以^99 43Tc—二乙三胺五乙酸—白细胞介素三元体系对白细胞介素—2进行标记和

白细胞介素－２（ＩＬ－２）是机体免疫网络系统是起重要调节作用的淋巴因子，它能激活多种免疫细胞使其产生免疫活性。以＾９９ ４３Ｔｃ标记ＩＬ－２，用＾９９４３Ｔｃ－二乙三胺五乙酸（ＤＴＰＡ）－ＩＬ－２的三元一系产物作为标记物进行检测，然后将标记物用于体内的ＩＬ－２受体显像的研究，有助于认识某些疾病的发生机理，可用于监测某些疾病的动态变化和实验性治疗。     

以9943 Tc-二乙三胺五乙酸-白细胞介素三元体系对白细胞介素-2进行标记和检测

白细胞介素-2(IL-2)是机体免疫网络系统起重要调节作用的淋巴因子,它能激活多种免疫细胞使其产生免疫活性.以9943 Tc标记IL-2,用9943 Tc-二乙三胺五乙酸(DTPA)-IL-2的三元体系产物作为标记物进行检测,然后将标记物用于体内的IL-2受体显像的研究,有助于认识某些疾病的发生机理,可用于监测某些疾病的动态变化和实验性治疗.     

Searching for Peptide Ligands of Interleukin-2 Receptor α Chain in Phage-displayed Peptide Library

Ｉｎｔｅｒｌｅｕｋｉｎ－２（ＩＬ－２）ｉｓａ１３３－ａｍｉｎｏａｃｉｄｌｙｍｐｈｏｋｉｎｅｐｒｏｔｅｉｎｓｅｃｒｅｔｅｄｂｙａｃｔｉｖａｔｅｄＴ－ｃｅｌｓ．Ｉｔｓｂｉｏｌｏｇｉｃａｌｅｆｅｃｔｓａｒｅｍｅｄｉａｔｅｄｂｙｂｅｉｎｇｂｏｕｎｄｔｏｓｐｅ...     

间氨基酚—过氧化氢—辣根过氧化物酶伏安酶联免疫分析新体系测定人血 …

提出间氨基酚（ＭＡＰ）－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）伏安酶联免疫分析新体系并用于人血清中总甲状腺素（Ｔ４）的测定。本方法以线性扫描二阶导数伏安法检测ＨＲＰ催化Ｈ２Ｏ２氧化ＭＡＰ的产物,用于游离ＨＲＰ和ＨＲＰ标记物的测定,灵敏度均坑于经典的ＥＬＩＳＡ显色光度法。本法对总甲状腺素测定的线性范围为０．５－３２０ｍｇ／Ｌ。用所建立的方法对人血清样品进行了测定,并与现行的ＥＬＩＳＡ显色光度法对照,二者     

过氧化氢氧化藏红T催化荧光法测定痕量铬（Ⅵ）

１引言在ＨＡｃ－ＮａＡｃ缓冲介质中，痕量铬（Ⅵ）对过氧化氢氧化藏红Ｔ的反应有强烈地催化作用，结果使藏红Ｔ的红色迅速减褪并伴随荧光减弱，建立了催化荧光法测定痕量铬（Ⅵ）的新方法。方法具有操作简便，灵敏度高，重现性好等特点，用于环境水样中铬（Ⅵ）的测定，结果满意。２实验部分２．１主要仪器与试剂日立Ｍ－８５０荧光分光光度计；９３０型荧光光度计；铬（Ⅵ）标准溶液：１　ｍｇ／Ｌ；藏红Ｔ溶液：４．０×１０－４ｍｏｌ／Ｌ；３０％Ｈ２Ｏ２溶液；ｐＨ４．２的ＨＡｃ－ＮａＡｃ缓冲溶液；水为二次去离子水。２．２实验方…     

