Ordered nickel oxide nanowire arrays and their optical absorption properties

Ordered NiO nanowire arrays embedded in anodic alumina membranes have been prepared by using an electrochemical deposition method. After annealing at 300 °C, the NiO nanowire arrays were characterized using SEM, TEM, SAED, and XRD. SEM and TEM observations reveal that these nanowires are dense, continuous and arranged roughly parallel to one another. XRD and SAED analysis together indicate that these NiO nanowires crystallize with a polycrystalline structure. The optical absorption band gap of NiO nanowire arrays is 3.74 eV, and no obvious blue shift or red shift with respect of that of the bulk NiO can be observed.     

Synthese und Kristallstruktur von Blei(II)‐oxidhalogenid‐Alkoholaten mit unterschiedlichen Verknüpfungsvarianten von Pb4O4‐Heterokubaneinheiten

Synthesis and Crystal Structure Determination of Lead(II) Oxide Halide Alcoholates with Different Connectivity of Pb₄O₄ Heterocubane‐like Subunits The reaction of red lead(II) oxide (Litharge) and lead(II) halide (Cl^? and Br^?) with diethylene glycole at a temperature of 180 °C leads to the isotypic compounds [Pb₆(C₄H₈O₃)O₂Cl₆] (1) and [Pb₆(C₄H₈O₃)O₂Br₆] (2) . In a similar synthesis with PbI₂ as educt at temperature of 160 °C the two modifications β‐[Pb₆(C₄H₈O₃)O₂I₆] (3) and α‐[Pb₆(C₄H₈O₃)O₂I₆] (4) were found, whereas at a reaction temperature of 180 °C [Pb₉(C₂H₄O₂)(C₄H₈O₃)O₃I₈] (5) was surprisingly obtained as product. The X‐ray diffraction data show that at a temperature of 180 °C a splitting of the ether took place. The cited compounds show cubane like subunits built by lead and oxygen atoms. These fragments are connected by alkoholate molecules. In 5 additionally an I₆ octahedra centered by lead is observed.     

七-O-乙酰基-β-乳糖异硫氰酸酯的合成、表征及电化学研究

本文合成了并培养出了七-O-乙酰基—β—乳糖异硫氰酸酯的单晶，用X射线衍射分析了其晶体结构。结果表明，晶体为正交晶系，P2₁2₁2₁空间群，a＝1．23282(7)，b＝1．80012(10)，c＝1.85230(10) nm，α＝β＝γ＝90°，V＝4．1107(4) nm³，Z＝4。电化学实验观测到单链DNA和双链DNA对该化合物的峰电流均有明显降低作用，表明化合物与DNA发生了静电作用。     

Synthesis and biological evaluation of 3-{[4-(4-[18F]fluorophenyl)methyl] piperazin-1-yl}-methyl-1H-pyrrolo[2,3-b]pyridine for in vivo studies of dopamine D4 receptor

The compound 3-{[4-(4-[¹⁸F]fluorophenyl)methyl]piperazin-1-yl}-methyl-1H-pyrrolo[2,3-b]pyridine ([¹⁸F]3), which is an analogue of L-745,870 binding D₄ This revised version was published online in July 2006 with corrections to the Cover Date.     

含二氧杂环异黄酮的合成

本文报道含有3', 4'-亚甲二氧基, 3', 4'-亚乙二氧基, 3, 4'-三亚甲二氧基的异黄酮类化合物的合成, 所得25个新化合物的结构经元素分析、^1H NMR谱确证; 紫外光谱表明有异黄酮特征吸收。文中并对反应机理进行了探讨。     

Fe／ZrO_2气凝胶超细粒子催化剂的制备、表征及F－T反应性能的研究

用超临界流体干燥法制备出大孔高比表面高分散态Ｆｅ／ＺｒＯ_２气凝胶超细粒子催化剂，研究了在其制备过程中织构性质、颗粒大小、体相和表面结构的变化，并与普通浸渍法制备的Ｆｅ／ＺｒＯ_２催化剂作了对比。对几种Ｆｅ／ＺｒＯ_２催化剂的Ｆ－Ｔ反应性能考察表明，Ｆｅ／ＺｅＯ_２气凝胶超细催化剂显示出高的反应活性；随载体ＺｒＯ_２颗粒尺寸减小，活性组分铁的分散度变大，其颗粒尺寸变小，催化剂比表面积增大，反应活性增大，甲烷和低碳烃生成量增加，重质组分减少，认为产物烃分布主要受催化剂活性相颗粒尺寸效应制约。     

Chemical preparation and investigation of Fe-P-B ultrafine amorphous alloy particles

A series of Fe-P-B ultrafine amorphous alloy particles has been prepared by the chemical reduction method The composition and size of the particles have been effectively adjusted.Mossbauer spectroscopy in addition to sonic other techniques has been used to investigate the reaction process,the factors that influence the preparation,the crystallization of the particles,and the interactions between the components within them.The results indicate that the co-deposition of iron,phosphorus and boron atoms in the solution at room temperature forms Fe-P-B amorphous alloy particles,and a preferential bonding of Fe-P bond to Fe-B one exists in the particles.     

新型铕双β-二酮红光材料的合成与发光性质

通过分子设计,合成了一种新颖的双β-二酮有机配体9-乙基-3,6-二（乙酰基-3-苯甲酰基）咔唑（H2L）及其铕配合物,红外光谱和电子光谱表明Eu^3＋与H2L发生配位。配合物的溶液荧光光谱不仅有613 nm处的中心离子Eu^3＋的特征红光,属^5D0→^7F2跃迁带,还有445nm处配体的宽带蓝色发光,属H2L^＊→H2L跃迁带,而配合物的光致发光光谱只有611 nm处为中心离子Eu^3＋的特征红光,属^5D0→^7F2跃迁带,峰形尖锐,半峰宽仅7 nm,单色性好,表明该固体铕双β-二酮配合物是一种潜在的红色发光材料。     

Monitoring myoglobin by capillary zone electrophoresis with end-column amperometric detection

Capillary zone electrophoresis was employed for the determination of myoglobin in human urine using end-column amperometric detection with a carbon fiber microelectrode at a constant potential of 1.80 V vs. saturated calomel electrode (SCF). The optimum conditions of separation and detection are: 3.73 x 10-4 mol/L sodium diethyl malonyl urea (barbitone sodium), 1.34 x 10-4 mol/L HCl for the buffer solution, 20 kV for separation voltage, 5 kV and 5 s for injection voltage and injection time, respectively. The limit of detection is 4.4 x 10-8 mol/L or 84 amole signal to noise (S/N = 2). The relative standard deviation is 2.9% for the migration time and 2.5% for the electrophoretic peak current. The method can be used for the determination of myoglobin in human urine. The samples can be directly injected and need no pretreatment. The method is also rapid, less than 2 min, and has a recovery rate of 94-106%.