双核铜簇合物[Cu2(dmpytaa)4(CH3OH)2]·3CH3OH的合成、结构及其表征

合成了一个新的4,6-二甲基-2-嘧啶硫乙酸与铜的双核簇合物[Cu2(dmpytaa)4(CH3OH)2]·3CH3OH(Hdmpytaa=4,6二甲基2嘧啶硫乙酸),通过X射线衍射、红外光谱、紫外光谱、热重分析对其进行了结构表征。该晶体属于三斜晶系,空间群P1-,晶胞参数:a=509(3),b=13.526(3),c=15.396(3),α=70.68(3)°,β=68.82(3)°,γ=88.73(3)°,V=2460.3(9)3,μ=1.100mm-1,Dc=1.453gcm3,F(000)=1120,R=0.0537,wR=0.1227(I>2σ(I)),6942个可观察衍射点。该双核分子中两个中心金属Cu原子均处于扭曲的八面体构型中心,并分别与来自四个不同羧酸配体上的羧基氧原子,一个溶剂甲醇分子中的氧原子,以及相邻的一个Cu原子配位。     

疏水性多糖的合成及荧光法研究其在水中的自聚集行为

由胆固醇与１,６－已二异氰酸酯反应合成了１,６－已二异氰酸酯胆固醇单脂（Ｉ）,然后通过葡聚糖与（Ｉ）反应合成了具有自聚集性质的葡聚糖,测得葡聚糖主链上每１００个糖环含有３－５个胆固醇。我们采用探针式超声波来制得胆固醇修饰葡聚糖「ＣＨＤ」的水溶液,同时用Ｎ－苯基－α－萘胺「ＰＮＡ」作为荧光探针来研究ＣＨＤ自聚集过程。在实验中我们发现,每一种葡聚糖溶液,都存在着一个临界浓度。在此浓度之上,ＰＮＡ的荧光     

类风湿因子（RF）免疫吸附剂的制备及性能研究

以球形纤维素为载体,经环氧氯丙烷活化后键联活性配基热聚人IgG,制备类风湿因子（RF）免疫吸附剂,可望用于血液灌流治疗类风湿关节炎。研究了配基的固定化条件及吸附剂的吸附性能。实验结果表明,吸附剂对IgGRF、IgMRF、IgARF的吸附率分别达到69.6%、70.3%、77.0%。     

1,4-双(4-吡啶基甲基苯基醚)(C18H18N2O2)与SCN^-形 成的超分子化合物[H2 (C18H18N2O2)](SCN)2的合成、结构 及其在溶液中的三阶非线性光学性质

超分子化合物[H2(C18H18N2O2)](SCN)由Fe(NO3)3·9H2O,KSCN和1,4-双(4-吡啶基甲基苯基醚)反应得到。通过X射线衍射仪测得该化合物是通过N┈H—N,S┈H—C(C5H5N)及S┈H—C(亚甲基CH2)三种氢键而形成的二维平面网状结构。用Z扫描法对该超分子在DMF溶液中的三阶非线性光学性质进行研究,发现它具有强的三阶非线性折射性能,三阶非线性超极化率X^(3)=6.27×10^-12esu.     

Syntheses, structures, and electrochemical properties of four complexes based on 4-ferrocenylbutyrate ligand

Four ferrocenyl complexes with the formulas {[Mn(η²-OOC(CH₂)₃Fc)₂(bbbm)]·CH₃OH}_n (1), {[Co(OOC(CH₂)₃Fc)(η²-OOC(CH₂)₃Fc)(bbbm)]·CH₃OH}_n (2), {[Ni(OOC(CH₂)₃Fc)₂(bbbm)(CH₃OH)₂]·2CH₃OH}_n (3) and [Pb₆(μ₂-OOC(CH₂)₃Fc)₂(μ₃-OOC(CH₂)₃Fc)₂(μ₂-η²-OOC(CH₂)₃Fc)₂(η²-OOC(CH₂)₃Fc)₂(μ₄-O)₂] (4) (Fc = (η⁵-C₅H₅)Fe(η⁵-C₅H₄), bbbm = 1,1-(1,4-butanediyl)bis-1H-benzimidazole) have been synthesized and characterized by single crystal X-ray diffraction. Owing to the different conformations of the bbbm units in complexes 1 (or 2) and 3, complexes 1 and 2 possess 1D helical chain structure with 2₁ screw axes along the b-direction, while complex 3 shows a 1D linear chain structure with ferrocenylbutyrate groups hanging on the chain. Complex 4 is a hexanuclear complex and exhibits a nano-scale wheel-like framework with six Pb(II) ions as a core and eight 4-ferrocenylbutyrate ligands as branches. The cyclic voltammetric studies show that the formal potentials of the four complexes are close to the free ferrocenylbutyrate ligand, which indicates that the coordination of the metal ions to the ferrocenyl ligand does not have significant effects on the redox potential of the ferrocenylbutyrate ligand. Further investigations suggest that the redox processes of the ferrocenylbutyrate ligand and complexes 1-4 are all chemically quasi-reversible processes and controlled by diffusion.     

电场线的三维演示新方法

本文采用多根细丝线附在带电导体上的方法，来演示电场线。其优点是所演示的电场线的空间性强，可以比较形象地演示出带电导体在空间中的电场线分布。     

多聚磷酸吡哆醛血红蛋白的制备及性质研究

血红蛋白是利用不等渗裂解法从人的全血中提取得到的．在不同的温度和无氧条件下，用磷酸吡哆醛修饰血红蛋白，它们的摩尔比为４：１．随后用戊二醛在４℃，ｐＨ７．４条件下交联磷酸吡哆醛化血红蛋白，获得多聚磷酸吡哆醛血红蛋白．ＳＤＳ－ＰＡＧＥ显示了交联前后血红蛋白的分子量的变化。凝胶层析得到修饰交联后的血红蛋白的分子量分布是一个连续的整体，约从６万到６０万道尔顿之间．多聚磷酸吡哆醛血红蛋白溶液是一个可溶的有载氧能力的溶液，它的Ｐ５０在２０～２６ｍｍＨｇ之间．     

聚乙二醇对人血清IgG的化学修饰及修饰后性质的研究

本文以三聚氯氰为活化剂，单甲氧基聚乙二醇（ＰＥＧ）５０００为载体，对人血清免疫球蛋白Ｇ（ＩｇＧ）进行化学修饰，修饰ＩｇＧ与未修饰ＩｇＧ比较，随修饰度的增高，分子量增加，保留活性降低，对温度及ｐＨ的耐受性增加，抗原性及免疫原性明显下降，ＩｇＧ的骨架结构在修饰前后无明显变化。     

VD—1A型X射线衍射仪高压系统的故障分析及排除

本文以三个故障实例详细地叙述了岛津VD-1A型X射线衍射仪高压系统的故障分析和排除方法。     

Synthesis,crystal structure and magnetic property of a three-dimensional cagelike polymer [Co(4,4′-bpy)(NCS)<Subscript>2</Subscript>(py)<Subscript>2</Subscript>](inn)

A new organic-inorganic hetero-coordination polymer with three different kinds of ligands [Co(4,4′-bpy)(NCS)₂(py)₂]_n is synthesized in the extremely mild condition. The X-ray diffraction reveals that the title polymer has a highly tactic three-dimensional cagelike supramolecular structure. Although the coordination bond makes it a one-dimension chain, the hydrogen bond plays an important role in the formation of 3-D supramolecular frameworks. The determination of magnetic properties has been carried out, and shows that it behaves weak antiferromagnetic property with J _{4,4′ -bpy} = -3.8cm^-1.