NO在Cs／Ru（1010）表面上吸附的ARUPS研究

在１５０Ｋ的低温下，ＮＯ在清洁的Ｒｕ（１０１０）表面上的吸附，Ｈｅｌｌ－ＡＲＵＰＳ显示在Ｅ以下９．３ｅＶ（５σ＋１π）和１４．６ｅＶ（４σ）处有两个峰，表明ＮＯ在Ｒｕ（１０１０）表面上是分子吸附，ＮＯ在Ｃｓ／Ｒｕ（１０１０）表面上的吸附，ＡＲＵＰＳ测得在Ｅ以下６．２，９．２，１１．１，１２．４和１４．９ｅＶ处有５个峰，和Ｎ２Ｏ气相的ＵＰＳ谱比较认定它们是Ｎ２Ｏ和ＮＯ共存的结果，表明ＮＯ在Ｃｓ／Ｒｕ     

四—（对—羟基苯基）卟啉在水／三氟乙酸溶液中J—聚集的光谱研究

本文研究了四－（对－羰基苯基）卟啉（ＴＣＰＰ）在Ｈ２Ｏ／ＣＦ３ＣＯＯＨ、Ｈ２Ｏ／ＣＣＩ３ＣＯＨ和Ｈ２Ｏ／ＣＨ３ＣＯＯＨ溶液中的ＵＶ－Ｖｉｓ吸收光谱、荧光光谱和拉曼光谱。实验表明,ＴＣＰＰ在Ｈ２Ｏ／ＣＨ３ＣＯＯＨ和Ｈ２Ｏ／ＣＣＩ３ＣＯＯＨ溶液中以分子态的Ｎ－质子化卟啉Ｈ８ＴＣＰＰ＾２＋存在,而在Ｈ２Ｏ／ＣＦ３ＣＯＯＨ中则形成Ｈ８ＴＣＰＰ＾２＋的Ｊ－聚集体。Ｊ－聚集体显示,ＵＶ－Ｖｉｓ吸收光谱和荧光光     

[Mo3S7]分子簇和聚合簇合物的振动光谱和电子光谱

本文报道了分立簇「Ｍｏ３Ｓ７（ｄｔｐ）３Ｉ」１及它的四聚物｛「Ｍｏ３ＳＵ（ｄｔｐ）３」４Ｉ｝．｛（ＨｇＩ３）４．Ｋ｝２（ｄｔｐ＝Ｓ２Ｐ（ＯＣ２Ｈ５）＾－２的ＩＲ,Ｒａｍａｎ和ＵＶ－Ｖｉｓ光谱,并讨论分立的「Ｍｏ３Ｓ７（ｄｔｐ）３Ｉ」在四聚后这些光谱的变化。     

用￣1H NMR法研究［Co（Xacac）＿2（Me－en）］ClO＿4的重氢化

应用￣１ＨＮＭＲ技术推定了新合成的二（３－取代Ｘ基－２，４－戊二酮）．Ｎ－甲基乙二胺合钴（Ⅲ）配合物：［Ｃｏ（Ｘａｃａｃ）＿２（Ｍｅ－ｅｎ）］ＣｌＯ＿４（Ｘ＝ＣＨ＿３、Ｃｌ、ＮＯ＿２）的Δ（Ｒ）∧（Ｓ）和Δ（Ｓ）∧（Ｒ）异构体的空间构型，测定了各配合物异构体手性配位氮原子上的重氢化速率常数ｋ＿Ｄ值（３４．０℃）．结果表明，取代基Ｘ对ｋ＿Ｄ值有着显著影响。     

取代苯胺基亚胺二茂铁类化合物莫斯鲍尔谱及分子光谱研究

本文报道了６种取代苯胺基亚胺二茂铁类化合物Ｒ－Ｎ＝ＣＨ－Ｆｅ（－Ｆｅ为二茂铁基，Ｒ为－Ｃ６Ｈ４Ｘ，（Ｘ＝Ｈ，４－Ｂｒ，４－ＯＨ，２－ＣＨ３，４－ＣＯＯＨ）及４－ＮＨＣ６Ｈ４ＮＯ２）的Ｍｏｓｓｂａｕｅｒ谱数据，其化学位移分别为（ｍｍ．ｓ＾－１）：０．３２３，０．３３２，０．３３８，０．３２４，０．３１５和０．３１０。其四极矩分裂值分别为（ｍｍ．ｓ＾－１）：２．２６３，２．２８５，２．２８７，２．２１     

