γ—芳亚甲氨基丙基杂氮硅三环的合成及其抗肿瘤活性研究

γ-氨基丙基杂氮硅三环与一系列芳香醛反应,合成了14种γ-芳亚甲氨基丙基杂氮硅三环化合物。用~1H NMR、IR、UV和元素分析确定了它们的化学结构。初步动物实验表明,某些化合物具有一定的抗肿瘤活性。     

1-芳氨基丙基杂氮硅三环的合成及生物活性

有机硅化合物;1-芳氨基丙基杂氮硅三环的合成及生物活性     

1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷衍生物的合成及其抗肿瘤活性研究

通过1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷与酸反应或1-(3-氯丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷与胺反应,合成了14种1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷衍生物.体外细胞培养试验结果表明,某些1-(3-氨基丙基)-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷衍生物对艾氏腹水癌细胞具有较好的杀伤活性.     

杂氮硅三环侧链上基团转换反应的研究

2,8,9-三氧杂-5-氮杂-1-硅双环[3,3,3]十一碳烷(简称杂氮硅三环)是一类具有五配位键的有机硅化合物。有关它的合成方法和其物理化学性质,文献中已报道甚多。但有关硅三环上与硅侧链相连接的有机基团的转换反应或其它反应研究的还很不够。我们认为进行这方面工作是很有意义的,因为一般硅三环都是从相应的三烷氧基硅烷与三乙醇胺反应制得。如果能从一种硅三环开始进行基团转換来得到一系列其它基团的硅三环,这就为这一类化合物的合成提供新路线。与此同时,还可研究硅三环在各种合成条件     

1-(3-芳亚甲基氨基)丙基-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷金属络合物的合成及其抗肿瘤活性研究

我们曾对1-亚甲基氨基烷基-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷的合成及其抗肿瘤活性作过研究,发现1-[3-(2-羟基苯亚甲基氨基)丙基]-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷和1-[3-(2,4-二羟基苯亚甲基氨基)丙基]-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷具有较好的抗肿瘤活性。已知亚甲胺类(Schiff碱)化合物与某些金属离子形成络合物后,能提高它们的抗肿瘤活性。为此,我们进一步研究了这两种亚甲胺衍生物的合成及其抗肿瘤活性。     

1-芳氧基杂氮硅三环的合成

杂氮硅三环由于具有高的生物活性而受到人们的重视,作者们曾报道了一系列杂氮硅三环的合成方法,化学结构及生物活性。最近有文献报道1-芳氧基杂氮硅三环有强的抗菌作用。我们将这类硅三环为研究对象,通过在三环骨架上引入甲基来探讨环骨架的改变对硅氮配键及生物活性的影响。1-芳氧基杂氮硅三环的合成前人曾作过简单地报道,但有关不同环骨架的1-芳氧基杂氮硅三环的报告目前还未见到。在我们最初改变环骨架的尝试中只得到了高聚物,这是     

胺类杂氮硅三环化合物红外光谱研究

对γ－氨丙基杂氮硅三环，γ－乙二胺基丙基杂的氮硅三环，γ－乙二撑三胺基丙基杂质硅三环３种化合物的红外光谱进行了研究，胺基的特征吸收为：伸缩振动υａｓ（ＮＨ）和υｓ（ＮＨ）；剪式振动δ（ＮＨ２）。三环的特征吸收为：ＣＨ２的弯曲振动ω（ＣＨ２Ｎ）ω（ＣＨ２Ｏ）和τ（ＣＨ２Ｏ）；Ｃ－Ｏ键的伸缩振动υ（Ｃ－Ｏ）；Ｎ－Ｃ键的伸缩振动υ（ＮＣ３）和υ（ＮＣ３），Ｓｉ－Ｏ键的伸缩振动υ（Ｓｉ－Ｏ）和υ（Ｓｉ－Ｏ     

