新试剂2-[2,3,5-三氮唑偶氮]-5-二甲氨基苯甲酸与钴的显色反应研究及应用

合成了试剂２－「２,３,５－三氮唑偶氮」－５－二甲氨基苯甲酸（２－「２,３,５－ｔｒｉａ－ｚｏｌｙｌａｚｏ」－５－ｄｉｍｅｔｈｙｌａｎｉｎｏｂｅｎｚｏｉｃ简称ＴＺＡＭＢ）,并研究了与钴的显色反应。在ＰＨ８．０２的水溶液中钴与ＴＺＡＭＢ形成一种稳定的蓝色络合物,其最大吸收波长位于６０９．４ｎｍ处,表观摩尔吸光系数为７．３７＊１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１。络合物的组成为Ｃｏ＾２＋;ＴＺＡＭＢ＝１：３,钴的浓度在０－１．２ｍｇ．Ｌ＾－１范围内服比耳定律。方法已用于维生素Ｂ注射液和天然水中微量钴的测定。     

苯酚氧化羰化合成碳酸二苯酯的新型PdCl2-Co(Pyca)2催化体系

研究了新型的Ｐｄ－Ｃｏ催化体系催化氧化碳化苯酚合成碳酸二苯酯。当ｎ（ＰｄＣｌ２）：ｎ「Ｃｏ（Ⅱ）」：ｎ（四丁基化铵）：ｎ（苯醌）＝１：１：１０：２５,Ｔ＝１２０,Ｐ＝２．５ＭＰａ（Ｐｃｏ／Ｐｏ２＝４：１）,反应时间８ｈ,ＰｄＣｌ２－Ｃｏ（Ｐｙｃａ）２比ＰｄＣｌ２－Ｃｏ（ＯＡｃ）２的催化活性高。当使用ＰｄＣｌ２－Ｃｏ（Ｐｙｃａ）２催化剂时,ＤＰＣ的产率为６．０３％。最佳的反应温度是１２０℃,ＤＰＣ的产率随着体系的总压增加而增大,当压力升到３．５ＭＰａ时,ＤＰＣ产率为８．５３％。     

SLS存在下meso-四(对三甲胺基苯基)卟啉测定微量铜

研究了表面活性剂十二烷基苯磺酸钠存在时,ｍｅｓｏ－四（对三甲基苯基）卟啉「Ｔ（４－ＴＭＡＰ）Ｐ」与铜的显色反应。在ｐＨ＝３．７的ＨＡｃ－ＮＡａｃ介质中,在ＳＬＳ眄,铜与「Ｔ（４－ＴＭＡＰ）Ｐ」形成１：２的稳定配合物,至少在４．５ｈ内吸光度无变化。最大吸收波长位于４１０ｎｍ,ε＝３．７９×１０＾５Ｌ．ｍｏｌ＾０－１．ｃｍ＾－１。     

2－（2－噻唑偶氮）－5－〔N，N－二羧基甲基）氨基〕苯甲酸与钯显色反应的研究及其应用

报道了一种对钯离子具有高灵敏度和选择性的新试剂２－（２－噻唑偶氮）－５－［（Ｎ，Ｎ－二羧基甲基）氨基］苯甲酸（ＴＡＤＣＡＢ）。在０．５ｍｏｌ／ＬＨＮＯ＿３介质中，ＴＡＤＣＡＢ与Ｐｄ（Ⅱ）形成蓝色配合物，组成为Ｐｄ：ＴＡＤＣＡＢ＝１：２，最大吸收波长６５２ｎｍ。钯浓度在０～１．４μｇ／ｍＬ范围内符合比耳定律。用双波长法测定，表观摩尔吸光系数ε＿（６５２．０～５３３．６）＝８．２×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），可以允许大量金属离子共存。所确立的方法无需掩蔽剂和其它分离手段，即可直接用于Ｐｔ－Ｐｄ催化剂中微量钯的测定，结果满意。     

RE[CH2（CH2）4CONC4H9]3（NO3）3（RE=La,Dy）的合成和晶体结构

采用Ｘ－射线四园衍射仪测定了Ｄｙ「Ｃｈ２（ＣＨ２）４ＣＯＮＣ４Ｈ９」３（ＮＯ３）３和Ｌａ「ＣＨ２（ＣＨ２）４ＣＯＮＣ４Ｈ３」３（ＮＯ３）３的晶体结构。两个配合物具有相似的结构，均属单斜晶系，空间群为Ｐ２１／ｃ。晶体参数：Ｄｙ「Ｌａ」：ａ＝１．８５６４（３）「１．８５６４（２）」ｎｍ，ｂ＝０．９７６９（２）「０．９８３４（１）」ｎｍ，ｃ＝２．１８６３（６）「２．２００３８（７）」ｎｍ，β＝９６．０８     

