STUDIES ON cis-trans-ISOMERIZATION AND REACTION KINETICS OF A μ, η~2-VINYL LIGAND IN A TRIOSMIUM CLUSTER

The dihydride cluster H_2O_(s_3)(CO)_(10) reacts with ethyne to give a cis-adduct [O_(s_3)H(μ,η~2-CH=CH_2)(CO)_(10)]. The high deuterated cluster D_2O_(s_3)(CO)_(10), the reaction of D_2O_(s_3)(CO)_(10)with ethyne C_2H_2 to form the vinyl product cluster [O_(s_3)D(μ, η~2-CH=CHD)(CO)_(10)], and thereaction of H_2O_(s_3)(CO)_(10) with the deuterated ethyne C_2D_2 to form [O_(s_3)H(μ,η~2-CD=CDH)(CO)_(10)] have been reported primarily in this paper. The two cis-adducts undergo cis-trans-isomerization of μ,η~2-vinyl ligands under a small amount of the nucleophile pyridine. Usingthe combination of deuteration and dynamic ~1H,~2H NMR spectra, we report the experimen-tal evidence determined by the dynamic ~1H, ~2H NMR spectra, mechanism, and kinetic dataof the isomerization.     

羧甲基壳聚糖/聚乙烯醇/甘油环氧树脂蛇笼型复合螯合膜的制备及对金属离子的吸附性能

以交联甘油环氧树脂交联的聚乙烯醇(PVA)为笼树脂，羧甲基壳聚糖(CCTS)为蛇树脂制备了具有蛇笼结构的复合螯合膜，研究了其对Cu^2 、Ni^2 、Pb^2 、Fe^3 、Zn^2 ，Hg”^2 、Cd^2 等金属离子的吸附性能，研究表明，该树脂对Cu^2 、Ni^2 、Pb^2 有较好的吸附性能，其中PVA是对Cu^2 的吸附的主要贡献者，而CCTS则是在对Ni^2 的吸附中起主要作用。该树脂可以用于含Cu^2 废水的处理。     

Synthesis of a Mimicking Hybrid of Annonaceous Acetogenin with Steroid for Antitumoral Activity Investigation

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β-榄香烯振动光谱的量子化学从头计算

利用G98及GAMESS从头计算程序的RHF／6－31方法,对β－榄香烯的全部振动基频作了计算,并与实测红外光谱做了对比,归属了它们的振动模式,讨论了它们的特征基频,并对理论计算的振动频率进行了标度校正。     

Coral reef-like polyanaline nanotubes prepared by a reactive template of manganese oxide for supercapacitor electrode

Coral reef-like PANI nanotubes composed of nanopaticles were successfully synthesized by a reactive template of manganese oxide.The structure was characterized by using SEM,TEM,and FT-IR,and the supercapacitive behaviors of these nanotubes were investigated with cyclic voltammetry（CV）,and charge-discharge tests,respectively.A maximum specific capacitance of 533 F/g could be achieved in 1mol/L aqueous H₂SO₄ with the potential range of -0.2 to 0.8 V（vs.the saturated calomel electrode） in a half-cell setup configuration for PANI electrode,suggesting its potential application in the electrode material for electrochemical capacitors.     

COMPLETENESS FOR H_q~p(D) SPACE

Abstract Let D be arbitrary simply connected domain with at least two boundary points.We have introduced a kind of analytic functions' space H_■~V (D) (p≥1, q>0)and shown that it is a complete linear space with respect to the norm ■·||_(H_q~p(D)).     

加速天体的某些热力学性质

本文根据含有较多磁单极的一类加速天体的引力场度?,研究加速天体的某些?力学性质,我们得出结论:(1)具有加速运动的天体,即使不?的转动,也会造成两极与?道间的温差。(2)两个极区温度不同,θ=0的极区温度高于θ?π的极区温度。磁菏q的作用能使天体表面温度降低,使引力半径减小,     

Hulthen势与谱生成代数

本文将Hulthen势场中的S波径向方程作适当的变量变换、使其可用so(2.1)李代数求解;进而通过倾斜变换引入附加参数ω以改善解的收敛性,并给出了迭代求解的全部计算公式。     

戊酰异羟肟酸、庚酰异羟肟酸与Cu(Ⅱ)、Ni(Ⅱ)、Mn(Ⅱ)、Zn(Ⅱ)络合稳定常数的测定

本文报导了戊酰异羟肟酸和庚酰异羟肟酸与Cu(Ⅱ)、Ni(Ⅱ)、Mn(Ⅱ)、Zn(Ⅱ)络合的稳定常数,结果表明,金属离子形成络合物的强弱次序为Cu>Ni>Zn>Mn这一结果与梅勒(Mellor)等所得的顺序相符几。对同一种金属离子的络合能力则是戍酰异羟肟酸大于庚酰异羟肟酸。     

钒的一个特别灵敏指示反应

本文研究了钒（V）在乙酸介质中催化溴酸钾氧化钙试剂羧酸钠盐的褪色反应。本方法的灵敏度为2.5×101?g/ml,与同类方法相比为最高,测定范围为0～4ngV/25ml。本法已用于水样中超痕量钒测定。