几种聚醚酰亚胺的气体透过性能

本文研究了一系列芳环聚醚酰亚胺(PEI)对H_2、CO_2、O_2和N_2的透过性能与分子结构之间的关系。单醚酐型聚醚酰亚胺具有较高的透氢系数和H_2/N_2分离系数。由半刚性的4,4′-二氨基二苯酮(DABP)与柔性的三苯二醚四酸二酐(HQDPA)、二苯醚四酸二酐(ODPA)缩聚得到的聚醚酰亚胺具有很高的H_2/N_2、CO_2/N_2和O_2/N_2分离系数。     

联苯二酐型聚酰亚胺的透气性能与分子结构关系的研究

联苯二酐型聚酰亚胺的透气性能与分子结构关系的研究李悦生，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）关键词聚酰亚胺，膜，气体分离，透气性，透气选择性联苯二酐（ＢＰＤＡ）型聚酰亚胺具有较高的透气选...     

双醚二酐型聚醚酰亚胺的透气性能与分子结构之间关系的研究Ⅰ

合成了一系列双醚二酐型聚醚酰亚胺（ＰＥＩ），研究了它们对Ｈ２、ＣＯ２、Ｏ２、Ｎ２和ＣＨ４五种气体的透过性能与分子结构的关系．结果表明，这类聚醚酰亚胺的分子结构对其透气性和透气选择性有很大的影响，聚合物的自由体积和链段活动性是控制透气性和透气选择性的主要因素。三种带有酰亚胺键邻位取代基的聚醚酰亚胺（ＨＱＤＥＡ—ＤＭｏＢＤＡ、ＨＱＤＥＡ—ＤＭＭＤＡ和ＨＱＤＥＡ—ＤＭｏＭＤＡ）具有较大的自由体积和较小的链段活动性、很高的透气性和透气选择性。     

含1,1′-联萘基团可溶性聚酯酰亚胺的合成与性质

从１ ,１′联２ ,２′萘酚出发合成了新型具有非共平面结构的联萘类二酐单体,即２ ,２′（３ ,３′,４ ,４′四酸二酐） 二苯甲酰氧基１ ,１′联萘． 通过联萘二酐与不同二胺单体的溶液缩聚反应制备得到了一系列新型聚酯酰亚胺． 聚合物表现出良好的溶解性、热性能及薄膜透光性．     

新型萘酰亚胺衍生物的合成及抗肿瘤活性评价

本文合成了三种新的萘酰亚胺衍生物,并对其体外抗肿瘤活性进行了评价.初步实验结果表明,以芳基修饰氨萘菲特芳环上氨基所得化合物体外活性不如阳性对照氨萘菲特.而利用1,4-丁二醇修饰4-溴-1,8-萘酐芳环上溴原子得到的化合物3与阳性对照及其它两种衍生物相比对肝癌细胞HepG2具有较低的IC_(50)值.     

单醚二酐型聚醚酰亚胺的透气性能与分子结构之间关系的研究

合成了一系列单醚二酐型聚醚酞亚胺（ＰＥＩ），研究了它们对Ｈ２、ＣＯ２、Ｏ２、Ｎ２和ＣＨ４５种气体的透过性能与分子结构的关系．结果表明，这类聚醚欧亚胺的分子结构对其透气性和透气选择性有很大的影响，聚合物的自由体积和链段活动性是控制透气性和透气选择性的主要因素．二苯醚四酸二酐（ＯＤＰＡ－４．４＇－二Ｊ氨基二苯异丙烷（ＩＰＤＡ）具有很大的自由体积和较小的链段活动性、很大的透气性和较小的透气选择性，ＯＤＰＡ—４，４’－二氨基二苯酮（ＤＡＢＰ）具有很小的自由体积和较小的链段活动性、很小的透气性和较大的透气选择性，ＯＤＰＡ—３，３’－二甲基二苯甲烷二胶（ＤＭＭＤＡ）具有较大的自由体积和较小的链段活动性、很大的透气性和很大的透气选择性．     

3,6-二氨基-N-异丁基邻苯二甲酰亚胺的合成

以3-硝基邻苯二甲酸为原料,经脱水成酐、氨解、还原酰化、硝化、水解、还原等六步反应合成了一种新型的环芳酰胺的构筑单元对苯二胺衍生物——3,6-二氨基-N-异丁基邻苯二甲酰亚胺,总收率16.4％,其结构经1H NMR,13C NMR和ESI-MS表征.     

分子结构对聚芳醚酮薄膜透气性的影响

分子结构对聚芳醚酮薄膜透气性的影响王忠刚，陈天禄，徐纪平（中国科学院长春应用化学研究所长春１３００２２）关键词聚芳醚酮，气体分离膜，结构－性能关系为了改善聚合物薄膜的透气性能，开发具有高透气性和高选择性的膜材料，人们对膜分子结构与透气性能间的关系进行...     

