用聚乙二醇—硫酸铵—铝试剂体系萃取分离铁（Ⅲ）铝（Ⅲ）,铜（Ⅱ）钴（Ⅱ）…

研究了在聚乙二醇－硫酸铵－铝试剂体系中Ｆｅ（Ⅲ），Ａｌ（Ⅲ）、Ｃｕ（Ⅱ）、ＣｏⅡ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ）、Ｎｉ（Ⅱ）的萃取分离行为。结果表明，在ＰＨ５．０－６．５ＨＡｃ－ＮａＡｃ缓冲溶液中，Ｆｅ（Ⅲ）、Ａｌ（Ⅲ）可被ＰＥＧ相几乎完全萃取，而Ｃｕ（Ⅱ）、Ｃｏ（Ⅱ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ）基本上不被萃取，从而实现了Ｆｅ（Ⅱ）与Ｃｕ（Ⅱ）Ｃｏ（Ⅱ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ)及Ａｌ（Ⅲ）与Ｆｅ（Ⅲ）Ｃｏ（Ⅱ）、Ｃｕ（     

用聚乙二醇—硫酸铵—铬黑T体系从铁（Ⅲ）,钴（Ⅱ）,镍（Ⅱ）,铜（Ⅱ）中萃取…

本研究了聚乙二醇（ＰＥＧ）－（ＮＨ４）２ＳＯ４－铬黑Ｔ（ＥＢＴ）体系对Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）、Ｃｄ（Ⅱ）的非有机溶剂萃取行为。结果表明，在ｐＨ７￣１１的ＮＨ３·ＨＮＨＣｌ缓冲溶液中，Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）可被聚乙二醇（ＰＥＧ）相萃取，而Ｃｄ（Ⅱ）基本上不被萃取，从而获得了Ｃｄ（Ⅱ）与Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）混合离子的定量分离。     

聚乙二醇—硫酸铵—亚硝基R盐体系中钴（Ⅱ）的分离及其存在形态

在ｐＨ４．０～６．０的ＨＡｃ－ＮａＡｃ缓冲溶液中，Ｃｏ（Ⅱ），Ｆｅ（Ⅲ），Ｎｉ（Ⅱ），Ｃｕ（Ⅱ）等金属离子与亚硝基Ｒ盐可形成稳定络合物，加入ＨＣｌ适当提高溶液酸度（ＨＣｌ浓度在０．３～０．６ｍｏｌ／Ｌ）用聚乙二醇２０００（ＰＥＧ）－硫酸铵－亚硝基Ｒ盐体系萃取，Ｃｏ（Ⅱ）可被ＰＥＧ相几乎完全萃取，而Ｆｅ（Ⅲ），Ｎｉ（Ⅱ），Ｃｕ（Ⅱ）基本上不被萃取，实现了Ｃｏ（Ⅱ），Ｆｅ（Ⅲ），Ｎｉ（Ⅱ），Ｃｕ（Ⅱ）     

聚乙二醇-硫酸铵-亚硝基R盐体系中钴(Ⅱ)的分离及其存在形态

在 ｐＨ ４．０～６．０的 ＨＡｃ－ＮａＡｃ缓冲溶液中，Ｃｏ（Ⅱ）、Ｆｅ（Ⅲ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）等金属离子与亚硝基Ｒ盐可形成稳定络合物。加入ＨＣＩ适当提高溶液酸度（ＨＣＩ浓度在０．３～０．６ｍｏｌ／Ｌ），用聚乙二醇２０００（ＰＥＧ）－硫酸铵－亚硝基Ｒ盐体系萃取，Ｃｏ（Ⅱ）可被ＰＥＧ相几乎完全萃取，而Ｆｅ（Ⅲ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）基本上不被萃取。实现了Ｃｏ（Ⅱ）、Ｆｅ（Ⅲ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）混合离子合成样品和硅酸盐岩矿实际样品中Ｃｏ（Ⅱ）的分离与测定。同时吸收光谱、摩尔比、连续浓度变换、加入表面活性剂等实验表明，在萃取相Ｃｏ（Ⅱ）与亚硝基Ｒ盐是１：３络阴离子形式存在的。     

硫酸铵-硫氰酸铵-乙醇体系萃取浮选 Cu(Ⅱ)

研究了在少量抗坏血酸存在下,硫酸铵－硫氰酸铵－乙醇体系萃取浮选Ｃｕ（Ⅱ）的行为。Ｃｕ（Ⅱ）被抗坏血酸还原为Ｃｕ（Ⅰ）后能与ＳＣＮ－生成ＣｕＳＣＮ沉淀。该沉淀可以被萃取浮选在乙醇与水两相界面之间。ＰＨ１～４时,能使Ｃｕ（Ⅱ）与常见离子Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｍｎ（Ⅱ）、Ｚｎ（Ⅱ）、Ｃｄ（Ⅱ）、Ｃｒ（Ⅲ）、Ｍｏ（Ⅳ）分离。     

