碘离子选择电极在动力学分析中的应用 Ⅰ.催化电势动力学测锆法研究

本文报道采用碘离子选择电极,系统研究了锆于BO_3~--I~-反应中的定量催化特性,建立了催化电势动力学间接测痕量锆的方法。结果表明,本法专属性较高,55种阴、阳离子均不干扰测锆。     

2-[1-芳酰基-1-(芳基偶氮) 亚甲基] 苯并噻唑啉的合成

本实验通过2-(1-芳甲酰基亚甲基)苯并噻唑啉和芳基重氮盐反应, 高产率地制得一系列2-[1-芳酰基-1-(芳基偶氮)亚甲基]苯并噻唑啉。     

多乙苯脱氢制多乙烯苯氧化铁催化剂的研究助剂钾,铈对催化性能的影响

研制了适合多乙苯脱氢制多乙烯苯的Ｆｅ－Ｋ－Ｃｅ复合型脱氢催化剂．助剂钾以钾霞石（ＫＡｌＳｉＯ４）方式引入，既克服了钾的大量流失，又保留了钾碱的抗积炭性能，使催化剂活性稳定．另一助剂ＣｅＯ２的加入对催化剂中的各组分起到了一定的分散作用，使催化剂晶粒度变小，并且提高了活性组分Ｆｅ２Ｏ３的还原温度，因而可增强催化剂的抗还原能力．     

纳米TiO2膜用于光催化氧化测定化学需氧量的研究

A photocatalytic oxidation method for determination of chemical oxygen demand （COD） using nano-TiO2 film, based on the use of a nano-TiO2-Ce（SO4）2 system and electrochemical detection, was proposed. The technique was originated from the direct determination of the Ce（Ⅲ） concentration change resulting from photocatalytic oxidation of organic compounds. Ce（Ⅲ）, which was produced by photocatalytic reduction of Ce（SO4）2, could be measured at a multi-walled carbon nanotubes （MWNT） chemically modified electrode （CME）. The COD values by this method were calculated from the differential pulse voltammetry （DPV） current of Ce（Ⅲ） at the CME. Under the optimal operation conditions, the detection limit of 0.5 mg·L^-1 COD with the linear range of 1-600 mg·L^-1 was achieved. This method was also applied to determination of various COD of ground water and wastewater samples. The resuits were in good agreement with those from the conventional COD methods, i.e., permanganate and dichromate ones.     

含2,4—二硫代乙丙酰脲分子片卡宾铁羰基簇合物的合成和结构

Ｆｅ３（ＣＯ）１２与５个２，４－二硫代乙内酰脲ＳＣＮＨＣ（Ｒ１）（Ｒ２）Ｃ（Ｓ）ＮＨ应制得通式为Ｆｅ３（ＣＯ）８（μ３－Ｓ）２（Ｌ）含卡宾配体的５个新铁羰基簇合物（１～５）对其进行了元素分析，ＩＲ、ＨＮＭＲ和ＭＳ表征，并用Ｘ射线衍射法测定了簇合物３的晶体和分子结构，表明２，４－二硫代乙内酰脲分子片配位基：ＣＮＨＣ（ＣＨ３）２Ｃ（Ｓ）ＮＨ的卡宾碳具有ｓｐ＾２成键特征，其Ｃ－Ｆｅ键长０．１８９８ｎｍ，     

β-蒎烯和马来酸酐的反应及产物表征

研究了β-蒎烯和马来酸酐的烯反应、溶剂中自由基共聚反应和本体热共聚反应,得到了β-蒎烯和马来酸酐烯反应产物和共聚产物,并用IR、1H NMR、13C NMR、GPC、DSC进行表征,研究了引发剂浓度、溶剂体系、单体配比、温度等因素对产物的影响.对聚合物进行皂化改性,测量了皂化物浓度对水表面张力的影响.     

纳米CoHCF修饰电极的制备及其对血红蛋白的电化学测定研究

A cobalt hexacyanoferrate （CoHCF） nanoparticle （size ca. 60 nm） chemically modified electrode （CME） was fabricated and the electrochemical behavior of hemoglobin （Hb） at this nanosized CoHCF CME was studied. In comparison with a bare glassy carbon electrode （GCE） and a general CoHCF CME electrodeposited in a traditional manner, the present nanosized CoHCF CME performed efficiently electrocatalytic reduction for Hb with relatively high sensitivity, stability, and longlife, Combined with liquid chromatography （LC）, the nanosized CoHCF CME was used as the electrochemical detector of Hb in the established flow injection analysis-electrochemical determination （FIA-ECD） system. The peak current was a linear function of concentrations in the range from 2.5×10^-8 to 5.0×10^-6mol/L for Hb, with detection limit of 1.4×10^-8 mol/L. The FIA-ECD system has been successfully applied to assess the Hb content of clinic blood samples with advantages of sensitiveness, speediness, easy control and small sample-consumption.     

Preliminary study on dual fluorescence behavior of porphyrin

It is well known that porphyrin derivatives play a key role in the primary process of photo-synthesis[1], in which porphyrins directly absorb the sunlight or indirectly acquire excitation en-ergy from light-harvesting antenna system to reach their excited state, and then donate electrons to quinone acceptors to yield a series of charge-separated species. In general, only first singlet ex-cited state of porphyrins is involved in energy transfer process[2]. However, highly excited state (S2 stat…