ZrO2在Rh/γ-Al2O3催化剂中对NO催化还原反应的作用

测定了含ＺｒＯ２的Ｒｈ／γ－Ａｌ２Ｏ３催化剂上ＮＯ＋Ｃ２Ｈ４和ＮＯ＋Ｃ２Ｈ４＋Ｏ２的反应活恬性,并应用ＴＰＲ、ＸＲＤ、ＢＥＴ比表面等表征了ＺｒＯ２的加入方式和晶型对Ｒｈ／γ／Ａｌ２Ｏ３催化剂活性和结构的影响。结果表明,ＺｒＯ２的加入一定程度也抑制了Ｒｈ＾３＋与γ－Ａｌ２Ｏ３之间的相互作用和Ａｌ２Ｏ３的相变,提高了催化剂的热稳定性,明显提高了８５０℃老化样品的ＮＯ＋Ｃ２Ｈ４反应活性。对于ＮＯ＋Ｃ２     

合成抗孕酮新药RU-486中间体3,3-乙撑二氧-5α,10α及5β,10β-环氧-Δ~(9(11))-雌烯-17α(1-丙炔基)-17β-羟基的~1H和~(13)C NMR谱线全归属

用１Ｄ及２ＤＮＭＲ技术（ＣＯＳＹ，ＴＯＣＳＹ，ＨＭＱＣ及ＨＭＢＣ）归属了合成抗孕酮新药ＲＵ－４８６中间体３，３乙撑二氧５α，１０α及５β，１０β环氧－Δ９（１１），雌烯１７α（１－丙炔基）１７β羟基的１Ｈ和１３ＣＮＭＲ谱线．     

共振拉曼光谱研究卟啉二酸H4^2＋TSPP的J—聚集

用共振拉曼光谱和ＵＶ－Ｖｉｓ吸收光谱考察了离子强度对四－（对－磺酸基）苯基卟啉二酸（Ｈ４＾２＋ＴＳＰＰ）聚集体形成的影响,实验表明加入少量的ＮａＣｌＯ４有助于聚集体的形成,而ＮａＣｌＯ４的浓度过高则倾向于形成单体。ＮａＣｌＯ４的加入不改变聚集体中分子的才排列方式,但高浓度的ＮａＣｌＯ４可能在聚集体中引入某种缺陷,使激发态发生局域化。我们还得到了具有宏观尺寸的纤维状Ｈ４＾２＋ＴＳＰＰ沉淀,并研究了其     

析相光度法测定铜（Ⅱ）的研究

本文研究了Ｃｕ－ＰＥＧ－ＤＤＴＣ（铜试剂）（ＮＨ４）２ＳＯ４体系的析相光度法并应用于测定Ｃｕ。最宜酸度为３．６－９．０（ＮａＡｃ－ＨＡｃ，ＮＨ４Ｃｌ－ＮＨ３．Ｈ２Ｏ）缓冲溶液，其络合物的最大吸收位于４５０ｎｍ，表观摩尔吸光系数为９．０５×１０＾３Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，Ｃｕ浓度在０－３０μｇ／Ｌ范围内服从比耳定律，铜与ＤＤＴＣ形成组成为１：２的稳定络合物。该方法用于铝合金中铜的测定，获得了满     

南中国海海藻刺状鱼栖苔的化学成分研究(I)

从采自南中国海红藻刺状鱼栖苔的乙醇提取物中分离出一个黄酮类化合物，经ＩＲ，ＵＶ，ＦＡＢＭＳ，１Ｈ－１ＨＣＯＳＹ，１３Ｃ－１ＨＣＯＳＹ，ＨＭＢＣ等现代波谱技术确定其结构为５，７－二羟基－２－对羟基苯基－３－Ｏ－（６－Ｏ－对羟基肉桂酰基－β－Ｄ－吡喃葡萄糖基）－４Ｈ－１－苯并吡喃－４－酮，并对碳信号进行了明确归属．这是首次从红藻中分离出黄酮类化合物．     

Degradation of azo dye Acid black 1 using low concentration iron of Fenton process facilitated by ultrasonic irradiation

A combination of ultrasonic and low concentration iron (<3 mgL(-1)) of Fenton process (US/Fenton) has been used to treat wastewater containing Acid black 1 (AB1). The results show that the oxidation power of low concentration iron of Fenton could be significantly enhanced by ultrasonic irradiation. The degradation of AB1 in aqueous solution by US/Fenton can receive better results compared with either Fenton oxidation or ultrasonic alone. Many operational parameters, such as ultrasonic power density, the pH value, the Fe(2+) dosage, the H(2)O(2) dosage, AB1 concentration and the temperature, affecting the degradation efficiency were investigated. Also, the effects of various inorganic anions (such as Cl(-), NO(3)(-), CO(3)(2-), etc.) on the oxidation efficiency of US/Fenton were studied. Under the given test conditions, 98.83% degradation efficiency was achieved after 30 min reaction by US/Fenton. The effect of various inorganic anions was in the following decreasing order: SO(3)(2-)>CH(3)COO(-)>Cl(-)>CO(3)(2-)>HCO(3)(-)>SO(4)(2-)>NO(3)(-). The results show that the US/Fenton can be an effective technology for the treatment of organic dyes in wastewater.     