稀土铕离子标记抗-乙型肝炎表面抗体

结合生命科学中生物活性物质的高灵敏度分析检测方法研究,组装了时间分辨激光荧光免疫分析装置;合成了稀土离子与蛋白质联接的双向螯合剂－二乙三胺五乙环酐（ＤＴＰＡＡ）;纯化了抗－乙型肝炎表面抗体;研究了Ｅｕ＾３－ＤＴＰＡＡ－抗－乙型肝炎表面抗体制备过程;确定了标记物制备的最佳条件;依据解离增强原理,采用时间分辩激光荧光光谱技术,对Ｅｕ（β－ＮＴＡ）３（ＴＯＰＯ）２螯合物的有关参数进行了测定。     

安替比林基重氮氨基-2,4-二硝基苯与银(Ⅰ)的显色反应及其应用

本文报道了安替比林基重氮氨基－２，４－二硝基苯（ＡＰＤＮＢＴ）与银（Ⅰ）的显色反应．在吐温－８０存在下，ｐＨ＝９．０～１０．０的范围内，试剂与银（Ⅰ）形成２∶１的配合物；配合物对试剂的最大吸收在４８５ｎｍ处，ε为７．２×１０４Ｌ－１·ｍｏｌ·ｃｍ－１；提出了消除阳离子干燥的银镜分离法；方法用于测定合成试样及照相显影液中银的含量，回收率为９６～１０３％，相对标准偏差小于２．０％．     

TOLUENE HYDROXYLATION WITH H_2O_2 CATALYZED BY TITANIUM SILICALITE(TS-1)

ＴＯＬＵＥＮＥＨＹＤＲＯＸＹＬＡＴＩＯＮＷＩＴＨＨ２Ｏ２ＣＡＴＡＬＹＺＥＤＢＹＴＩＴＡＮＩＵＭＳＩＬＩＣＡＬＩＴＥ（ＴＳ１）ＹａｎｇＷｕｂｉｎ，ＬｉｕＸｉｙａｏ（ＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＹａｎｓｈａｎＰｅｔｒｏｃｈｅｍｉｃａｌＣｏｒ...     

A Novel Method For Synthesis of Titanium Silicalite-2(TS-2)

Ｉｎ１９９０Ｒｅｄｄｙｅｔａｌ［１］ｆｏｒｔｈｅｆｉｒｓｔｔｉｍｅｒｅｐｏｒｔｅｄｔｈｅｓｙｎｔｈｅｓｉｓｏｆｔｉｔａｎｉｕｍｓｉｌｉｃａｌｉｔｅ－２（ＴＳ－２）ｗｈｉｃｈｐｏｓｓｅｓｓｅｓｓｉｌｉｃａｌｉｔｅ－２（ＭＥＬ）ｓｔｒｕｃｔｕｒｅｉｎｔｈ...     

1,9-二(4-安替比林偶氮)嘌呤酮与钯的显色反应及其用于光度法测定钯

１引言 新合成的试剂１,９－二［４－安替比林偶氮］嘌呤酮（ＢＡＰＤ）,在ｐＨ＝４．５０．的ＨＡｃ－ＮａＡｃ缓冲溶液中与Ｐｄ（Ⅱ）生成稳定的红色络合物,其λｍａｘ＝ ５１０ ｎｍ,把含量在０． １２～２．４ ｍｇ／Ｌ范围内与吸光度呈线性关系。据此建立了测定Ｐｄ（Ⅱ）的分析方法,并应用于电镀液和镀层中钯含量的测定。２实验部分２．１仪器与试剂 ＤＵ－７ ＨＳ型分光光度计（美国 Ｂｅｃｋｍａｎ公司）;７６０ ＣＲＴ型紫外－可见光分光光度计（上海第三分析仪器厂）;ＨＭ－２０Ｅ型酸度计（日本ＴＯＡ公司）。钯标准溶液…     

Carboranes as ligands for the preparation of organometallic Tc and Re Radiopharmaceuticals. Synthesis of [M(CO)(3)(eta-2,3-C(2)B(9)H(11))](-) and rac-[M(CO)(3)(eta-2-R-2,3-C(2)B(9)H(10))](-) (M = Re, (99)Tc; R = CH(2)CH(2)CO(2)H) from [M(CO)(3)Br(3)](2-)

