水溶性荧光高分子乙烯基咔唑－丙烯酸共聚物的合成及荧光测试

用偶氮二异丁腈作引发剂，使Ｎ－乙烯基咔唑和丙烯酸甲酯在苯中共聚合，该共聚物在四氢呋喃中用氢氧化钠水溶液水解，得到水溶性乙烯基咔唑－丙烯酸共聚物。该共聚物的水溶液在３７３ｎｍ处产生较强的荧光，其荧光强度随溶液ｐＨ值增大而增强，在该高分子水溶液中，加入少量阳离子表面活性剂，其量子产率可提高７倍，微量重金属离子（Ｈｇ（２＋））对荧光有一定的熄灭作用。荧光强度（ｌｏｇＩ０／Ｉ）与Ｈｇ（２＋）的浓度呈线性关系。     

亲水性咔唑共聚物和钼簇合物之间的作用及其溶液荧光

研究了Ｎ－乙烯基咔唑－丙烯酸共聚物（ＮＶＣ－ＡＡ）和微量的钼簇合物「Ｍｏ３Ｏ２（Ｏ２ＣＣＨ３）６（Ｈ２Ｏ）３」Ｂｒ２．２Ｈ２Ｏ在水溶液相互作用及其溶液荧光。实验发现,体系中存在单体荧光（３７５ｎｍ）和二聚体激态缔合物荧光（５００ｎｍ）。荧光强度分别随钼簇合物的浓度啬和ｐＨ值的提高而增强。     

含咔唑高分子水溶液的室温磷光

含咔唑高分子水溶液的室温磷光博日吉汗·格日勒图，印杰（内蒙古师范大学化学系，呼和浩持，０１００２２）（上海交通大学应用化学系）关键词磷光，铊离子，Ｎ－乙烯基咔唑－丙烯酸共聚物芳香族化合物吸收辐射后可在室温发射荧光，但芳香族化合物小分子只有在低温（７７...     

汞代N—乙烯基咔唑—丙烯酸共聚物的合成与研究

制备线型和网状Ｎ－乙烯基咔唑－丙烯酸甲酯共聚物后，用三氟乙酸汞分别在四氢呋喃和二氯甲烷中进行汞化反应，得到相应的线型和网状汞代咔唑共聚物。这些共聚物经ＴＨＦ溶解或溶胀后，用氢氧化钠水溶液水解，得到相应的水溶性线型高分子和吸水性网状高分子，憎水性汞汞代咔唑共聚物在ＴＨＦ中由Ｉ２抽代汞；亲水性汞代咔唑共聚物在水溶液中由ＫＩ３取代汞、汞代咔唑高分子链在不同溶剂中可以产生不同的形态变化。     

一种基于形成杂多核络合物的荧光增敏效应的研究：Ⅲ.锰（Ⅱ）,钴（…

本研究了Ｍｎ＾２＋和Ｃｏ＾２＋对７－（８－羟基－３，６－二磺基萘偶氮）－８－羟基喹啉－５－磺酸－硼砂反应体系的混合荧光增敏作用。实验条件下，荧光增敏强度满足线性加和关系的范围是：Ｍｎ＾２＋浓度０￣２．９×１０＾－７ｍｏｌ／Ｌ；Ｃｏ＾２＋浓度０￣８．８～１０＾－７ｍｏｌ／Ｌ；总浓度不超过１．０×１０＾－６ｍｏｌ／Ｌ。检出限量为Ｍｎ＾２＋４．５×１０＾－９ｍｏｌ／Ｌ和Ｃｏ＾２＋１．４×１０＾－８ｍｏ     

新试剂N—烯丙基—N‘—（氧基对苯磺酸钠）硫脲（ASATu）的合成,表征及其反…

本文报道了新试剂Ｎ－烯丙基－Ｎ＇－（氨基对苯磺酸钠）硫脲（ＡＳＡＴｕ）的合成并确定了结构。该试剂与４５种元素在不同介质中反应，仅有Ｃｕ＾２＋，Ａｇ＾＋，Ｂｉ＾３＋，Ｈｇ＾２＋和Ｆｅ＾３＋等离子产生特征性反应。实验证明，它可作为Ｃｕ＾２＋，Ａｇ＾＋等新的鉴定试剂；在酸性和近中性介质中测定了该试剂与稀土元素等四十多种金属元素反应的摩尔吸光系数。     

