Synthesis and crystal structure of a new one-dimensional system with end-to-end single dicyanamide bridges between nickel(II) centres

The complex [Ni(tn)₂{N(CN)₂}]ClO₄ (tn=trimethylenediamine) has been synthesized and the structure has been determined. The complex forms a one-dimensional chain structure via the bidentate bridging ligand dicyanamide. A two-dimensional networks is formed via interchain hydrogen bond interactions.     

热谱重建法及其在热动力学研究中的应用

在热动力学研究中,大多数实验是在热导式热量计中进行的。由于量热系统的热惯性,记录得到的热谱会出现“失真”,为了正确方便地分析被研究过程的动力学性质,必须对所得热谱进行改造或重建。本文系统地提出了一种新的重建法,即热谱重建法。实验结果表明,该法可广泛应用于热动力学研究。     

纤维声速仪的简化

测定纤维中分子键取向度的声速仪见前文。作者等鉴于仪器将会得到更广泛的应用,特将声速仪中的直流电源、脉冲讯号发生器及多谐振蕩器与放大器等三件仪器簡化;針对它們的基本原理設計一台声波触发器取而代之。     

5-氨基-1,3-二氢-1,3-二氧-异吲哚-2-丙酸类衍生物的合成及抗血管生成活性研究

根据RGD序列肽的构效关系, 设计并合成了一系列以5-氨基-1,3-二氢-1,3-二氧-异吲哚-2-丙酸为分子骨架的新化合物. 其中间体和目标物的化学结构经¹H NMR, MS和元素分析确证. 体外初步生物活性筛选结果表明, 目标物在10^－5 mol/L浓度下对bFGF诱导的鸡胚绒毛尿囊膜新生血管生成有显著抑制活性.     

电化学超级电容器电极材料的研究进展

回顾了电化学超级电容器电极材料的研究进展，并对不同电极材料的储能原理和性能特点进行了简要的阐述。参考文献29篇。     

纳米Zn-Co铁氧体的固相合成及电磁损耗特性研究

采用NH₄HCO₃与FeCl₃·6H₂O，Zn(NO₃)₂·6H₂O，Co(NO₃)₂·6H₂O进行室温固相反应制得前驱物，经微波加热处理后，进而热分解分别制得复合氧化物ZnFe₂O₄、CoFe₂O₄和Co_0.5Zn_0.5Fe₂O₄。由激光粒度分析仪、XRD和SEM表征：获得了颗粒分布比较均一、平均粒度为65 nm左右、立方晶系尖晶石结构的纳米铁氧体粉体。经测试样品的相对介电常数和相对磁导率后，研究了它们的电磁损耗特性。结果表明：Co_0.5Zn_0.5Fe₂O₄在100～1 800 MHz内比另外两种铁氧体具有更好的电磁损耗特性。     

Synthesis and Crystal Structure of N-（1-Phenyl-3-methyl-4-benzal-pyrazolone-5）-furoic Hydrazide

1 INTRODUCTION In recent years, investigations on the com- pounds containing hydrazide or hydrazone moieties have been increased considerably because of their potentially biological activities, especially as poten- tial inhibitors for many enzymes[1～5]. The presence of weak molecular interactions such as hydrogen- bonding controls the conformational and structural features which are important to the drug action[6, 7]. We have synthesized the photochromic compounds of pyrazolone thiosemi…     

Transfer Hydrogenation of C= C Double Bonds Catalyzed by Ruthenium Amido-Complexes: Scopes, Limitation and Enantioselectivity

The reduction of C = C double bonds is one of the most fundamental synthetic transformations and plays a key role in the manufacturing of a wide variety of bulk and fine chemicals. Hydrogenation of olefinic substrates can be achieved readily with molecular hydrogen in many cases, but transfer hydrogenation methods using suitable donor molecules such as formic acid or alcohols are receiving increasing attention as possible synthetic alternatives because it requires no special equipment and avoids the handling of potentially hazardous gaseous hydrogen.