A new and high yielding method for the synthesis of [M(CO)(3)(eta(5)-2,3-C(2)B(9)H(11))](-) and the bifunctional metal complexes, rac-[M(CO)(3)(eta(5)-2-R-2,3-C(2)B(9)H(10))](-) (R = CH(2)CH(2)CO(2)H), from [M(CO)(3)Br(3)](2)(-) (M = Re, (99)Tc) was developed. The general approach entailed the addition of nido-[(C(2)B(9)H(12))(-)], or the acid substituted analogue, to [M(CO)(3)Br(3)](2)(-) (M = Re, (99)Tc) in the presence of TlOEt in THF. It was also possible to prepare the reported products in water using sodium carbonate in place of TlOEt. The reported approach led to the preparation, and X-ray crystallographic structure determination, of the first Tc-carborane complex reported to date (a = 13.606(17) A, b = 10.685(13) A, c = 15.534(16) A, alpha = gamma = 90 degrees, beta = 111.84(2) degrees). Because of the stabilities of the metal complexes, and the fact that the compounds can be prepared in water, the bifunctional derivatives can be considered as novel synthons for the preparation of organometallic (99m)Tc and (186/188)Re radiopharmaceuticals.     

XAFS spectroscopic study of Tc2(O2CCH3)4X2 (X = Cl,Br)

Technetium dimers Tc₂(O₂CCH₃)₄X₂ (X =?Cl, Br) were synthesized and studied by X-ray Absorption Fine Structure spectroscopy (XAFS). EXAFS analysis gave for Tc₂(O₂CCH₃)₄Cl₂: d Tc-Tc =?2.18(1) Å, d Tc–Cl =?2.43(1) Å and for Tc₂(O₂CCH₃)₄Br₂: d Tc–Tc =?2.19(1) Å, d Tc-Br =?2.63(1) Å. The Tc Tc separations are in agreement with Raman studies while the Tc–X distances are somewhat larger. Comparison with other Tc(III) quadruply bonded dimers indicates that the carboxylate compounds exhibit larger Tc–Tc separations. The effect of the terminal ligand (nature and position) on the Tc–Tc separation is discussed.     

[Tc(NBCl2Ph)Cl2(Me2PhP)3] und [Tc(NBH3)Cl2(Me2PhP)3] – die ersten Technetium‐Komplexe mit Nitridobrücken zwischen Technetium und Bor

[Tc(NBCl₂Ph)Cl₂(Me₂PhP)₃] and [Tc(NBH₃)Cl₂(Me₂PhP)₃] – the First Technetium Complexes with Nitrido Bridges between Technetium and Boron [TcNCl₂(Me₂PhP)₃] reacts with BCl₂Ph or BH₃ · THF at low temperatures under formation of complexes containing a nitrido bridge between technetium and boron. The compounds are instable and decompose at room temperature under cleavage of the N–B bonds. The pale‐purple [Tc(NBCl₂Ph)Cl₂(Me₂PhP)₃] crystallizes in the orthorhombic space group Fdd2. The Tc≡N bond is only slightly lengthened by the formation of the N–B bond of 1.564(4) Å. However, a considerable lengthening of the Tc–Cl bond in trans position to the nitrido ligand is observed which can be attributed to an decreasing of the structural trans influence of the nitrido moiety. A similar structural feature can be found in [Tc(NBH₃)Cl₂(Me₂PhP)₃] which is the first structurally characterized transition metal complex containing a nitrido bridge to unsubstituted borane.     

Separation of molybdenum and technetium on DI-2-ethylhexylphosphoric acid (D-2-EHPA)-kieselguhr

The distribution ratio of Mo(VI) and Tc(VII) in different acid media on D-2-EHPA-kieselguhr was studied in batch experiments. From these data a separation procedure for Mo-Tc is proposed, which consists in the selective elution of Tc(VII) and Mo(VI) by reverse-phase partition chromatography. The D-2-EHPA-kieselguhr column can also be used as a solid phase for a(99m)Tc generator.     

