NMR频率综合器的微机控制

为实现ＰＴＳ系列频率综合器的微机控制，设计了一种简单的控制电路。在微机的控制下，通过该电路与微机的并行通讯口，用Ｃ语言编写的控制程序可以很方便的控制频率综合器的输出频率。控制程序采用菜单操作，电路所需的＋５Ｖ电源由微机提供，整个控制系统简单实用，值得推广。     

以马来酸酐为原料催化合成富马酸二甲酯

用马来酸酐与甲醇为原料,在浓盐酸为主的复合催化剂的作用下,经一步反应合成富马酸二甲酯.讨论了催化剂用量、酯化时间、异构时间、醇与酸酐比等因素对反应的影响.最适宜的反应条件为:n(甲醇):n(酸酐)=4:1,异构时间0.7h,酯化时间4h,催化剂用量为马来酸酐质量的3.5%.     

KIO3-KI混合液中各组分含量的测定

对武汉大学主编《分析化学实验》教材中KIO3-KI混合溶液各组分含量的测定作了较详细的探讨，获得了较高的回收率，且重复性好，对学生掌握分析方案设计有着较好的指导意义。     

Synthesis, Characterization and the Effect of Glucose-lowering of Guanidino Acid Oxovanadium（Ⅳ） Complexes

Two guanidino acid oxovanadium(Ⅳ) complexes have been synthesized. Preliminary tests in vivo have shown that the two title complexes all display lowering glucose activity in vivo to STZ-rats. The effect of glucose-lowering of guanidino acetic acid oxovanadium(Ⅳ) complex in vivo is higher than that of guanidino propanoic acid oxovanadium(Ⅳ) complex.     

8-羟基喹啉单体及二聚体质子转移反应的理论研究

Density functional theory （DFT） of quantum chemistry method was employed to investigate proton transfer reactions of 8-hydroxyquinoline （8-HQ） monomers and dimers. By studying the potential energy curves of the isomerization, the most possible reaction pathway was found. The total energy of 8-hydroxyquinoline was lower than that of quinolin-8（1H）-one, whereas the order was reversed in dimers. The findings explained the contrary experimental phenomena. The minimum reaction barrier of intramolecular proton transfer was 47.3 kJ/mol while that in dimer was only 25.7 kJ/mol. Hence it is obvious that proton transfer reactions of 8-HQ monomer have a considerable rate but it is easier to proceed for 8-HQ dimer than monomers. It implied that the hydrogen bond played an important role in depressing the activation energy of reaction. The mechanism of the tautomerization was discussed on the basis of theoretical results.     

春砂仁无机成分与药效的研究

采集了阳春县三个产地有代表性的春砂仁．用原子吸收光谱、控制气忿和罩帽电极发射光谱等法，测定其无机成分。结果表明，春砂仁对Zn、Mn有较大富集作用．其含量与春砂仁质量正相关；不同产地春砂仁的挥发油、无机成分与药效成分之间存在差别，证实以金花坑的春砂仁质量最优。     

硫酸介质中Ti／SnO2／PbO2析氧阳极的研究

由于硫酸溶液具有高的电导、一般条件下性质稳定、价格相对低廉等优点，所以电化学合成大多在硫酸溶液中进行．阳极析氧是电化学合成不可避免的阳极过程．但因硫酸的强腐蚀性，以及从阳极析出的氧的强氧化性，使得能满足工业生产的阳极材料很缺乏．自１９５０年荷兰Ｈｅｎ...     

Y_2O_3－Nb_2O_5－B_2O_3：Eu~（3＋）·Bi~（3＋）的燐光体的晶体结构与光谱性质

采用常规固相反应于１２００℃下制备了具有褐钇铌矿结构的Ｙ２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３（Ｙ（０．９３）Ｅｕ（０．０７））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３和（Ｙ（０．９１）Ｅｕ（０．０７）Ｂｉ０．０２））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３等光体，研究了它们的发光性质：结果表明，在２６８ｎｍ紫外光激发下，由于ＮｂＯ４基团于４１０ｎｍ处发生１Ｔ→１Ａ１跃迁，致使Ｙ２Ｏ５·Ｎｂ２Ｏ５·Ｂ２Ｏ３呈现更亮的紫外发射。体系中的Ｂ２Ｏ３可降低反应温度，增强ＮｂＯ４和Ｅｕ（３＋）的发光强度。（Ｙ（０．０９１）Ｅｕ（０．０７）Ｂｉ（０．０２））２Ｏ３·Ｎｂ２Ｏ５·Ｂ２Ｏ３燐光体系中所观察到的ＮｂＯ４→Ｅｕ（３＋）和Ｂｉ（３＋）→Ｅｕ（３＋）的能量传递使红光发射明显增强。     

超临界CO2固相接枝法制备马来酸酐改性聚丙烯的分级与表征

采用不同溶剂的连续萃取法,对超临界CO2固相接枝法制备的马来酸酐改性聚丙烯(PP-g-MAH)进行分级并获得了等规度不同的级份。对所得级份用傅立叶变换红外光谱仪(FT-IR)、差示扫描量热仪(DSC)和偏光显微镜(POM)表征,结果表明:接枝率不同的级份所对应的材料性能存在明显差异,接枝反应更易发生在非晶区或结晶不完善的区域,但接枝率越高的PP-g-MAH接枝越均匀。     

Synthesis and Luminescence Property of 4,4＇-Bis（2,2-di（4-fluorophenyl）vinyl）biphenyl for Organic Blue-Light-Emitting Diodes

The novel fluorinated distyrylarylene, 4,4＇-bis（2,2-di（4-fluorophenyl）vinyl）biphenyl （DFPVBi）, was synthesized and fully characterized. The structure was confirmed with IR, 1↑H NMR, 13↑C NMR, 19↑F NMR and MS analyses. Its electronic and photoluminescence properties were investigated by UV-Vis absorption, cyclic voltammetry and fluorescence spectroscopy. The energy levels of the highest occupied molecular orbital （HOMO） and the lowest unoccupied molecular orbital （LUMO） are --5.77 and --2.75 eV, respectively. The electroluminescence proper- ties of the organic light-emitting diode fabricated by DFPVBi were also studied. The device exhibits a pure blue emission peaked at 454 nm, which indicates a maximum luminance of 5872 cd/m ^2 at 14.2 V and a maximum current efficiency of 2.82 cd/A at 10V, respectively.