表面增强拉曼光谱研究硫脲衍生物与ClO_4~-的共吸附行为

表面增强拉曼光谱研究硫脲衍生物与ＣｌＯ－４的共吸附行为顾仁敖１姚建林１袁亚仙１钟起玲２田中群３（１苏州大学化学系苏州２１５００６）（２江西师范化学系南昌３３００２７）（３厦门大学固体表面物理化学国家重点实验室，化学系厦门３６１００５）Ｓｕｒｆａｃｅ...     

多种阴离子对声致发光的影响

采用声源频率为1.1 MHz的超声波引发被空气自然饱和溶解的含有5种阴离子(Cl-,HCO-₃,NO-₃,SO2-₄,F-)的水溶液中的声致发光。发现只有F-离子在浓度为0～20 mg·L-1时会对声致发光产生猝息效应。文章对猝息机理进行了分析。     

Chemical stability of hydroxysulphate green rust synthetised in the presence of foreign anions: carbonate, phosphate and silicate

Hydroxysulphate green rust species were precipitated in the presence of various anions. is stable at ∼pH 7 and is transformed into a mixture of magnetite and ferrous hydroxide when the pH raised at ∼12. In the presence of carbonate species, is partially transformed into a mixture of magnetite and siderite at ∼pH 8.5. This transformation is stopped when silicate anions are present in the solution. As already observed for phosphate anions, the adsorption of silicate anions on the lateral faces of the crystals may explain this stabilization effect. Sulphate anions are easily exchanged by carbonate species at ∼pH 10.5. In contrast, anionic exchange between sulphate and phosphate anions was not observed.     

Study of the ion exchange equilibrium of Cl−, NO_3^{ - } , and SO_4^{{2 - }} ions on the AMX membrane

Equilibrium between the ion exchange membrane and solutions of anions at various valences has been the subject of this investigation. Competitive ion exchange reactions were studied on a strong base anion exchange membrane AMX manufactured by Tokuyama, commercialized by Eurodia, involving Cl^?, $ {\text NO}_3^{ - } $ and $ {\text SO}_4^{{2 - }} $ ions. Solution concentrations studied were 0.05 and 0.1 M for all the systems reported. Experiments were performed with sodium as the counter ion, and the temperature was kept constant (T?=?298 K). Ionic exchange isotherms for the binary systems— $ {{\text Cl}^{ - }}/{\text NO}_3^{ - } $ , $ {{\text Cl}^{ - }}/{\text SO}_4^{{2 - }} $ , and $ {\text NO}_3^{ - }/{\text SO}_4^{{2 - }} $ —were established. The obtained results show that the sulfate was the most strongly sorbed, and the selectivity order is $ {\text SO}_4^{{2 - }} > {\text NO}_3^{ - } > {{\text Cl}^{ - }} $ at 0.05 M and $ {\text NO}_3^{ - } > {\text SO}_4^{{2 - }} > {{\text Cl}^{ - }} $ at 0.1 M under the experimental conditions. Selectivity coefficients $ K_{{{{{\text Cl} }^{ - }}}}^{{{\text NO}_3^{ - }}} $ , $ K_{{2{{{\text Cl} }^{ - }}}}^{{{\text SO}_4^{{2 - }}}} $ , and $ K_{{2{\text NO}_3^{ - }}}^{{{\text SO}_4^{{2 - }}}} $ for the three binary systems were determined. All the results given by this membrane were compared with those obtained, in the same conditions, with the RPA membrane (produced by RHONE POULENC). Ternary equilibrium data were taken for $ {{\text Cl}^{ - }}/{\text NO}_3^{ - }/{\text SO}_4^{{2 - }} $ . The prediction of the ternary system based only on the binary data was consistent with the experimental data obtained for this system. The good agreement between the experimental and the predicted data showed that the proposed framework can be considered as an effective method to predict many ternary systems from binary systems.     

