包结化合物对痕量CO(Ⅱ)的富集作用

以环氧氯丙烷作交联剂与β－环糊精反应，今成了环糊精聚合物树脂。该树脂能与4－[（3，5－二溴－2－吡啶）偶氮]－2－甲基－1，5一、二氨基苯（3，5－diBr－PADAT）形成稳定的包结化合物，在适当的条件下，它可以选择性地富集Co（Ⅱ），结果令满意。     

聚合树脂富集分离水样中痕量Mg（Ⅱ）

以环氧氯丙烷为交联剂，与β－环糊精反应，生成一种具有三维网状结构且不溶于水的大分子物质。该物质与铬黑Ｔ显色剂发生包结作用，形成包结聚合树脂。用此树脂富集水中痕量Ｍｇ（Ⅱ），结果令人满意。     

水中痕量Fe(Ⅲ)富集方法的研究

本文以环氧氯丙烷为交联剂，与β-环糊精反应，生成一种具有三维网状结构并不溶于水的大分子物质。该物质与显色剂二甲酚橙作用，络合成包结树脂。用该村服富集水中痕量Fe（Ⅲ），结果令人满意。     

水样中痕量Ca（Ⅱ）富集方法的研究

本文以环氧氯丙烷为交联剂，与β－环糊精反应，生成一种具有三维网状结构且不溶水水的稳定大分子生物。该物质与络合剂酸性铬蓝Ｋ作用，形成包对脂。用该树脂富集水中痕量Ｃａ（Ⅱ），取得了较满意的结果。     

水中痕量Fe（Ⅱ）富集方法的研究

本文以环氧氯丙烷为交联剂，与β－环糊精反应，生成一种具有三维网状结构产 不溶于水的大分子物质。     

新型交联树脂富集水中痕量Fe(Ⅲ)

以环氧氯丙烷为交联剂,与β-环糊精反应,合成一种具有三维网状结构且不溶于水的交联聚合物.该聚合物与磺基水杨酸作用,形成稳定的包结树脂.用该树脂富集水中痕量Fe(Ⅲ),富集能力强,回收率高.     

水样中痕量Cr(VI)的富集及测定

本文以环氧氯丙烷做交联剂，与β-环糊精反应，合成一种具有三维网状结构并不溶于水的大分子物质。该物质与显色剂朱基萤光酮发生包结作用，形成包结树脂。用此树脂富集痕量Cr（VI），结果令人满意。     

包结化合物对痕量金属离子的富集作用

本文以环氧氯丙烷为交联剂与β-环糊精反应，合成了环糊精聚合物。该聚合物能与2一萘偶氮-8-羟基喹啉-5-磺酸形成稳定的包结化合物，在适当的条件下，它可以选择性地富集锌离子，结果令人满意。     

痕量汞离子富集方法的研究

本文以环氧氯丙烷为交联剂与β－环糊精发生反应,合成一种具有三维网状结构并不不于的大分子物质。将物质与显色剂ＰＡＲ作用,生成一种包结化合物树脂。用该树脂富集痕量汞离子,令人工满意。     

乳状液膜迁移、分离Mn（Ⅱ）的研究

用二（２－乙基己基）磷酸酯－ＳＰＡＮ８０－甲苯乳状液膜体系研究了Ｍｎ（Ⅱ）的迁移行为，确定了完全、快速、迁移Ｍｎ（Ⅱ）的迁移行为、制乳及迁移条件，在此条件下，Ｍｎ（Ⅱ）与Ｆｅ（Ⅱ）可完全分离．     

Measurement of trace lead (II) in water samples with biomacromolecule heparin modified electrode

A new method for electrode modification and accumulation with a biomacromolecule and subsequent voltammetric quantittion of metal ions is described. Heparin is used as the surface modifier, and the method is based on formation of the heparin complex of lead (II). The voltammetric responses were evaluated with respect to electrolyte, pH, preconcentration time, and lead concentration. The electrode composition, voltammetric wave form and other variables have also been taken into account. A detection limit of 3.0×10⁻⁹ mol/L has been obtained by preconcentration for 20 min. The method is sensitive, simple and relatively rapid, with a relative standard deviation of 5.2% at the 1.0×10⁻⁷ mol/L level. Supported by the Trants-Century Training Program Foundation for the Talents from the State Commission of Education of China: the national Natural Science Foundation of China and the Opening Laboratory Foundation of Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Li Huiling: Born in July 14, 1972. Master of Science.     