二氧化硅固载硫、氮杂冠醚铂配合物的合成及其催化烯烃硅氢化性能

二(β-氯乙基)烯丙胺与3,6-二氧杂辛-1,8-二硫醇在乙醇钠存在下关环缩合,得到具有烯基侧链的1,7-二硫杂-10,13-二氧杂-4-氮杂-4-烯丙基环十五烷.后者通过硅氢加成、二氧化硅固载.再与氯亚铂酸钾反应,合成了一种新型有机硅聚合物负载硫、氮杂冠醚及其铂配合物.该配合物对于烯烃硅氢加成反应具有良好的催化性能.     

γ-取代丙基环四硅氧烷的合成及其与D_4的乳液共聚反应

本文合成了四种γ-取代丙基环四硅氧烷。通过阳离子型和阴离子型乳液共聚的方法,分别使其与八甲基环四硅氧烷共聚,合成了含有γ-羟丙基、γ-氯丙基和γ-乙酰氧丙基等活性碳官能团有机硅聚合物的稳定乳液;研究了乳液共聚反应过程中的单体转化率、聚合物分子量的变化以及温度、催化剂、乳化剂、取代基团等因素的影响。     

胺类杂氮硅三环化合物红外光谱研究

对γ－氨丙基杂氮硅三环、γ－乙二胺基丙基杂氮硅三环、γ－乙二撑三胺基丙基杂氮硅三环３种化合物的红外光谱进行了研究。胺基的特征吸收为：伸缩振动ｖ_（ａｓ）（ＮＨ）和ｖ_ｓ（ＮＨ）；剪式振动δ（ＮＨ_２）。三环的特征吸收为：ＣＨ_２的弯曲振动ω（ＣＨ_２Ｎ）、ω（ＣＨ_２Ｏ）和τ（ＣＨ_２Ｏ）；Ｃ－Ｏ键的伸缩振动ｖ（Ｃ－Ｏ）；Ｎ－Ｃ键的伸缩振动ｖ_（ａｓ）（ＮＣ_３）和ｖ_ｓ（ＮＣ_３）；Ｓｉ－Ｏ键的伸缩振动ｖ_（ａｓ）（Ｓｉ－Ｏ）和ｖ_ｓ（Ｓｉ－Ｏ）；Ｃ－Ｃ键的伸缩振动ｖ（Ｃ－Ｃ）；以及Ｓｉ←Ｎ配键的伸缩振动ｖ（Ｓｉ←Ｎ）。     

HEPT类化合物的QSAR研究

为定量结构／活性相关性研究提取了量子化学参数,拓扑指数Am,分子连接性指数^mxt及疏水性常数,同时应用正交变换和最佳变量子集算法（Leaps-and-Bonds)进行了变量压缩和选择,进而实施了多元回归分析,并由此结果进行了HEPT类化合物（1－[(2-hydroxyethoxy)methyl]-6-(phenylthio)-thymine derivatives)的结构／活性关系的理论解释,进行了人工神经网络法对于该类化合物的活性预测,其结构明显好于多元回归法。     

From the Micro- to the Macro-: Managing the Conservation of the Warship,Vasa

Sweden's famous warship, Vasa, sank on her maiden voyage in August 1628, and remained on the bottom of Stockholm harbour for 333 years. Raised in 1961, she became the first large-scale wooden object to be treated with polyethylene glycol (PEG). In the summer of 2000 a number of acidic salt precipitations were noticed on the surface of the ship and on wooden artefacts in the storerooms. An international research project has been established to look into the causes of this problem and suggest possible re-treatments. Meanwhile projects are underway to monitor movements in the ship, to build a better support system, and to replace the thousands of iron bolts holding the structure together, while a sophisticated new climate system has recently been installed in the museum.     