1,8—萘酐和1,8—萘酰亚胺中硝基和卤素基团的亲核取代反应

研究了１，８－萘酐和１，８－萘酰亚胺萘环上硝基和卤素原子的亲核取代反应，讨论了影响亲核取代反应的因素，根据２，４－二硝基苯酚与脂胺肪的亲核取代机理，提出了４－硝基－１，８－萘酐及４－硝基－１，８－萘酰亚胺与脂肪胺发生亲核取代反应可能的反应机理。     

一种可溶性聚萘酰亚胺的合成与性能

本文合成了既带有一个苯环侧基又带2个醚键的萘二酐单体, 并采用该二酐单体与4,4′-ODA进行聚合得到了具有良好溶解性和耐热性的聚萘酰亚胺, 该PNI表现出了非常好的耐水解性能, 其耐水解性远远超过五元环聚酰亚胺.     

Determination and study on residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil

A QuEChERS (quick, easy, cheap, effective, rugged, and safe) method for the determination of benazolin-ethyl and quizalofop-p-ethyl in rape and soil by high-performance liquid chromatography-tandem mass spectrometry has been developed in this study. The residue and dissipation of benazolin-ethyl and quizalofop-p-ethyl in rape and soil were determined with the developed method. The half-lives of benazolin-ethyl in rape straw and soil were 3.7–5.1 days and 14.3–26.3 days, respectively. The half-lives of quizalofop-p-ethyl in rape straw and soil were 5.0-6.1 days and 0.3–9.7 days, respectively. The residue of benazolin-ethyl and quizalofop-p-ethyl in rapeseed and soil were below the detection limit (i.e., 0.5?mg?kg^?1, the maximum residue level of European Union for quizalofop-p-ethyl).     

微量元素与疾病诊断治疗的研究现状及展望

对国内外微量元素与疾病的关系及其诊断治疗的研究现状及研究动向进行了综述，包括：微量元素与地方病、癌肿、心血管病、糖尿病、眼病、神经系统病等。参考文献72篇。     

Ferrocene and ferrocenium modified clays and their styrene and EVA composites

In this work, ferrocene- and ferrocenium-containing salts were employed to modify montmorillonite. X-ray measurements show an increase in the interlayer spacing upon clay modification, which means that the larger and more organophilic cations were inserted into the gallery space of montmorillonite. Attempts to prepare nanocomposites of polystyrene and ethylene vinyl acetate copolymers lead to immiscible systems; the morphology of these systems was elucidated with TEM, XRD and cone calorimetry. The thermal stability of the composites is greater than that of the virgin polymer.     

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。     

钒与糖代谢及糖尿病

微量元素钒作为生物体内必需元素，经证实有很重要的生理学功能，与机体糖代谢有十分密切的关系，且能降低糖尿病动物模型的高血糖，极有可能被开发为治疗糖尿病的药物。     

Synthesis and Optical and Redox Properties of Symmetric and Asymmetric BODIPYs

Herein, we present the synthetic route and the photophysical, electrochemical as well as laser properties of novel red‐emitting boron‐dipyrromethenes (BODIPYs) bearing arylethyne moieties. Such functionality is added along the main axis of the chromophore leading to single‐ and double‐substituted derivatives. The relationship between the dye structure and the lasing properties is studied in detail with the help of the photophysical and electrochemical properties as well as quantum mechanical simulations. The asymmetric substitution of the parent dye induces inhomogeneities in the charge distribution, which leads to an overall loss of the fluorescence capacity, mainly in polar media. Such non‐radiative deactivation processes can be softened by decreasing the electron‐donor ability of the substituent or even avoided by symmetrical substitution. Thus, grafting of the arylethyne moieties at the longitudinal axis of the indacene core results in an effective strategy to develop red‐edge BODIPYs with highly efficient and photostable laser emission.     

Conformations and steric and stacking interactions of trisubstituted ureas and thioureas with alkyl and phenyl groups

The monomeric ν(N—H) vibrations of various trisubstituted ureas of the R₂UPh type and -thioureas of the R₂TUPh type have been studied. The trans—out isomerism in the former and the trans—out—cis isomerism in the latter are discussed from the point of view of steric effect. The monomeric ν(N—H) vibrations of RPhUPh and RPhTUPh are also examined. The single band appearing in the spectrum of both ureas is characteristic of the cis form; this suggests the existence of phenyl—phenyl interaction (the stacking interaction proposed by Galabov et al. [10]). Behavior of ν(N—H) vibrations at several concentrations is shown to be clearly different in the three forms (trans, out and cis). The presence of the cis form is confirmed by solvent effect experiments.     

含茂基苯并三氮唑基镧系有机配合物的合成及表征

三茂基镧系化合物和苯并三氮唑在四氢呋喃中反应,合成了7个未见文献报道的含茂基苯并三氮唑基镧系有机配合物,经元素分析、IR和MS测定,从有关数据推测了这类配合物的可能结构。