酸性镀铜体系的交流阻抗研究

研究了基础溶液（０．３ｍｏｌ／ＬＣｕＳＯ４＋１．９４ｍｏｌ／ＬＨ２ＳＯ４）以及添加６０ｍｇ／ＬＣｌ＾－，３００ｍｇ／ＬＯＰ－２１，３０ｍｇ／ＬＰＥＧ－６０００，１０ｍｇ／Ｌ２－噻唑啉基－二硫丙烷酸钠（代号ＴＤＹ，自合成添加剂）后体系的阻抗行为，结果表明：１）Ｃｌ＾－在铜沉积中有增大阴极极化的作用；２）铜离子的放电为分步反应；即Ｃｕ＾２＋→Ｃｕ＾＋；Ｃｕ＾＋→Ｃｕ（吸附）→Ｃｕ（晶格），在含有Ｃｌ＾     

银（I）—硫脲—四正丁基溴化铵体系电致化学发光法测定水中痕量银

本研究了银（Ｉ）－硫脲－四正丁基溴化铵体系的电致化学发光（ＥＣＬ）。发现在正矩形脉冲下，银对含有硫脲的ＴＢＡＢｒ的溶液ＥＣＬ有明显催化作用，银（Ｉ）的浓度在１．４×１０＾－８－３．５×１０＾－６ｍｏｌ／Ｌ范围内与有ＥＣＬ强度呈良好线性关系。检出限为９．０×１０＾－９ｍｏｌ／Ｌ，相对标准偏差为５％。用于天然水中银的测定，获得较满意的结果。     

催化动力学光度法测定痕量苯酚

研究了在硫酸介质中苯酚对Ｉ＾－１催化Ｃｅ＾４＋－Ａｓ（Ⅲ）反应的抑制作用及其动力学条件。建立了用催化动力这光度法测定痕量苯酚的新方法，结果表明，在０．００１ｍｏｌ／ＬＣｅ（ＳＯ４）２，０．００１２５ｍｏｌ／Ｌ，Ａｓ２Ｏ３，０．０１ｍｇ／Ｌ，ＫＩ，０．０１２５ｍｏｌ／Ｌ，Ｈ２ＳＯ４和０．１３％（ｗ／ｖ）ＮａＣｌ溶液中测定苯酚，其表面摩尔吸光系数为２．１×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，线性范围     

差分脉冲吸附溶出法测定痕量铜

本文报道一种差分脉冲吸附溶出测定痕量铜的方法，在３．０×１０＾－５ｍｏｌ／Ｌ双硫腙－０．５ｍｏｌ／Ｌ，ＮａＯＨ－０．０１ｍｏｌ／Ｌ，ＥＤＴＡ底液中，在汞膜电极上于－０．５Ｖ，吸附富集铜－双硫腙配合物３ｍｉｎ，然后记录其在一０．８７Ｖ的差分脉冲阴极溶出峰，溶出峰高与铜浓度在０．５～１０ｎｇ／ｍＬ范围内有线性关系（ｒ＝０．９９８），检测限为０．３ｎｇ／ｍＬ。应用本方法测定地质化探化试样，电镀废水中的痕     

Cu（I）的高灵敏度显色反应的研究Ⅱ.及其在绿茶测定中的应用

本文研究了在硫酸介质中，Ｃｕ（Ｉ）－ＳＣＮ＾－－罗丹明Ｂ体系当有明胶和聚乙醇辛基苯基醚存在时的显色反应。该反应的λｍａｘ＝５９５ｎｍ，ε＝２．０％１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，铜在０～５．００μｇ／２５ｍＬ范围内具有良好的线性关系。据此拟定的分析方法，用于测定绿茶中的痕量铜，选择性好，灵敏度高，结果满意。     

人低密度脂蛋白^125I固相标记—Iodogen法

本文报道了利用固相氧化剂１，３，４，６，－四氯－３α、６α－二苯基甘脲（Ｉｏｄｏｇｅｎ）对人血清低密度脂蛋（ＬＤＬ）进行＾１２５Ｉ标记的方法，结果表明：＾１２５Ｉ－ＬＤＬ的比放射笥为１８５－５１８ｃｐｍ／ｎｇＬＤＬ，游离＾１２５Ｉ含量在０．２７－１．７５％之间，脂质记率＜１％，＾１２５Ｉ－ＬＤＬ浓度２５０－７５０μｇ／ｍｌ＾１２５Ｉ－ＬＤＬ的生物活性受体实验证实与天然与天然４脂蛋白一致，符合脂蛋白     