Selectivity of anion exchange membrane modified with polyethyleneimine

Previous works have been made on the improvement of selectivity of ion exchange membranes using adsorption of polyelectrolyte on the surface of the materials. The modification of the surface material in the case of an anion exchange membrane concerns the hydrophilic/hydrophobic balance properties and its relationship with the hydration state. Starting from this goal, the AMX membrane has been modified, in this work, by adsorption of polyethyleneimine on its surface. Many conditions of modification of the AMX membrane surface were studied. A factorial experimental design was used for determining the influent parameters on the AMX membrane modification. The results obtained have shown that the initial concentration of polyethyleneimine and the pH of solution were the main influent parameters on the adsorption of polyethyleneimine on the membrane surface. Competitive ion exchange reactions were studied for the modified and the unmodified membrane involving $ {\text{C}}{{\text{l}}^{ - }} $ , $ {\text{NO}}_3^{ - } $ and $ {\text{SO}}_4^{{2 - }} $ ions. All experiments were carried out at constant concentration of 0.3?mol?L^?1 and at 25?°C. Ion exchange isotherms for the binary systems $ \left( {{\text{C}}{{\text{l}}^{ - }}/{\text{NO}}_3^{ - }} \right) $ , $ \left( {{\text{C}}{{\text{l}}^{ - }}/{\text{SO}}_4^{{2 - }}} \right) $ and $ \left( {{\text{NO}}_3^{ - }/{\text{SO}}_4^{{2 - }}} \right) $ were studied. The obtained results show that chloride was the most sorbed and the selectivity order both for the modified membrane and the unmodified one is: $ {\text{Cl}} > {\text{NO}}_3^{ - } > {\text{SO}}_4^{{2 - }} $ , under the experimental conditions. Selectivity coefficients $ {\text{K}}_{{{\text{C}}{{\text{l}}^{ - }}}}^{{{\text{NO}}_3^{ - }}} $ , $ {\text{K}}_{{2{\text{C}}{{\text{l}}^{ - }}}}^{{{\text{SO}}_4^{{2 - }}}} $ and $ {\text{K}}_{{2{\text{NO}}_3^{ - }}}^{{{\text{SO}}_4^{{2 - }}}} $ for the three binary systems and for the two membranes were determined. It was also observed that for the modified membrane the selectivity towards sulfate ion decrease and the modified membrane became more selective towards monovalent anions.     

Perchlorate Reduction by Nanoscale Iron Particles

We report herein the near complete reduction of perchlorate (ClO ) to chloride by nanoscale iron particles. The nanoparticles also reduce chlorate (ClO ), chlorite (ClO ) and hypochlorite (ClO ) to chloride. No reaction was observed with microscale iron powder under identical conditions. The temperature sensitivity of the perchlorate-nanoparticle reaction is evidenced by progressively increasing rate constant values of 0.013, 0.10, 0.64 and 1.52 mg perchlorate per g nanoparticles per hour (mg-g^-1-hr^-1), respectively, at temperatures of 25, 40, 60 and 75°C. The activation energy of perchlorate-iron reaction was calculated to be 79.02 ± 7.75 kJ/mole. Despite favorable thermodynamics, the relatively large activation energy for this reaction suggests that perchlorate reduction is limited by the slow kinetics. The nanoscale iron particles may represent a potential treatment method for perchlorate-contaminated water.     

壳聚糖与不同金属锌盐配位的红外光谱研究

用壳聚糖和硫酸锌合成了一系列不同配比的配合物。通过对这些配合物红外光谱的分析和比较,考察了主要吸收峰随不同配比的变化规律,照发了它们的主要红外吸收峰,研究还表明,不同锌盐与壳聚糖形成的配合物有不同的配位环境。     

Effects of acid anions,major metallic elements,and chlorides on Li detection by DFWM in graphite furnace

In trace Li analysis with degenerate four-wave mixing （DFWM） method, acid anions and major metallic elements are dominant interferences in Li-eontaining samples. To better use DFWM technique to analyze trace Li in actual samples, we study their effects on Li DFWM signal intensity. It is found that K, Cs, and Ni can enhance the Li DFWM signal, SO4^2, PO^34-, Cl-, and Ca can cause significant suppression, and NO3-, Mg, Ba, Sr, and Na almost have no effects. Finally, we use HaBOa to eliminate the depressive effects of chlorides on Li DFWM signal. The result is also of reference in other trace elements analysis with DFWM.     

水体中溶解氧对声致发光的影响

采用声源频率为1.1 MHz的超声波, 在温度为283～313 K的范围内引发水中的声致发光, 发现声致发光强度的对数lnI和水中的溶解(DO)的浓度之间呈线性关系。同时模拟了水中含有5种阴离子: Cl-, SO-₄, F-, NO-₃, HCO-₃时阴离子的存在对声致发光的影响, 发现上述5种阴离子对声致发光强度没有影响。