中位—四（4—N—氰甲基吡啶）卟啉—铜（Ⅱ）络合物及其与脱氧核糖核酸…

本文在银胶活性基质上获得了Ｃｕ（Ⅱ）的中位－四（４－Ｎ－氰甲基吡啶）卟啉络合物Ｃｕ（Ⅱ）ＮＡＣＮ的表面增强喇曼光谱光谱，并与其ＲＲＳ光谱作了比较，讨论了ＰＨ值和Ｃｕ（Ⅱ）ＮＡＣＮ的复合物的ＳＥＲＳ光谱的影响，研究了小牛胸腺双链ＤＮＡ及其变性ＤＮＡ与Ｃｕ（Ⅱ）ＮＡＣＮ的复合物的ＳＥＲＳ光谱，指出Ｃｕ（Ⅱ）ＮＡＣＮ是通过吡啶氮和卟啉核共同与银胶作用的，Ｃｕ（Ⅱ）ＮＡＣＮ是斜向吸附在银表面上的，最佳ＰＨ     

氧化铈在非贵金属氧化物催化剂中的作用：Ⅵ.Cu—Fe—Ce—O催化剂的结 …

采用ＸＲＤ,顺磁共振（ＥＳＲ）,Ｍｏｓｓｂａｕｅｒ和或温还原（ＴＰＲ）技术对负截型Ｃｕ－Ｆｅ－Ｏ（Ⅰ）,Ｃｕ－Ｆｅ－Ｃｏ－Ｏ（Ⅱ）催化剂的固相结构及热稳定性进行了研究。结果发现,（Ⅰ）中主要存在Ｆｅ２ＣｕＯ４,ＣｕＯ和颗粒度小于１３ｎｍ的Ｆｅ２Ｏ３相。随着焙烧温度的升高,ＣｕＯ晶相逐渐消失,Ｆｅ２ＣｕＯ４的晶相长大。（Ⅱ）中Ｃｅ的存在,能提高Ｃｕ＾２＋的浓度,抑制ＣｕＯ和Ｆｅ２ＣｕＯ４晶相的生成,     

D-氨基葡萄糖甘氨酸混配金属配合物与DNA作用的光谱研究

研究了４种Ｄ－氨基葡萄糖甘氨酸混配金属配合物的表面增强拉曼光谱（ＳＥＲＳ）,发现它们在银胶上的吸附方式基本相同,因而ＳＥＲＳ光谱相似,用电子光谱、荧光光谱、表面增强拉曼光谱研究了它们与ＤＮＡ的相互作用,发现这４种化合物与ＤＮＡ的作用能力有很大的不同,其中ＧｕＧｌｕＧ、Ｃｏ（Ⅲ）ＧｌｕＧ是值得进一步研究的可能抗癌的药物。     

联氨在d—过渡金属配合物的MTP（о—NO2）TBP修饰石墨电…

研究了Ｎ２Ｈ４在间－四（邻－硝基苯基）四苯并卟啉铁（Ⅲ）、钴（Ⅱ）、锌（Ⅱ）和镍（Ⅱ）配合物［ＭＴＰ（о－ＮＯ２）ＴＢＰ，简称ＭＴＢＰ］修饰石墨电极上的催化电氧化反应，测得该系列金属四苯并卟啉的催化活性的顺序为Ｃｏ（Ⅱ）ＴＢＰ＞ＣｌＦｅ（Ⅲ）ＴＢＰ＞Ｎｉ（Ⅱ）ＴＢＰ＞Ｚｎ（Ⅱ）ＴＢＰ≈石墨，考察了Ｃｏ（Ⅱ）ＴＢＰ和ＣｌＦｅ（Ⅲ）ＴＢＰ催化联氨电氧化反应的动力学过程。结果表明，ＯＨ＾－和Ｎ２Ｈ４在Ｃ     

中位－四（邻－硝基苯基）四苯并卟啉及其d过渡金属配合物的电化学性质

用微电极技术和循环伏安法研究了中位－四（邻硝基苯基）四苯并卟啉［ＴＰ（ｏ－ＮＯ＿２）ＴＢＰ］及其Ｆｅ（Ⅲ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）和ｚｎ（Ⅱ）配合物在ＤＭＦ介质中的电化学行为。测得其电子转移过程的半波电位、标准速率常数及在ＤＭＦ中的扩散系数。并研究了吡啶轴向配位对Ｃｏ（Ⅱ）ＴＰ（ｏ－ＮＯ＿２）ＴＢＰ的氧化还原电位和速率的影响。提出了标题配位化合物在ＤＭＦ一吡啶混合溶剂中的电子转移机理。     

