烷基二茂铁的合成及性质

电化学性质;燃速催化性;烷基二茂铁的合成及性质     

对苯二甲酸根桥联的双核铬(Ⅱ)配合物的合成与磁性

以对苯二甲酸根（TPHA）为桥联配体,分别端接4,4'－二甲基－2,2'－联化吡啶（Me2bpy),2,9－二甲基－1,10－邻菲啉（Me2phen)和5－毛－1,氯－1,10－邻菲啉（Cl-phen),合成了3种新的双核铬（III）配合物[Cr2-(TPHA)(Me2bpy)4]（NO3）4,[Cr2(TPHA)(Me2phen)4](2)[Cr2(TPHA)(Me2phen)4](3).经元素分析,摩尔电导和磁性测定以及红外光谱和电子光谱等手段,这些配合物具有TPHA桥联双核铬（III）结构,其中,每个铬（III）离子处于畸变八面体配位环境,测定了配合物（1）的变曙磁化率（4－300K）,其数值用最小二乘法和从自旋Hamiltonian算符（H＝－2JS1S2)导出的磁议程 拟合,求得交换积分为－2．98cm^1,结果表明双核配合物中金属离子间存在弱的反铁磁自旋交换作用。     

聚苯胺的合成与性能研究——介绍一个化学综合实验

考察化学法和电化学法两种方法制备的聚苯胺的电化学活性差别;研究聚苯胺的催化性能及气敏性能。通过有关聚苯胺的系列实验学习,让学生了解导电聚合物的性能及其在化学传感器中的应用及前景。     

N-苄基吲哚三碳菁染料的合成及性能

合成了5种N-苄基吲哚三碳菁染料,通过红外光谱、核磁共振氢谱及元素分析确证了其结构,并研究了电子吸收光谱、荧光光谱、光稳定性及溶解度。结果表明,染料溶液和膜的最大吸收波长均为780～830nm;染料在二氯乙烷中的溶解度大于在乙醇中的溶解度;氮原子上苄基的引入极大地改进了染料的光稳定性(与HITCI比较).     

新型卟啉化合物的合成及性质

利用微波反应和模板效应合成了带有苯乙烯撑单元的新型卟啉化合物和锌卟啉配合物. 通过 1H NMR, IR和MALDI-TOF-MS等技术对其结构进行了表征. 通过测定UV-Vis和PL对两种卟啉化合物光学性能进行了研究. 利用TGA和循环伏安法研究了锌卟啉配合物的热稳定性和电化学性质, 并以锌卟啉配合物作为掺杂剂利用蒸镀法制备了电致发光器件, EL谱发射峰位于556 nm.     

Synthesis and Properties of Aryloxy-terminated Polydimethylsiloxanes

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Synthesis and Properties of Nonatungstotricobaltosilicate Isomers

Introduction Recently substituted-type of heteropolyanions has received much attention from the point of view of their catalysis. Hill, Finke, Neumann reported respectively that transition metal mono-substituted heteropolyanions PW_(11) M, P_2W_(17)M and SiW_(11) Ru have an ability to catalyze the epoxidation of olefin. We discovered that trisubstituted Keggin heteropolyanions have this property too. This paper describes the synthesis, properties of α- and β-[SiW_9O_(27)Co_3(H_2O)_3]~(10-) and its catalysis for the epoxidation of olefin by PhIO.     

烷硫基四硫富瓦烯的合成及其性质的研究

分别以 1 ,3,4 ,6-四硫代戊搭烯 -2 ,5-二酮和 4 ,5-二 ( 2′-氰基乙硫基 ) -1 ,3-二硫杂环戊烯 -2 -酮为原料 ,经偶联、醇解、烃化制得四甲硫基四硫富瓦烯和四乙硫基四硫富瓦烯。对两种方法制得产物的产率存在较大差别提出了合理的解释 ,并讨论了 2种四硫富瓦烯衍生物的循环伏安图及有关电化学性质。     