Vapor Phase Vibrational Spectra for Re(2)O(7) and the Infrared Spectrum of Gaseous HReO(4). Molecular Shapes of Mn(2)O(7), Tc(2)O(7), and Re(2)O(7)

The Raman and infrared spectra of gas phase Re(2)O(7) are reported. The experimental vibrational spectra of molecular Tc(2)O(7) and Re(2)O(7) are compared with calculated spectra. The results of these studies agree with a nonlinear M-O-M bridge for Tc(2)O(7) and Re(2)O(7). For infrared intensity calculations, the point charge approximation is used, while for the Raman calculations a combination of bond and atom polarizabilities is adopted. Pure Re(2)O(7) was prepared from rhenium wire, but attempts to prepare it from rhenium powder and oxygen always led to infrared spectra showing serious contamination from a species containing an -OH linkage. Detailed experiments identified this molecule as HReO(4), a unique transition metal analogue of the perhalic acids, and a partial infrared spectrum of this molecule is reported.     

Syntheses of new ionic technetium(III) complexes containing four monodentate phosphine ligands. Crystal structures of trans-[Tc(PMe2Ph)4Cl2]PF6, trans-[Tc(PMe3)4Cl2]BPh4, and trans-[Tc(PMe3)4Cl2]PF6

New ionic technetium complexes of the type trans-[Tc(PR3)4Cl2]+ are synthesized by various methods. The simplest method is the reaction of [TcO4]- with the phosphine in methanol in the presence of a chloride salt. Compounds containing PMe2Ph and PMe3 are synthesized and characterized by crystallographic methods. The complexes containing the less bulky phosphine can be prepared from complexes containing the bulker phosphine. The compounds are paramagnetic, with two unpaired electrons. The complexes studied by X-ray diffraction methods are the trans isomers. [Tc(PMe2Ph)4Cl2]PF6 crystallizes in the monoclinic space group P2(1)/c, with a = 11.511(2) A, b = 26.713(7) A, c = 12.688(3) A, beta = 92.79(1) degrees, Z = 4, and R1 = 0.0574. [Tc(PMe3)4Cl2]BPh4 (II) crystallizes in the orthorhombic space group Pbcn, with a = 18.213(5) A, b = 22.950(5) A, c = 19.428(6) A, Z = 8, and R1 = 0.0691. [Tc(PMe3)4Cl2]PF6 crystallizes in the monoclinic space group P2(1)/c, with a = 18.152(7) A, b = 16.838(9) A, c = 18.090(6) A, beta = 106.63(1) degrees, Z = 8, and R1 = 0.0670. The compounds all have octahedral coordination, but an important tetrahedral deformation of the plane containing the Tc and the four P atoms is observed in each case. In II, the two independent Tc atoms are both located on 2-fold axes.     

Exploring the nitrosyl-approach: “Re(CO)2(NO)”- and “Tc(CO)2(NO)”-complexes provide new pathways for bioorganometallic chemistry

Nitrosylation reactions are rare in the context of low valent Re(I)- and Tc(I)-tricarbonyl complexes so far. We herein describe a method for the conversion of a “M(CO)₃-moiety” (M = Re, Tc) into a dicarbonyl-nitrosyl moiety “M(CO)₂NO”, the synthesis of important precursor complexes and intermediates and possible applications for this new kind of Re- and Tc-chemistry.The behavior of the complex [ReCl₃(CO)₂(NO)]⁻ in water was studied in detail and compared to that of [ReCl₃(CO)₃]²⁻. Contrary to the conversion of [ReCl₃(CO)₃]²⁻ to the mixed aquo-carbonyl complex [Re(OH₂)₃(CO)₃]⁺ in water, one chloride remains initially bound to the metal center in the dicarbonyl-nitrosyl complex, making [ReCl(OH₂)₂(CO)₂(NO)]⁺ the main species for further reactions. In this context, we isolated and characterized the complex [Re(μ₃-O)(CO)₂(NO)]₄. Examples of complexes with different bi- and tridentate ligands based on ReCl₃(CO)₂(NO)]⁻ are discussed.For the development of potential new radiopharmaceuticals we also adapted the nitrosylation technique to the n.c.a. level with ^99mTc. [^99mTc(OH₂)₃(CO)₃]⁺ served as starting material to form a ^99mTc(CO)₂(NO)-core. Labelling reactions with ligands such as iminodiacetic acid (IDA), nitrilotriacetic acid (NTA) and diethylenetriamine pentaacetic acid (DTPA) were performed, resulting in the complexes [^99mTc(IDA)(CO)₂(NO)], [^99mTc(NTA)(CO)₂(NO)] and [^99mTc(DTPA)(CO)₂(NO)]. In this way, the “nitrosyl-approach” adds a new and challenging synthetic tool to the already established organometallic chemistry of Re- and Tc-tricarbonyl complexes.     