Eu^2＋和Mn^2＋在SrMgP2O7中的光致发光及其能量传递

研究了Ｅｕ＾２＋、Ｍｎ＾２＋共激活的ＳｒＭｇＰ２Ｏ７的发光性质、浓度与荧光性质的关系，Ｅｕ＾２＋和Ｍｎ＾２＋的发射光谱分别在４００ｎｍ及６７０ｎｍ附近，它们是Ｅｕ＾２＋的５ｄ－４ｆ跃迁和Ｍｎ＾２＋的＾４Ｔ１（＾４Ｇ）－＾６Ａ１ｇ（＾６Ｓ）跃迁发射，实验结果表明，Ｅｕ＾２＋对Ｍｎ＾２＋的荧光发射有较强的敏化作用，Ｍｎ＾２＋对Ｅｕ＾２＋的荧光寿命和强度也有显著影响。     

笼形聚偕氨肟树脂的研究：酸处理树脂的吸附性能

笼形聚偕氨肟树脂（ＣＡＯ）经盐酸处理垢，伯胺基转变成胺盐。酸处理笼形聚偕氨肟树脂（ＡＣＡＯ）对Ｍｇ＾２＋，Ｃａ＾２＋，Ｂａ＾２＋，Ｍｎ＾２＋，Ｃｏ＾２＋，Ｎｉ＾２＋离子不吸附；对Ｚｎ＾２＋，Ｃｄ＾２＋，Ｃｕ＾２＋，Ｐｂ＾２＋离子的吸附效率在２０％以下，但对Ｈｇ＾２＋离子的吸附效率则高达７１．２％；对一些金属络阴离子的吸附效率顺序是Ｆｅ（ＣＮ）＾２－６＞Ｃｒ２Ｏ＾２－７＞ＭｏＯ＾２－４＞ＰｔＣｌ＾２     

铽—镧—磺基水杨酸共发荧光体系的研究和应用

研究发现,稀土离子Ｌａ＾３＋的存在可使二元配合物Ｔｂ＾２＋－磺基水杨酸体系的荧光强度增强５７倍,通过试验确定了Ｔｂ＾３＋－Ｌａ＾３＋磺基水杨酸共发荧光体系的形成条件与影响因素,并研究了该体系的荧光特性。在最佳条件下,Ｔｂ＾３＋浓度在４．８×１０＾－１０－８．０×１０＾－７ｍｇ·Ｌ＾－１范围内与荧光强度成正相关关系,检出限为１．１×１０＾－１０ｍｇ·Ｌ＾－１。利用该体系完成了合成样品与 标准稀土氧化     

荧光分析法测定痕量丁二酮

本文报道了邻苯二胺与丁二酮在１ｍｏｌ／ＬＨ２ＳＯ４介质中反应生成２，３－二甲基喹喔啉。该化合物具有较强的荧光（λｘ／λｅｍ＝３４０ｎｍ／４９０ｎｍ）其荧光量子产率ΦＦ＝０．１０１。丁二酮浓度在４．０×１０＾－７～５．２×１０＾－５ｍｏｌ／Ｌ范围内与转化成产物的相对荧光强度呈线性关系，相对标准偏差为１％，检出限为１．３×１０＾－７ｍｏｌ／Ｌ，考察了３０种物质表明，该法选择性好，用于实际啤酒样品中丁二     

Ti-V基储氢合金及其氢化物的物相结构与组分优化设计

Ti-V基储氢合金在室温、常压下即可表现出良好的储氢特性,且质量储氢容量明显高于传统AB₅型储氢合金,从而在氢气的精制和回收、运输和储存及热泵等方面有较早的应用。 此外,在混合气体分离、核反应堆中处理氢的同位素、镍氢电池及燃料电池负极材料等方面也得到了广泛的研究与关注。 基于目前Ti-V基储氢合金的研究现状,概述了该类合金的优势、限制性因素(包括成因)及改性手段。 此外,为了进一步理解Ti-V基合金储氢机理、构建合金组分与储氢特性之间的对应关系,本工作重点围绕Ti-V基储氢合金及其氢化物的结构、组分优化设计展开综述,并对其未来研究方向做出展望。     

Ni(Ⅱ)和Zn(Ⅱ)的乙基黄原酸盐与吡啶碱配合物的合成及性质的研究

乙基黄原酸基的结构为:(简写为Exan,它是一个双齿配体,能和许多金属离子形成稳定配合物。 本文依据实验结果,对3种Ni(Ⅱ)和2种Zn(Ⅱ)的乙基黄原酸盐混合配合物的性质作一些系统的比较.应用红外光谱讨论这些混合配合物的C—O及C—S键振动频率位移;用热谱讨论它们的热稳定性及失重过程的变化;通过组成分析用电子光谱及磁学方     