Synthesis and Properties of Porphyrin Nanotubes

Discrete π‐conjugated zinc porphyrin nanotubes are investigated as molecular analogues of carbon nanotubes. These porphyrin nanotubes have a diameter of 2.4 nm (Zn–Zn distance) and lengths of up to 3.6 nm, measured to the van der Waals surfaces of the outer β‐pyrrole hydrogen atoms, or 4.5 nm measured to the para hydrogen atoms of the aryl groups. We explore three different strategies for synthesizing these nanotubes. The first two strategies use a template to achieve direct or sequential stave‐joining, respectively, and proceed via linear oligomers that pre‐define the length of the nanotube. These strategies are applied to synthesize porphyrin nanotubes containing 12‐ or 18‐porphyrin subunits, with ethynylene (C₂) or butadiynylene (C₄) links between the 6‐porphyrin nanorings. The third strategy involves the covalent stacking of pre‐formed 6‐porphyrin nanorings to form a 12‐porphyrin nanotube, without using a template to guide this coupling reaction. The nanotubes show strongly red‐shifted absorption spectra and low fluorescence quantum yields, indicating structural rigidity and extensive π‐conjugation.     

芳氧端基的聚二甲基硅氧烷

通过酚类与六甲基环三硅氧烷（Ｄ３）的调聚反应，首先合成了一类含芳氧端基的聚二甲基硅氧烷（ＡＯＳ）．采用ＵＶ、ＩＲ、１ＨＮＭＲ、元素分析、分子量测定等方法，确证了所合成聚合物的结构．讨论了反应试剂摩尔比和反应条件对调聚产物分子量的影响；研究了ＡＯＳ的结构与杀菌功能、絮凝作用以及水解速度的关系．     

PMMA-b-QPDMAEMA的合成及其抗菌活性

以α-溴代丙酸乙酯为引发剂,CuCl/二乙烯三胺为催化剂,采用ATRP法制得5个不同分子量的聚甲基丙烯酸甲酯-聚甲基丙烯酸二甲氨乙酯嵌段共聚物(PMMA-b-PDMAEMA, P¹~P⁵); P¹~P⁵经溴代辛烷季铵化合成了5个聚季铵盐(Q¹~Q⁵),其结构和性能经¹H NMR, FT-IR, GPC和DSC表征。结果表明：P⁴和Q⁴的玻璃化转变温度分别为109.67 ℃和117.95 ℃。采用平板活菌计数法研究了Q¹~Q⁵对金黄色葡萄球菌(S. aureus)和大肠杆菌(E. coli)的抗菌活性。结果表明：Q¹~Q⁵对S. aureus的抗菌活性优于E. coli,其MIC值分别为300 mg·L^-1, 250 mg·L^-1, 275 mg·L^-1, 225 mg·L^-1和150 mg·L^-1。     

Synthesis and Properties of Dendronized Chitosan

Summary: Chitosan films and microspheres were prepared and their surfaces were functionalized with first generation dendritic molecules. The films were modified by Weisocyanate dendron, while Behera's and bis Behera's amine dendrons were used to modify the microspheres. Prior to dendronization films were prepared by blending chitosan with 18% of polyvinyl pyrrolidone (PVP), and casting the resulting mixture. The degree of dendronization reached was 28%. The microspheres were prepared by coacervation/precipitation, after which the surfaces were activated with either epychlorohydrine (ECH) or 1,4-butanediol diglycidyl ether (BDGE). The oxirane groups were utilized to form covalent bonds between chitosan and dendrons. The degree of dendronization yielded with Behera's amine was 60% for both activating agents. When bis Behera's amine was used, the dendronization reached values of 15 and 21% when ECH or BDGE were used, respectively. The dendronized products were characterized through spectroscopic and microscopic studies and by determination of swelling indexes. Only one of the surfaces was dendronized in every film, which therefore presented a hydrophobic and a hydrophilic surface. Since these films maintain the properties of chitosan, they offer interesting potential as dressings for exuding wounds. The different surfaces make the microspheres potentially applicable as carriers for delivery and controlled release of drugs.     

