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雌二醇的流动注射阻抑化学发光法测定

分析测试学报 2010年第4期29卷 390-393页

作者：马艳曹伟公丕学刘雯汶陈淑贞杨景和济南大学化学化工学院山东济南250022 山东大学化学化工学院山东济南250100

基于碱性介质中雌二醇对N-溴代丁二酰亚胺-钙黄绿素化学发光体系的阻抑作用，建立了雌二醇的流动注射化学发光分析新方法，优化了其分析条件，并初步探讨了该化学发光反应的机理。该方法测定雌二醇的线性范围为0．02～0．1、0．1—8．0m... 详细信息

基于碱性介质中雌二醇对N-溴代丁二酰亚胺-钙黄绿素化学发光体系的阻抑作用，建立了雌二醇的流动注射化学发光分析新方法，优化了其分析条件，并初步探讨了该化学发光反应的机理。该方法测定雌二醇的线性范围为0．02～0．1、0．1—8．0mg／L，检出限为0．0085mg／L。对0．1mg／L的雌二醇标准溶液进行11次平行测定，相对标准偏差为1．2％。将该法用于注射液中雌二醇的测定，结果满意。

关键词： N-溴代丁二酰亚胺钙黄绿素雌二醇化学发光流动注射分析

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硫化锌性质、用途及制备方法概述

山东化工 2003年第2期32卷 12-15页

作者：王敦青焦秀玲陈代荣德州学院化学系山东德州253023 山东大学化学院山东济南250100

介绍了ZnS的结构、性质 ,重点介绍了ZnS的优异性能及其在各个领域的应用前景 ,并就目前制备ZnS的各种方法作了简单的介绍与评述。

关键词：硫化锌性质用途制备方法

Synthesis of a novel centipede-like copolymer of styrene and methyl methacrylate

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Science china chemistry 2007年第2期50卷 253-257页

作者： LI AiXiang1 & LU ZaiJun2 1 school of Material Science and engineering,shandong university of Technology,Zibo 255049,china 2.school of chemistry and chemical engineering,shandong university,jinan 250100,china 1. school of Material Science and engineering Shandong University of Technology Zibo 255049 China 2. school of chemistry and chemical engineering Shandong University Jinan 250100 China

A well-defined,A2B-type,centipede-like copolymer of styrene and methyl methacrylate(PS-PS-PMMA) was synthesized by the combination of living anionic polymerization and atom transfer radical polym-erization(ATRP) . The synthetic approach involves the coupling reaction of polystyrene(PS) backbone bearing 1,1-diphenylethene(DPE) pendant groups,produced by ATRP and Wittig reaction,with living polystyryllithium(PSLi) ,and subsequent polymerization of the resulting 1,1-diphenylmethyl anions with methy methacrylate. The centipede-like copolymer was characterized by 1H NMR,IR,SEC,SLS,and DSC measurements.

关键词： architecture atom transfer radical polymerization centipede-like copolymer coupling reaction living anionic polymerization

Study on the cluster of floating dross before nucleating during hot-dipping process

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Science china chemistry 2005年第1期48卷 83-88页

作者： WEI Yunhe1, ZHANG Changqiao1, QIN Jingyu2 & LIU Chengbu1 1. school of chemistry and chemical engineering, shandong university, jinan 250100, china 2. The Key Laboratory of Liquid Structure and Heredity of Materials of Ministry of Education, shandong university, jinan 250061, china 1. school of chemistry and chemical engineering Shandong University 250100 Jinan China 2. The Key Laboratory of Liquid Structure and Heredity of Materials of Ministry of Education Shandong University 250061 Jinan China

During hot-dipping in molten Zn-55Al, the forming of “floating” dross is closely re- lated with the interaction between the Al and the Fe atoms. Utilizing the thita-thita X-ray diffraction and the Percus-Yevick hard sphere model, this paper investigates the structure of molten Al3Fe that is an approximant of partial melt in practical Zn-55Al alloy melt. It is found that in the melt there exist clusters that resemble the structure of intermetallic compound Al3Fe. The strong in- teraction between Al and Fe atoms is also indicated by the deficiency of the coordination number from 12 and the shrinkage of averaged atomic diameter. Based on such information, it is specu- lated that in the molten Zn-55Al, with the accumulation of Fe, Al3Fe-like clusters form with priority, then grow into dross. On the other hand, after deflating of the effective hard sphere diameter of pure Al atom and enlarging that of the pure Fe atom, the modified model can achieve reasonable fit to the experimental structure factor. Hard sphere modeling also gave a good estimation of the mass density 3.65 g/cm3 of liquid Al3Fe alloy at 1550℃. Compared with the density of 3.7 g/cm3 of Zn-55Al, the reason for dross floating is satisfactorily understood.

关键词： hot-dipping, dross, Al3Fe alloy, molten structure, P-Y model.

Molecular Electrical Conductor Ni(C_3S_5)_2

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Journal of Materials Science & Technology 1996年第6期12卷 457-460页

作者： Hong LEI (Dept. of Electronic engineering, shandong university, jinan 250100, china)Qi FANG and Minhua JIANG (Institute of Crystal Materials, shandong university, jinan 250100, china)Yueming SUN (Dept. of chemistry Southeast university Nanjing 210093, Ch Dept. of Electronic engineering Shandong University Jinan 250100 China Institute of Crystal Materials Shandong University Jinan 250100 China Dept. of chemistry Southeast University Nanjing 210093 China

The molecular based electrical conductor Ni(C3S5)2 has been prepared and its conductivity has been measured from room temperature down to 60 K. Above 167 K Ni(C3S5)2 exhibits a semiconductive behaviour, below this temperature it turns to exhibit metallic conductivity. Based on a tight-binding energy band calculation, an expression for the number of conducting electrons has been deduced. The calculated conducting activation energy is quite well in accordance with the measuring value.