碳笼氧化物的结构和谱学性质

碳笼氧化物对碳笼的官能团化研究具有重要意义，因而激起了人们广泛的研究兴趣。本文对碳笼氧化物C₆₀O_n、C₇₀O_n、C₇₆O_n、C₇₈O_n及C₈₀O_n的结构、电子光谱、红外光谱及核磁共振谱的研究进展进行综合评述。介绍了国内外近十几年来众多研究小组的工作，并结合作者本人在此方面的理论研究成果，进一步探索碳笼氧化物的结构特点以及光谱性质的规律性。在对C₆₀及C₇₀氧化物研究结果与实验符合的基础上，预测高碳笼氧化物的结构和光谱。     

Dinitramide and its salts

The vibrational and electronic spectra of dinitramide salts MN(NO₂)₂ (M=K, Na, Li, NH₄, Fe, Ag, Mn, Mg, Rb, C(NH₂)₃) have been studied. The IR and Raman spectra of solutions and melts of the salts have been satisfactorily interpreted on the basis of the anion model withC _2v symmetry. The complication of the spectra in the crystalline phase has been explained by restructurization of the anion that reduces its symmetry and makes the nitro groups nonequivalent.For part 6, seeIzv. Akad. Nauk, Ser. Khim., 1995, 113 [Russ. Chem. Bull.,44, 108 (Engl. Transl.)].Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1508–1512, August, 1995.     

Syntheses and spectral properties of longwave absorbing and fluorescing substrates for the direct and continuous kinetic assay of carboxylesterases,phosphatases, and sulfatases

Syntheses, absorption and fluorescence properties for a series of new enzyme substrates are described, which are derived from 7-hydroxycoumarins possessing electron-withdrawing substituents in position 3. The new substrates are advantageous over existing ones in that they exhibit longwave absorption and fluorescence maxima as well as largeStokes' shifts. In addition, theirpK _a values, which are usually between 6.0 and 7.0, allow the direct and continuous kinetic assay of hydrolases such as esterases, phosphatases, and sulfatases.

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Synthesen und spektrale Eigenschaften langwellig absorbierender und fluoreszierender Substrate für die direkte und kontinuierliche kinetische Bestimmung von Carboxylesterasen, Phosphatasen und Sulfatasen

Zusammenfassung Die Synthesen und Absorptions- sowie Fluoreszenzspektren einer Reihe neuer Enzymsubstrate werden beschrieben, welche von 7-Hydroxycumarinen mit elektronenziehenden Substituenten in 3-Stellung abgeleitet sind. Die neuen Substrate bieten gegenüber bisherigen den Vorteil langwelliger Absorptions- und Fluoreszenzmaxima sowie großerStokes-Verschiebungen. Die niedrigenpK _s -Werte, welche zwischen 6 und 7 liegen, erlauben weiters eine direkte und kontinuierliche kinetische Bestimmung von Hydrolasen vom Typ der Esterasen, Phosphatasen und Sulfatasen.

     

Diffuse reflection FTIR spectral database of dyes and pigments

24 pigments commonly used in art have been characterized by diffuse reflection infrared spectroscopy (DR). All of the compounds have also been characterized by means of infrared absorption spectroscopy to demonstrate the reliability of the DR technique. This is the first record of the use of this technique as an analytical tool in conservation science, and the results appear to be promising for the identification of unknown pigments used on historical and artwork artifacts. Although the DR technique used here is not nondestructive, it can still be usefully applied to the analysis of artwork since it requires only a very small quantity of sample for analysis.     

Synthesis and structural studies of complexes of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) with substituted chalcones

Complexes of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) with 3-(2-pyridyl)-1-(2-hydroxy phenyl)-2-propen-1-one (PHPO), 3-(1-naphthyl)-1-(2-hydroxy phenyl)-2-propen-1-one (NHPO) and 3-(3,4-dimethoxy phenyl)-1-(2-hydroxy phenyl)-2-propen-1-one (DMPHPO) have been synthesized and characterized by analytical, conductivity, thermal, magnetic, infrared, electronic and electron spin resonance data. Based on analytical data the stoichiometry of the complexes has been found to be 1 : 2. The conductivity data show that all these complexes are non-electrolytes. The infrared spectral data indicate that the ligand PHPO acts as uninegative tridentately towards Co(II) and Ni(II) and bidentately with Cu(II), Zn(II) and Cd(II). Ligands like NHPO and DMPHPO act as uninegative bidentately with all the metal ions. The electronic spectral data suggest that all the Co(II) complexes and Ni(II) of PHPO complex are octahedral and all the Cu(II) and Ni(II) of NHPO and DMPHPO complex are square-planar. The complex of Zn(II) and Cd(II) are tetrahedral. ESR parameters of Cu(II) complexes have been calculated and relevant conclusions have been drawn with respect to the nature of bonds present in them.     

