Über die Proliferationsfähigkeit hochvernetzter glasiger Polymerer

Zusammenfassung Die Modifizierung hochvernetzter Styrol—Divinylbenzolcopolymerisate durch Zusatz von Verdünnungsmitteln bei der Polymerisation führt zur Bildung proliferationsfähiger Polymerer. Es besteht ein enger optimaler Zusammensetzungsbereich. Der Zusammenhang der Proliferationsfähigkeit mit Gleichgewichtsquellung, permanenter Porosität und Gehalt an anhängenden Doppelbindungen wird untersucht; die Morphologie des Proliferationsprozesses wird in mikrokinematographischen Zeitrafferaufnahmen festgehalten.

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The modification of highly crosslinked styrene—divinylbenzene copolymers by adding diluents to the polymerizing system yields polymers showing proliferous polymerization. There exists an optimum concentration range of diluent. The correlation of proliferous polymerization to equilibrium swelling, permanent porosity, and content of pendent double bonds is investigated. The morphology of the proliferation process is observed in micro time lapse motion pictures.

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Mit 10 Abbildungen     

The structure and magnetic properties of μ3-oxotriiron(III) complex [Fe3O(OBz)6(CH3OH)3](NO3)(CH3OH)2

A new μ₃-O triiron(III) complex [Fe₃O(OBz)₆(CH₃OH)₃](NO₃)(CH₃OH)₂ (HOBZ = benzoic acid) has been synthesized, its structure has been determined and variable temperature magnetic susceptility has also been measured. In the molecule, three iron atoms formed an equilateral triangle with μ₃-O in center. The fitting to the magnetic susceptibility showed that an intramolecular antiferromagnetic exchange interaction occurred between iron atoms with J=-25.51 cm^?1, and a weaker intermolecular autiferromagnetic exchange interaction occurred with zJ' = ?2.30 cm^?1.     

大孔吸附树脂负载氢氧化锰作催化剂空气氧化水中硫化物的研究

采用ＮＫＡ２型大孔吸附树脂负载氢氧化锰作催化剂，研究模拟水样中硫化物的空气氧化过程和影响因素，并对煤气和焦化工业含硫废水进行氧化试验．结果表明，在ｐＨ９～１１和不低于３０℃的条件下，浓度６３０～３８００ｍｇ／ｌ的Ｓ２－可在１～３小时内达到９９％的氧化率，树脂负载催化剂可重复使用．     

2-硝基丙烯热解反应的理论研究

利用MO-AM1方法研究了2-硝基丙烯热解的反应途径。结果表明, 2-硝基丙烯可能首先热解产生一个四元环状中间体。该中间体依照分步过程继续分解时, 存在两种可能的途径, 其中先断N—O键的反应过程比先断C—C键的过程从能量上更为有利。反应过程中电荷无明显转移, 具有双自由基反应特点。     

12-钼磷酸与γ-Al2O3载体的相互作用

应用酸碱滴定、X射线衍射(XRD)、激光拉曼(LRS)和顺磁共振(EPR)等方法研究了磷钼酸(PMo_(12))与γ-Al_2O_3载体间的相互作用．结果表明，PMo_(12)在γ-Al_2O_3上随负载量增加出现三种不同的分散状态，据此提出了PMo_(12)在γ-Al_2O_3上的铺展模型．     

钯（Ⅱ）—组氨酸络合物极谱波的研究

本用极谱法研究了Ｐｄ（Ⅱ）－组氨酸络合物波的形成条件和性质，用线性法和连续变化法确定了Ｐｄ（Ⅱ）与组氨酸的络合物比为１：２，络合物的稳定常数β为３．４７×１０＾１９。测定钯的线性范围为０．０２～０．７μｇ／ｍｌ。     

Iridoid,phenylethanoid and flavonoid glycosides from Forsythia suspensa

Abstract

As part of our continuing efforts to explore bioactive compounds from natural resources, a new iridoid glycoside, adoxosidic acid-6′-oleuroperic ester (1), together with one known phenylethanoid glycoside (2) and two known flavonoid glycosides (3–4) were isolated from the fruit of Forsythia suspensa. The structure of the new compound (1) was elucidated through 1D and 2D NMR spectroscopic data and HR-ESIMS. Interestingly, compound 1 was a monoterpene ester of one iridoid glycoside. Compounds 2–4 were identified as calceolarioside A (2), kaempferol-3-O-rutinoside (3), kampferol-3-O-robinobioside (4) on the basis of NMR spectroscopic data analyses and comparison with the data reported in the literature. The antiviral activity aganisist influenza A (H5N1) virus of compound 1 was studied as well.     

一种新型有机质子响应荧光分子的合成在实验教学中的设计与探索

本实验将最新的科研热点——有机发光材料引入实验教学,开发了基于一个荧光分子二甲氨基苯乙烯基苯并噁唑的合成实验,并考查了其质子响应性质。本实验反应温和易控,操作简单,现象明显,绿色环保,并且可以用于模块化教学,拆分成多个环节实验,适合不同学时的实验教学要求,既可培养学生的基本操作,又能激发学生的实验兴趣,锻炼学生的综合能力。