关键词： Molecular Electrical Conductor Ni C3S5 Pt

Performance of Hyperspherical Harmonic Expansionon the Low-lying P and D States of Helium Atom

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chemical Research in Chinese Universities 2000年第4期16卷 351-355页

作者： WANG Yi-xuan, ZHUANG Bing-you and LIU Cheng-bu (school of chemistry, shandong university, jinan 250100, china) (Department of chemistry, Weifang College, Weifang 261043, china) shandong Univ Sch Chem Jinan 250100 Peoples R China Weifang Coll Dept Chem Weifang 261043 Peoples R China

The wave functions of the n1,3p (n=2, 3, 4) and the n 1,3D (n=3, 4, 5 ) low-lying states of the helium atom are expanded into the complete sets of the symmetrically adapted basis functions from hyperspherical harmonic functions in the angle part and of generalized Laguerre functions in the radial part respectively, and are then augmented by the simplest type of Jastrow correlation factor to incorporate electron-nucleus cusp only. The excellent agreement between the present nonrelativistic eigen-energies and those from the sophisticated configuration interaction (CI) method for the examined states indicates that the hyperspherical harmonic method can also be applied to the P and the D excited states of the helium atom.

关键词： Hyperspherical coordinate Helium atom Excited state

Size effect of fullerene cages and encaged clusters in M3N@C2n

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Science china chemistry 2009年第5期52卷 584-589页

作者： GAN LiHua school of chemistry and chemical engineering, Southwest university, Chongqing 400715, china school of chemistry and chemical engineering Southwest University Chongqing 400715 China

Based on the calculated findings that the sizes of encaged clusters determine the structures and the stability of C80-based trimetallic nitride fullerenes (TNFs), more extensive density functional theory calculations were performed on M3N@C68, M3N@C78 and M3N@C80 (M=Sc, Y and La). The calculated results demonstrated that the structures and stability undergo a transition with the increasing of the sizes of the cages and clusters. Sc3N is planar inside the three considered cages, Y3N is slightly pyramidal inside C68-6140 and C78-5 and planar inside I h C80-7, however, La3N is pyramidal inside all the three cages. Those cages with pyramidal clusters inside deformed considerably, compared with their parent cages. In these cases, the bonding of metallic atoms toward the cages does not play an impor-tant role, and the encaged cluster tends to be located inside the cages with the largest M-M and M-C distances so that the strain energy can be released mostly. These calculations revealed the size effect of fullerene cages and encaged clusters, and can explain the position priority of M3N inside fullerene cages and the differences in yield of M3N@C2n.

关键词： trimetallic nitride fullerenes (TNFs) density functional theory (DFT) size effect stability

Adsorption studies of the removal of anions from aqueous solutions onto an adsorbent prepared from wheat straw

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Science china chemistry 2010年第6期53卷 1414-1419页

作者： XU Xing,GAO Yue,GAO BaoYu,YUE QinYan & ZHONG QianQian school of Environmental Science and engineering,shandong university,jinan 250100,china 1. school of Environmental Science and engineering Shandong University Jinan 250100 China

Modified wheat straw (MWS) was prepared by the grafting of epichlorohydrin,triethylamine and ethylenediamine onto *** characteristics of MWS and its adsorption capacity for NO-3,PO34and Cr2O72were *** results indicate that amine groups with positive charge have been introduced into the structure of MWS,and significantly increased its anion adsorption *** functions of MWS dosage,the solution pH,the contact time and temperature have significant influence on the adsorption process,and the adsorption is well fitted with the Langmuir equation and pseudo second-order *** maximum adsorption capacity of MWS for NO-3,PO34(P) and Cr2O27(Cr) is 53.5,62.4 and 386.2 mg g-1,respectively.

关键词： wheat straw anion adsorption maximum adsorption capacity

Theoretical study of bifurcated bent blue-shifted hydrogen bonds CH_2…Y

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Science china chemistry 2008年第7期51卷 623-631页

作者： LI AnYong school of chemistry and chemical engineering, Southwest university, Chongqing 400715, china school of chemistry and chemical engineering Southwest UniversityChongqing 400715China

Ab initio quantum chemistry methods were applied to study the bifurcated bent hydrogen bonds Y… H2CZ (Z = O, S, Se) and Y…H2CZ2 (Z = F, Cl, Br) (Y = Cl-, Br-) at the MP2/6-311++G(d,p) and MP2/6-311++G(2df,2p) levels. The results show that in each complex there are two equivalent blue-shifted H-bonds Y…H—C, and that the interaction energies and blue shifts are large, the energy of each Y…H—C H-bond is 15-27 kJ/mol, and Δr(CH) = -0.1 - -0.5 pm and Δv(CH) = 30 - 80 cm-1. The natural bond orbital analysis shows that these blue-shifted H-bonds are caused by three factors: large rehybridization; small direct intermolecular hyperconjugation and larger indirect intermolecular hy- perconjugation; large decrease of intramolecular hyperconjugation. The topological analysis of elec- tron density shows that in each complex there are three intermolecular critical points: there is one bond critical point between the acceptor atom Y and each hydrogen, and there is a ring critical point inside the tetragon YHCH, so these interactions are exactly H-bonding.

关键词： bifurcated bent H-bonds blue-shifted H-bonds topological property of electron density intramolecular hyperconjugation