Synthesis and Properties of PGS-Li Scaffold

Lithium ion-doped polyglycerol sebacate scaffold(PGS)-Li was synthesized by adding lithium ions to polyglycerol sebacate(PGS) during its crosslinking process due to the specific effects of lithium ions on periodontal ligament cells, cementoblasts and the eminent performance of PGS. The molecular mass, composition, structure, porosity, thermal properties, and hydrophilicity of the composite were characterized by gel permeation chromatography(GPC), Fourier transform infrared spectroscopy(FTIR), inductively coupled plasma optical emission spectrometer(ICP-OES), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), thermogravimetric analyzer(TGA) and contact angle measurments, and the degradation of the material was evaluated by in vitro degradation experiments. The biological activity of PGS-Li scaffold was detected by calcein-AM staining and cytotoxicity test. The results indicate that PGS-Li scaffold has been successfully synthesized, which has similar composition and structure to PGS, but slightly larger molecular weight. In addition, the porosity and pore size of PGS-Li scaffold ba-sically meet the requirements of engineering scaffold materials and the seaffold shows better performance in terms of hydrophilicity and thermal stability than PGS. In vitro degradation experimental results show that the degradation rate of PGS-Li scaffold is higher than that of PGS. What's more, the results of cytotoxicity test and cell staining show that there is no significant difference in the proliferation and cell morphology of cementoblasts.     

磁流变体的制备及性能

对以羰基铁粉、硅油和烃类油为悬浮相和悬浮介质,通过适当添加剂和工艺制备的磁流变体材料,制备方法、磁流变性能及影响因素进行了研究,认为是具有良好综合性能的磁流变体材料.制备的磁流变体具有较低的零场粘度(0.4～1.5 Pa s),较高的剪切应力(τ=50～75 kPa)和良好的稳定性及阻尼性能.     

1,2,3—二氮磷杂环戊二烯类化合物的合成及性质

合成了2-乙酰基-1,2,3-二氮磷杂环戊二烯类系列化合物,用~1H、~(13)C、~(31)P NMR和MS确定了其结构,讨论了结构和NMR谱间的关系。     

亚酞菁的合成及其光谱性质

亚酞菁是由 3个异吲哚联接 (酞菁是由 4个异吲哚联接 ) ,整个分子呈现出锥形结构[1] .尽管亚酞菁不是平面型分子 ,但它表现出离域的 1 4π电子体系 ,有芳香性 [2 ]而且化学稳定性、热稳定性好 ,也具有非线性光学性质等与酞菁类似的性质 [3 ] .虽然亚酞菁很早就合成出来 ,但有关它的光学及其它性质的研究仍然较少 ,直到 90年代才开始报道 ,其主要原因是提纯非常困难 ,甚至现在许多已报道的合成路线都难以重现 ,因为许多亚酞菁溶解度较差 .人们主要利用亚酞菁来合成不对称酞菁 [4 ] .应用亚酞菁可作有机光导体 [5] ,有机电致发光材料 [6] ,光…     

H型聚合物的合成及性质

H型聚合物是一种具有轻度支化拓扑结构的高分子,通常具有不同于线型、星型和超支化聚合物的流变性能、本体和溶液组装性能。由于H型聚合物的合成较为复杂,一直以来,科研工作者的工作重点均集中于如何精确合成与构筑,性能研究较为有限。本文根据H型聚合物构筑段的不同从H型均聚物、二元共聚物、三元共聚物、五元共聚物以及其他H型聚合物的合成及性质方面进行了总结和评述,并在此基础上展望了H型聚合物的研究方向和发展趋势。     

去甲去氢斑蝥素酰亚胺缩水杨醛的合成及其性质研究

以呋喃、水合肼和马来酸酐为原料,合成了去甲去氢斑蝥素酰亚胺缩水杨醛,其结构经NMR、MS和元素分析证实,并测定了产物的抑菌活性及与牛血清蛋白(BSA)的相互作用。结果表明,标题化合物对大肠杆菌和金黄色葡萄球菌都有较好的抑菌活性,其对BSA为静态荧光猝灭,在293、303和310 K时猝灭常数分别是3.39×10~4、3.29×10~4和3.13×10~4(L/mol);化合物与BSA主要通过疏水作用力结合,其结合距离为2.688nm,结合位点数为1.049(303K)。     

杯芳烃-卟啉化合物的合成及性质

杯芳烃和卟啉通过共价键连结或者分子间作用力聚集形成的杯芳烃-卟啉化合物在分子识别、分子催化、分子自组装等方面有潜在的用途. 本工作综述了杯芳烃-卟啉化合物的合成及性质.     

Synthesis and Properties of Organomineral Sorbents

Composite sorbents including an active inorganic component and a polymeric binder were obtained. The effect of various factors on their sorption and strength properties was studied.