Reduction of Pertechnetate by Chemical and Photochemical Approaches and Incorporation of Tc(IV) into Titanium Dioxide

Technetium-99 is a prevalent fission product from nuclear waste. The long half-life (211,000 yr) and environmental mobility of pertechnetate (TcO₄⁻) render Tc particularly challenging to isolate and stabilize. Here we present two approaches for development of potential wasteforms using titanium dioxide, TiO₂. Approach 1 is a low temperature chemical synthesis of TiO₂ doped with Tc(IV) from TcO₄⁻ intended to mimic the Tc waste stream from the UREX family of separations and removes 98.5 % of the Tc, mainly present as edge-shared Tc(IV) pairs. Approach 2 utilizes TiO₂ to photocatalytically reduce TcO₄⁻ to Tc(IV) stabilized on the surface of or within the TiO₂ lattice. The %Tc removed from solution and adsorbed to TiO₂ is pH dependent, with the maximum Tc(IV) adsorbed at pH 3–4 as either TcO₂ or edge-sharing Tc(IV) octahedra. The Tc(IV)-TiO₂ composites materials formed by both approaches are suitable for consolidation into a dense wasteform by Hot Isostatic Pressing (HIPing).     

Layer-engineering of high-Tc superconductors: (Cu,Mo)Sr2(Ce,Y)4Cu2O13+delta with a quadruple-fluorite-layer block between CuO2 planes

Among high-Tc superconductive copper oxides, there have been known phases that contain fluorite-structured layers as an additional "blocking block" between adjacent CuO2 planes. Here, we report that even a phase with the CuO2 planes separated by a 12-A thick quadruple-fluorite-layer block can be synthesized in a single phase and strongly oxygenated form to exhibit superconductivity with a Tc value as high as 55 K. The new phase is the fourth member of the (Cu,Mo)Sr2(Ce,Y)sCu2O(5+2s+delta) or (Cu,Mo)-12s2 homologous series. Comparison with the previously known s = 1, 2, and 3 members of the series reveals the amazing conclusion that Tc remains essentially unaffected upon inserting additional fluorite-structured layers between the two CuO2 planes as long as the hole-doping level of the planes is kept constant.     

Synthesis and characterization of technetiumtetrakis(acetonitrile)bis(triphenylphosphine) cationic complexes

A new route to low-valent technetium complexes containing multiple acetonitrile ligands has been developed. The reduction of TcCl(4)(PPh(3))(2) with zinc metal dust in acetonitrile results in the formation of [Tc(CH(3)CN)(4)(PPh(3))(2)][Zn(2)Cl(6)](1/2). The hexafluorophosphate salt of the analogous Tc(II) cation can be prepared via chemical oxidation of the Tc(I) species, and the Tc(I) cation can be regenerated via chemical reduction. The compounds have been characterized in the solid state via single-crystal X-ray crystallography, and in solution via a combination of spectroscopic techniques and cyclic voltammetry. The structural parameters found in the two complexes are similar to each other; however, the difference in oxidation state is reflected, as expected, in the spectroscopic results. The electrochemical data, obtained from cyclic voltammograms of Tc(CH(3)CN)(4)(PPh(3))(2)](PF(6))(n)() (n = 1,2), mirror the synthetic results in that both compounds possess a reversible redox couple at -0.55 V versus ferrocene, which has been assigned to the Tc(II)/Tc(I) couple.