui Normal University Tianshui China college of chemistry and Chemical Engineering Northwest Normal University Lanzhou China

The mechanism of the spin-forbidden reaction Ti+(4F, 3d2.s1) + C2.4 → TiC2.2. (2.2. + H2.on both doublet and quartet potential energy surfaces has been investigated at the B3LYP level of theory. Crossing points between the potential energy surfaces and the possible spin inversion process are discussed by means of spin-orbit coupling (SOC) calculations. The strength of the SOC between the low-lying quartet state and the doublet state is 59.3 cm-1 in the intermediate complex IM1-4B2. Thus, the changes of its spin multiplicity may occur from the quartet to the doublet surface to form IM1- 2.1, leading to a sig-nificant decrease in the barrier height on the quartet PES. After the insertion intermediate IM2. two dis-tinct reaction paths on the doublet PES have been found, i.e., a stepwise path and a concerted path. The latter is found to be the lowest energy path on the doublet PES to exothermic TiC2.2. (2.2. + H2.products, with the active barrier of 4.52.kcal/mol. In other words, this reaction proceeds in the following way: Ti++C2.4 →4IC→IM1-4B2.4,2.SC→IM1- 2.1→[2.Sins]→IM2.[2.SMCTS]→IM5→TiC2.2.(2.2.+H2.

关键词： Ti+(4F) and C2.4 spin-forbidden reaction mechanism spin-orbit coupling (SOC) concerted path

Interaction of bis-aryl functionalized molecules with nucleosides and nucleic acids

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Science china chemistry 2010年第1期53卷 103-112页

作者： HUANG Yu1,LIU JunLiang1,ZHANG Ji1,LIU Qiang1,HOU JiTing1,ZHANG Yu1,ZHANG DaWei2.LU QiaoSen1,CHEN ShanYong1,LIN HongHui2.& YU XiaoQi1 1 Key Laboratory of Green chemistry and Technology,Ministry of Education college of chemistry,Sichuan university,Chengdu 610064,china 2.Key Laboratory of Bio-resources and Eco-environment,Ministry of Education college of life sciences,Sichuan university,Chengdu 610064,china. Key Laboratory of Green chemistry and Technology Ministry of Education college of chemistry Sichuan University Chengdu China Key Laboratory of Bio-resources and Eco-environment Ministry of Education college of life {2. Sichuan University Chengdu China

A series of novel molecules with a cyclen(1,4,7,10-tetraazacyclododecane) moiety appended on and bearing different aromatic fragments in the structures were synthesized and *** binding activities of these compounds towards DNA were systematically studied by spectroscopic,viscometric and gel electrophoresis *** results suggest that the stacking interaction plays an important role in improving the DNA binding ability of the *** binding modes of the compounds towards DNA are also affected by the sizes of the aromatic *** binding interaction between binaphthyl compound 1b and several nucleosides was studied by fluorescence *** interaction and hydrophobic interaction play the key role in such non-selective binding process.

关键词： stacking and hydrophobic interactions DNA binding aromatic compounds nucleosides oligonucleotides

Synthesis of Cyclic Core Dendritic Polymer and Its Usage as a Vector for Transferring Foreign DNA into Human Cells

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Chinese Chemical Letters 1998年第7期9卷 635-638页

作者： Bo DU Rong Jia ZHOU Ren Xi ZHUO (Laboratory of Biomedical Polymer Materials of the State Education Commission of china, Department of chemistry )(Department of Genetic, {2. of life sciences,wuhan university, wuhan 430072. Lab. Biomed. Poly. Mat. State E.C.C. Department of Chemistry Wuhan University Wuhan 430072 China Department of Genetic College of Life Sciences Wuhan University Wuhan 430072 China

Cyclic core dendritic polymer is a new type of synthetic polymer. We describe the first synthesis of a serial dendrimers with a core of 1,4,7,10-tetraazacyclododecane. The ability of generation 4 of dendrimers to function as an effective gene delivery vectors was also investigated. Results from fluorescent in situ hybridization (FISH) show that the dendrimer has good affinity to both DNA and human small intestine cancer metastatic (HICMA) cells. the LacZ gene was highly expressed in the cells.

关键词： dendrimer 1,4,7,10-tetraazacyclododecane Michael addition transfection DNA

Characterization and Electrochemical Properties of LiMn_2._4 Thin Films Prepared by Solution Deposition

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Journal of wuhan university of Technology(Materials Science) 2006年第3期21卷 54-56页

作者：吴显明 college of chemistry and Chemical Engineering Jishou UniversityJishou 416000China

LiMn2.4 thin films were prepared by solution deposition using lithium acetate and manganese acetate us raw materials. The phase constitution and surface morphalogy were observed by X-ray diffraction and scanning electron microscopy. The electrochemical properties of the thin films were studied by cycilc voltammetry, charge- discharge experiments and impedance spectroscopy in 1 mol· L^-1 LiPF6 / EC- DMC solution using lithium metal as both the counter and reference electrodes. The films prepared by this method are of spinel phase. The lattice parameter increases with the annealing temperature aud annealing time. The film annealed at 750 ℃ for 30 minutes has the highest capacity of 34.5 μAh ·cm^- 2.μm^-1 , and its capacity loss per cycle is 0. 05% afrer being cycled 100 times.

关键词： thin films lithium manganese oxide lithium-ion battery solution deposition