四环素-铕与卵磷脂的相互作用及卵磷脂的测定

以四环素(TC)-Eu3 作为荧光探针,提出了新的荧光光度法测量卵磷脂(PC)。在pH 5.7的酸度条件下,扫描不同浓度的PC与TC-Eu3 的荧光光谱。通过优化实验条件,得到了测定PC的最佳条件。卵磷脂能使TC-Eu3 位于612 nm处的特征荧光显著增强且增强的荧光强度与PC的量成正比。测量的线性范围为4.0×10-7~1.4×10-5mol/L,检出限为3.9×10-8mol/L。该方法已用于实际样品的测定。     

Synthesis and structure of hydroxyisoxazolidines and derivatives of hydroxylamine and alkenals

The reactions of N-substituted hydroxylamines with alkenals serve as a method for the synthesis of the corresponding 2-substituted 3(5)-hydroxyisoxazolidines. The reaction pathway is determined by the nature of the substituent attached to the nitrogen atom. Ring-chain isomerism has been detected in these newly obtained compoundsTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1270–1276, September, 1987.     

红霉素9,11-亚胺醚和乙腈分子加合物的合成和晶体结构

通过控制红霉素A (E)肟的贝克曼重排反应条件合成了一种关键中间体红霉素9,11-亚胺醚, 该化合物可与乙腈形成稳定的分子加合物(摩尔比为1∶1), 未见文献报道. 阐述了该化合物的合成、晶体结构、晶体学数据和结构参数. 该化合物为无色透明晶体, 属单斜晶系, 空间群P2₁. 对该加合物和已知化合物红霉素6,9-亚胺醚晶体结构的对照解析, 有助于对重排反应机理、异构化机理和两异构体还原差异性的分析, 对重排反应和还原反应起到积极的指导作用.     

Sizes of atoms and ions and covalency of bonding in molecules and crystals

A new system of atomic radii for the elements up to barium inclusive is constructed. Values of the radii are chosen so as the dependence between the dissociation energy of diatomic homonuclear molecules and a depth of atom overlapping is monotonous, and the scatter of data is minimal. The depth of overlapping is calculated as a difference between the sum of atomic radii and an experimental interatomic distance. Conclusions are made that: the radii of free atoms and ions are determined by the value of the electron density equal to 0.01 au; they considerably change in molecules and crystals only as a result of the charge transfer from cation to anion; covalent bonding is well described by the overlapping of free atoms (ions), confined by the surface of the given radius, and its energy depends upon the depth of overlapping of valence electron densities of atoms. A method of overlapping atoms is proposed for the approximate estimation of ionic sizes and charges in bound systems.     

Interaction and Stability of Mixed Micelle and Monolayer of Nonionic and Cationic Surfactant Mixtures

Interaction and stability of binary mixtures of cationic surfactants hexadecyltrimethylammonium bromide (HTAB) or hexadecylpyridinium bromide (HPyBr) with nonionic surfactant decanoyl-N-methyl-glucamide (Mega-10) have been studied at different mole fraction of cationic surfactants by using interfacial tension measurements and fluorescence probe techniques. From interfacial tension measurements, the critical micellar concentration and various interfacial thermodynamic parameters have been evaluated. The experimental cmc's were analyzed with the pseudophase separation model, the regular solution theory, and the Maeda's approach. These approaches allowed us to determine the interaction parameter and composition in the mixed state. By using the static quenching method, the mean micellar aggregation numbers of pure and mixed micelles of HTAB + Mega-10 were obtained. It has been observed that the aggregation number of mixed micelles deviates negatively from the ideal behavior. The micropolarity of the micelle was monitored with pyrene fluorescence intensity ratio and found to be increase with the increase of ionic content. The polarization of fluorescence probe Rhodamine B was monitored at different mole fraction of cationic surfactants.     

多环芳二酐型聚酯亚胺膜的透气性能

多环芳二酐型聚酯亚胺膜的透气性能李悦生，丁孟贤，徐纪平（浙江大学高分子科学与工程研究所，杭州，３１００２７）（中国科学院长春应用化学研究所）关键词聚醚酰亚胺，聚酯酰亚胺，膜，透气性通常的聚酰亚胺加工性能较差，在芳环二酐的苯环间引入醚键等柔性基团后，其...     

Synthesis and Photochemistry of Diphenylchlorin and Diphenylbacteriochlorin

5, 15-Diphenylporphyrin (DPP), a novel porphyrin model compound, was always inaccessible in quantities suitable for study1 because the difficulty of synthesis. So that the characteristic of this molecule had not been explored until a novel method developed for the preparation of DPP recently2. Therefore it will be possible for the synthesis of DPP-based photosensitizers, and investigation of their photodynamic properties. Here we reported the synthesis of novel photosensitizers 5, 15-diphe…