两个异亚砂基乙酰丙酮—N—芳基亚胺Pd（Ⅱ）配合物的合成 …

合成了两个异亚硝基乙酰丙酮－Ｎ－芳基亚胺的Ｐｄ（Ⅱ）配合物,ＰｄＣｌ（Ｃ６Ｈ５－ＩＡＩ）（Ｃ６Ｈ５ＮＨ２）（１）和ＰｄＣｌ（ｐ－ＣＨ３Ｃ６Ｈ４－ＩＡＩ）（ｐ－ＣＨ３Ｃ６Ｈ４ＮＨ２）（２）,并测定了配合物１的晶体结构。配合物１晶体属正交晶系,空间群为Ｐｃａ２１,晶胞参数ａ＝１．８５８７（４）ｎｍ,ｂ＝０．９３８０（２）ｎｍ,ｃ＝２．１２３７（４）ｎｍ,Ｚ＝８,Ｆ（０００）＝１７６０,μ＝１．１６０ｍ     

配合物[Co（NH3）5Br]Br2煌精密X射线粉末衍射与指标化研究

以多晶射中的从头结构测定对其数据收集与处理的要求为依据，获得「Ｃｏ（ＮＨ３）５Ｂｒ」－Ｂｒ２配合物的精密Ｘ射线粉末衍射谱的方法，总结了指标化实验中的问题与对策，得到标题配合物的正交晶系，晶胞参数：ａ＝１．３７１０（１）ｎｍ，ｂ＝１．０７１５（１）ｎｍ，ｃ＝０．６９４７（１）ｎｍ，Ｖ＿１．０２０６（１）ｎｍ＾３，Ｚ＝４，Ｄｘ＝２．５０ｇ．ｃｍ＾－３，Ｆ３０＝８１（０．００７１，５２），Ｍ２０＝４１。     

3,3′,5,5′—四甲基联苯胺吸光光度法测定水中NO2^——N

提出用３,３′,５－５′－四甲基联苯胺（ＴＭＢ）吸光光度法测定水中ＮＯ２＾－－Ｎ。在ＨＯＡｃ－ＮａＯＡｃ缓冲液（ｐＨ３．６）中,ＴＭＢ与ＮＯ２＾－反应生成蓝色的ＴＭＢ－ＴＭＢ亚胺传荷络合物,其最大吸收波长为６５０ｎｍ,表观摩尔吸光系数为２．５９×１０＾４,ＮＯ２＾－－Ｎ与０～０．５μｇ·ｍｌ＾－１范围内服从比耳定律。运用此法测定了环境水样并进行了加标回收试验,结果满意。     

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。     

5-Br-PADAB分光光度法测定钯

研究了４－（５－溴－２－吡啶偶氮）－１,３－二氨基苯（简称５－Ｂｒ－ＰＡＤＡＢ）分光光度法测定微量钯的反应,在乙酸介质中Ｐｄ（Ⅱ）与５－Ｂｒ－ＰＡＤＡＢ生成紫红色络合物,确定了分光光度法测定钯的新体系。在实验条件下试剂的最大吸收峰位于４３８ｎｍ处,络合物的最大吸收峰位于５６４ｎｍ处,表观摩尔吸光系数ε＝５．２０×１０－４Ｌ／ｍｏｌ．ｃｍ,用等摩尔连续变化法、摩尔比法测得络合比ｎ（Ｐｄ（Ⅱ））∶ｎ（５－Ｂｒ－ＰＡＤＡＢ）＝１∶１,钯离子的量浓度在４．２７×１０－８～１．５４×１０－５ｍｏｌ／Ｌ时,服从Ｂｅｅｒ定律。试验了３０种离子在一定量下不干扰测定。     

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...     

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。     

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).     

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.     

Synthesis of Tyrosol and Hydroxytyrosol Glycofuranosides and Their Biochemical and Biological Activities in Cell-Free and Cellular Assays

Tyrosol (T) and hydroxytyrosol (HOT) and their glycosides are promising candidates for applications in functional food products or in complementary therapy. A series of phenylethanoid glycofuranosides (PEGFs) were synthesized to compare some of their biochemical and biological activities with T and HOT. The optimization of glycosylation promoted by environmentally benign basic zinc carbonate was performed to prepare HOT α-L-arabino-, β-D-apio-, and β-D-ribofuranosides. T and HOT β-D-fructofuranosides, prepared by enzymatic transfructosylation of T and HOT, were also included in the comparative study. The antioxidant capacity and DNA-protective potential of T, HOT, and PEGFs on plasmid DNA were determined using cell-free assays. The DNA-damaging potential of the studied compounds for human hepatoma HepG2 cells and their DNA-protective potential on HepG2 cells against hydrogen peroxide were evaluated using the comet assay. Experiments revealed a spectrum of different activities of the studied compounds. HOT and HOT β-D-fructofuranoside appear to be the best-performing scavengers and protectants of plasmid DNA and HepG2 cells. T and T β-D-fructofuranoside display almost zero or low scavenging/antioxidant activity and protective effects on plasmid DNA or HepG2 cells. The results imply that especially HOT β-D-fructofuranoside and β-D-apiofuranoside could be considered as prospective molecules for the subsequent design of supplements with potential in food and health protection.     

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.     

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.