The synthesis and characterization of norbornylsilasesquioxanes

Norbornene reacts with trichlorosilane to generate norbornyltrichlorosilane in high yield. The slow hydrolysis of norbornyltrichlorosilane in acetone yields incompletely condensed norbornyl-silasesquioxanes. The compound C₄₂H₇₀O₁₁Si₆ can be isolated from this reaction. On the basis of elemental analyses, ¹H, ¹³C and ²⁹Si NMR, mass spectroscopy, infrared spectroscopy, and crystallographic analysis, C₄₂H₇₀O₁₁Si₆ is formulated as [(C₇H₁₁)₆Si₆O₇(OH)₄], with the Si₆O₇ framework being composed of two perpendicular Si₄O₄ planes sharing an edge. [(C₇H₁₁)₆Si₆O₇(OH)₄] is a putative model of vicinal [Si(OH)]₂ sites on the surface of partially dehydroxylated silica.     

四(对-硝基苯基)卟啉配合物的红外和拉曼光谱

本文研究了四(对-硝基苯基)卟啉及其Cr(Ⅲ)、Mn(Ⅲ)、Fe(Ⅲ)、Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)配合物的3500～220cm~(-1)的红外光谱和1700～100cm~(-1)的拉曼光谱.谱带归属表明,～250cm~(-1)谱带是M—N伸缩振动和卟啉环变形振动的复合振动.金属敏感带出现在～1600、～1582、～1547、～1284、～1190、～355和～245cm~(-1)处,其中二价金属配合物金属敏感带频率按Ni>Co>Cu>Zn顺序递减.用金属半径和d_x~2 y~2电子排斥作用解释了金属敏感带变化规律.     

Synthesis and Reactions of Polynuclear Heterocycles: Azolothienopyrimidines and Thienothiazolopyrimidines

We prepared a thieno[2,3-d]pyrimidine compound fused with a thiazolo ring to produce biologicaly active compounds. In a one-step reaction, 2-arylmethylene derivative (3) was prepared via the reaction of a ternary mixture of 2-thioxo-1,2,3,4-tetrahydrocyclohepteno[4,5]thieno[2,3-d]pyrimi-dine-4-one (2), cloroacetic acid, and a proper aldehyde. The reaction of 2 with 3-chloropent-2,4-dione in ethanolic potassium hydroxide yielded the S-acetylacetone derivative 4e. The latter compound reacted with hydrazine hydrate and phenyl hydrazine to give 2-pyrazolthio derivatives 8a,b, respectively. Compound 4e also underwent cyclization on boiling with acetic anhydride/pyridine solution to form 2-acetyl-3-methyl thiazolo[3,2-a]cyclohepteno[4,5]thieno[2,3-d] pyrimidine-5-one (9). To support the structure 9, it gave a characteristic reaction for the 2-acetyl group. The 2-methylthio derivatives 4a underwent further alkylation at N₃ to give 6a,b. The purpose of the synthesis of thienopyrimidine derivatives is due to high biological activities. The 4-oxo-thienopyrimidine derivatives acted as inhibitors of adenosine kinase, platelet aggregation, antilukemia, and anticancer activities.     

L-谷氨酸桥连的卟啉二联体配体及其铜配合物的合成、表征和性质研究

合成了未见报道的L-谷氨酸桥连的卟啉二联体配体及其铜的金属配合物, 并用红外光谱, 电子吸收光谱, 核磁氢谱, 元素分析和质谱等对化合物的结构加以确认, 研究了配体和金属配合物的CD, 拉曼光谱和荧光光谱的变化. 结果显示在配体中没有出现劈裂的Cotton效应, 而铜配合物中出现了劈裂的正负Cotton效应, 配体的荧光强度强于铜配合物的荧光强度, 在拉曼光谱中, 由于卟啉分子平面的对称性由D_2h变为D_4h群及其铜离子d轨道的电子效应, 在卟啉配体和铜配合物之间的拉曼光谱有很大差别.     

The fluorescence of ellagic acid and its borax complex

The absorption and fluorescence properties of the plant phenol ellagic acid have been studied in alcohol and aqueous solutions. Fluorescence is weak in all kinds of solvents, but is greatly enhanced by addition of borax. The resulting complex emits much more intensely in methanol than in water solution. UV and fluorescence data reveal that the complex formed in methanol is different from the complex formed in aqueous solution. The enormous fluorescence enhancement of ellagic acid by borax offers a simple method for the visualization and quantification of the potent anti-mutagen ellagic acid as well as a fluorimetric method for the determination of boron.The IUPAC name for ellagic acid is 2,3,7,8-tetra-hydroxy[1]benzopyrano[5,4,3—c,d,e][1]-benzopyran-5,10-dione.