Crystal structure and surface photo-electric property of Mn（Ⅱ） coordination supramolecules

Two Mn（Ⅱ） coordination supramolecules, [Mn2（C8HTO2）4（phen）2（p-H20）] （1） and [Mn2（btec）（phen）2（H2O）6]·2H2O （2） （phen=1,10-phenanthroline, H4btec=1,2,4,5-benzenetetracarboxylic acid）, were synthesized by hydrothermal method. The crystal structures of the complexes were determined by X-ray single crystal diffraction. The result indicates that （1） and （2） are both binuclear Mn（Ⅱ） complexes. The existence of hydrogen bonds makes the binuclear complexes become further connected to coordination supramolecules, which possess 1D and 3D infinite structures respectively. The complexes were identified by IR, UV-Vis, surface photovoltage spectrum （SPS） and field-induced surface photovoltage spectrum （FISPS）. The results of SPS for the complexes indicate that they both exhibit positive surface photovoltage response bands in the range of 300-600 nm. The SPS phase spectrum and FISPS of complexes indicate that they show certain p-type semiconductor characteristic. However, the intensity, position and number of the SPV response bands are different obviously. The difference of the SPV response bands is mainly attributed to the different structures of the complexes and the different coordination environment of Mn（ll） in the two complexes. This paper discusses the action of hydrogen bonds in the construction of the supramolecule and the change on the surface photovoltage of complex in different coordination environment.     

催化褪色光度法测定痕量锰（II）

研究在酸性介质中及活化剂氨三乙酸存在条件下,锰(Ⅱ)对高碘酸钾氧化酸性品红褪色的反应具有显著的催化作用,利用此性质,建立了测定痕量锰(Ⅱ)的新体系.确定了反应条件及共存离子的影响,方法的灵敏度为5.24×10-11gMn/mL,锰(Ⅱ)的浓度在0.20～19.9ng/mL范围内,△A与Mn(Ⅱ)含量呈良好的线性关系.该法用于池塘水及面粉中锰的测定,获得了满意的结果.     

Synthesis and magnetic properties of one-dimensional Mn（Ⅱ） complexes linked by dithiooxalato

Three dithiooxalato (Dto) bridging one-dimensional Mn(Ⅱ) complexes [Mn(L)Dto](L=Phen (1), Bpy (2) and en (3)) were synthesized. All of the complexes have the similar one-dimensional structure through Dto bridge. The measurement of the variable temperature magnetic susceptibility of complex 1 showed that there are weak antiferromagnetic interactions between the Mn(Ⅱ) ions.     

Mn(Ⅱ)催化臭氧氧化去除水中邻苯二甲酸二甲酯的研究

进行Mn(Ⅱ）催化臭氧氧化去除水中邻苯二甲酸二甲酯的研究，分析催化剂用量，溶液pH值对邻苯二甲酸二甲酯降解效果的影响，结果表明我国采用Mn（Ⅱ）催化臭氧氧化邻苯二甲酸二甲酯是可行的。     

Synthesis and magnetic properties of one-dimensional Mn(II) complexes linked by dithiooxalato

Three dithiooxalato (Dto) bridging one-dimensional Mn(II) complexes [Mn(L)Dto](L = Phen (1), Bpy (2) and en (3)) were synthesized. All of the complexes have the similar one-dimensional structure through Dto bridge. The measurement of the variable temperature magnetic susceptibility of complex 1 showed that there are weak antiferromag-netic interactions between the Mn(II) ions.     

Electrochemical determination of trace amounts of lead (II) and cadmium (II) at a calix[6]arene modified carbon paste electrode

An electrochemical method for the simultaneous determination of lead(II) and Cadmium(II) with a calix[6]arene modified carbon paste electrode (CPE) has been developed. Pb²⁺ and Cd²⁺ were accumulated at the surface of the modified electrode via formation of chemical complexes with calix[6]arene, and reduced at 1.40 V. During the following anodic potential sweep, reduced lead and cadmium were oxidized, and two well-defined striping peaks appeared at about −0.60 V and −0.84 V. Compared with a bare carbon paste electrode, the calix[6]arene modified CPE greatly improves the sensitivity of determining lead and cadmium. The stripping peak currents change linearly with the concentration of Pb²⁺ 3.0×10⁻⁸–8.0×10⁻⁶ mol·L⁻¹ and with that of Cd²⁺ 6.0×10⁻⁸–1.0×10⁻⁵ mol ·L⁻¹. The detection limits of Pb²⁺ and Cd²⁺ are found to be 8.0×10⁻⁹ mol·L⁻¹ and 2.0×10⁻⁸ mol·L⁻¹, respectively. The modified carbon paste electrode was applied to determine trace levels of lead and cadmium in water samples. Comparing with that of atomic absorption spectrometry, the results suggests that the calix[6]arene modified CPE has great potential for the practical sample analysis. Foundation item: Supported by the National Natural Science Foundation of China (60171023) Biography: JI Xiao-bo (1980-), male, Master, research direction: electroanalytical chemistry.     

硫酸铵-硫氰酸铵-乙醇体系萃取分离钯(II)

研究了硫酸铵存在下,硫氰酸铵-乙醇体系萃取分离钯(II)的行为.试验表明,钯(II)与SCN-形成的Pd(SCN)2-4很容易被萃取到乙醇相中,当溶液中硫酸铵、硫氰酸铵、无水乙醇浓度分别为0.3g/mL、0.02g/mL、0.30mL/mL,pH=3.0时,能使钯(II)的萃取率达到100%,Al(III)、Mn(II)、Fe(II)、U(VI)、Ni(II)、V(V)基本不被萃取,实现了钯(II)与上述离子的分离.