冠醚存在下稀土络合物荧光体系的荧光增强效应

本详细研究了冠醚对Ｅｕ－ＴＴＡ荧光体系的增敏作用和稀土离子Ｄｙ＾３＾＋或Ｈｏ＾３＾＋对Ｅｕ－ＴＴＡ－冠醚体系的荧光强增效应。对Ｅｕ－ＴＴＡ－冠醚和Ｅｕ－Ｄｙ（或Ｈｏ）－ＴＴＡ－冠醚体系，Ｅｕ的浓度分别在１．０×１０＾－＾８－４．０×１０＾－＾６ｍｏｌ／Ｌ，１．０×１０＾－＾９－１．０×１０＾－＾７ｍｏｌ／Ｌ和１．０×１０＾－＾８－９．０×１０＾－＾６ｍｏｌ／Ｌ范围内与体系的荧光强度呈线性关系，检     

抑制型离子色谱快速测定I^—,SCN^—,S2O^2—3

本用抑制型离子色谱，薄壳强碱性阴离子交换树脂为分离柱，柱温为３０±１℃，在常规淋洗液ＮａＨＣＯ３－Ｎａ２ＣＯ３中加入对－硝基苯酚作为有机改进剂，测定了Ｉ＾－、ＳＣＮ＾－、Ｓ２Ｏ＾２－３离子。它们有良好的线性关系，三种离子浓度在５．０～３０．０ｍｇ／Ｌ范围内其相关系数分别为：ｒＩ＾－０．９９９４、ｒｓｃｎ＾－０．９９０６、ｒｓ２ｏ＾２－３０．９９８５，检测限分别为：Ｉ＾－０．１７ｍｇ／Ｌ、ＳＣＮ＾     

荧光素荣光猝灭法测定向量磺酸根

报道了荧光素为指示剂荧光猝灭法间接测定ＩＯ＾－３的方法。在０．０５ｍｏｌ／ＬＨ２ＳＯ４介质中，Ｉ＾－和ＩＯ＾－３反应生成Ｉ２，Ｉ２与荧光素反应，使荧光素荧光猝灭。该法灵敏度高，选择性好，操作简单，用于含碘食盐，低钠食盐中微量ＩＯ＾－３的测定，结果满意。     

邻氨基苯酚与漆树漆酶反应的微量热法研究

在０．１ｍｏｌ／Ｌ的磷酸盐缓冲溶液（ｐＨ７．４）中，用微量热法测定了２９８．１５Ｋ时漆树漆酶与邻氨基苯酚反应的摩尔反应焓ΔｒＨｍ＝２５２．２１±３．５９ｋＪ／ｍｏｌ，米氏常数Ｋｍ＝７．７７×１０－３ｍｏｌ／Ｌ和表观一级反应速率常数ｋ１＝７．２３×１０－３ｓ－１，及此条件下邻氨基苯酚作底物时的漆酶活性值ＥＡ＝０．１９０（ＩＵ）。     

Influence of the Position of the Connecting Spacer of the Chromophore on the Nonlinear Optical Response

A new chromophore, C1 , based on a similar DπA‐structure as in the FTC ‐chromophore but with a hydroxyalkyl spacer perpendicular to the direction of the dipole moment was synthesized. Both chromophores and the CLD ‐chromophore were used to prepare high T_g nonlinear optical vinyl polymers. The influence of the position of the spacer on the DπA‐system on the NLO response of the resulting polymers was investigated.

     

可溶性聚酰亚胺电化学反应机理的研究

本文研究了三种可溶性聚酰亚胺（ＰＩ）在机溶剂和水溶液中的电化学行为，发现ＰＩ在有机溶剂中的电化学行为明显不同于水溶液，利用红外光谱技术才半经验发子轨道计算方法，结合电化学测试的结果，确证了ＰＩ的电化学反应的机理。     

An improvement of the resolution of the identity approximation for the formation of the Coulomb matrix

A straightforward modification of the resolution of the identity (RI) approximation to the Coulomb interaction is described. In the limit of basis sets that are dominated by high angular momentum functions the observed speedups in realistic test systems reach a factor of 2 compared to the standard RI algorithm, and a factor of up to 300 compared to the standard algorithm to form the Coulomb matrix. More moderate savings on the order of 0-20% are obtained for the more commonly used smaller basis sets. A series of test calculations is reported to illustrate the efficiency of the algorithm.     

Determination of the mechanism of the oxidation of the trichloromethyl radical by the photolysis of chloral in the presence of oxygen

The photooxidation of chloral was studied by infrared spectroscopy under steady-state conditions with irradiation of a blackblue fluorescent lamp (300 nm < λ < 400 nm, λ_max = 360 nm) at 296 ± 2 K. The products were hydrogen chloride, carbon monoxide, carbon dioxide, and phosgen. The kinetic results reveal that the reaction proceeds via chain reaction of the Cl atom: The results lead to the conclusion that mechanism (B) is confirmed to be more likely than mechanism (A), which was favored at one time by Heicklen for the mechanism of the oxidation of trichloromethyl radicals by oxygen molecules: The ratio of the initial rates of CO and CO₂ formation gave k₇/k₆ = 4.23M^?1, and the lower limit of reaction (5) was found to be 3.7 × 10⁸M^?1 sec^?1.