液滴荧光传感与计算机联用技术在微量分析中的应用

通过在LS55型荧光-磷光-发光分光光度计上加装液滴产生及调节附件,采用计算机采集与分析处理数据,成功地研制了双通道液滴光化学传感装置.利用葡聚糖凝胶对复合维生素B中不同组分的选择性吸附来达到分离与同时检测的目的,并将其用于复合维生素B药片的分析,取得了满意的结果.     

明朝迁都北京与多民族国家治理

明朝建立后,面对多民族国家治理的新格局,定都问题一直是困扰朱元璋君臣的一大难题。终洪武之世,朱元璋也未能解决迁都的问题。燕王朱棣称帝后,将北平改为北京,条件具备后迅速将京师从南京迁到北京。成祖去世之后,虽有短暂的反复,但英宗即位不久,宣布定都北京,从此北京成为明朝永久的都城。迁都北京是明朝主动适应唐以后多民族交融局面的具体表现,一方面可以有效应对元朝残余的侵扰,另一方面能够整合农耕和游牧两大区域,为中国多民族国家治理做出了积极的贡献,意义重大。     

On the scaling of the interface energy of the liquid clusters in the disordered nanoporous medium

Similarity of the extrusion curves of non-wetting liquid in a nanoporous medium with different initial fill volume fractions is observed experimentally. The similarity can be explained by the scaling of the interface energy and the self-similarity of the infinite percolation cluster of fluid-filled pores. Understanding the physical processes leading to the observed phenomena is a foundation for the development of high-performance devices for damping and energy storage on the basis of such heterogeneous systems.     

Using of the Agglomeration-in-liquid for the Technology of the Fine Materials

The content of the fine and ultrafine particles in the raw material results in difficulty of the separation, the loss of the valuable components and ecological contamination. Secondary using of the fine particles is impossible without their granulation. This problem has been solved by the agglomeration-in-liquid method.An agglomeration-in-liquid method is a process to produce agglomerates in a liquid phase from solid particles suspended in the liquid. The surface of solid particles and the binding liquid must be of identical polarity, but the continuous phase must be of the opposite polarity. The water solutions of the surfactant are the binding liquids or the organic liquids.     

On the quality of the hardness kernel and the Fukui function to evaluate the global hardness

An approximated hardness kernel, which includes the second derivative with respect to the density of the kinetic energy, the electron-electron coulomb repulsion, and the exchange density functionals, has been tested for the calculation of the global hardness. The results obtained for a series of 40 cations and neutral systems and 16 anions represent in most cases an improvement of the results obtained using the HOMO-LUMO gap approach and indicate the viability of this approach to evaluate global hardness. In addition, the relevance of the Fukui function approximation and the role of the three components of the hardness kernel in the evaluation of the global hardness have been analyzed.     

Copper-containing dendromesogens: the influence of the metal on the mesomorphism

The synthesis and liquid crystalline behaviour of the first and second generations of a dendrimeric structure based on poly(propyleneimine)(DAB-dendr(NH₂)_x) are reported. 4-(4-n-Alkoxybenzoyloxy)salicylaldehydes are used as mesogenic moieties attached at the peripheral amino groups of the dendrimers giving rise to dendromesogens with four and eight mesogenic branches. From these dendromesogens, considered as organic ligands, were prepared six metal-containing dendrimers which incorporate two or four copper atoms in their structures. All the dendrimeric ligands and three of the metal-containing dendrimers exhibit liquid crystalline properties which were studied by optical microscopy, DSC, X-ray diffraction and EPR spectroscopy.     

Influence of the Position of the Connecting Spacer of the Chromophore on the Nonlinear Optical Response

A new chromophore, C1 , based on a similar DπA‐structure as in the FTC ‐chromophore but with a hydroxyalkyl spacer perpendicular to the direction of the dipole moment was synthesized. Both chromophores and the CLD ‐chromophore were used to prepare high T_g nonlinear optical vinyl polymers. The influence of the position of the spacer on the DπA‐system on the NLO response of the resulting polymers was investigated.