Copper Promoted Au/ZnO-CuO Catalysts for Low Temperature Water-gas Shift Reaction

IntroductionThe water-gas shift(WGS)reaction is an impor-tant step in many important chemical processes[1].Re-cently,the renewed interest in the removal of CO bythe WGS reaction has grown significantly because of theincreasing attention to pure hydrogen p…     

三元合金Cu76Ni15Sn9的离子溅射研究

在２７ｋｅＶ Ａｒ⁺离子轰击时,用收集膜技术结合俄歇谱仪（ＡＥＳ）,研究了三元合金Cu₇₆Ni₁₅Sn₉系统的择优溅射行为。同时使用扫描电子显微镜（ＳＥＭ）与电子探针微分析（ＥＰＭＡ）．观察了靶点表面形貌变化并测定了形貌特征微区的合金组份原子的相对百分浓度。结果表明,Ｃｕ原子较Ｎｉ原子、Ｎｉ原子较Ｓｎ原子,在所测定范围（０─６０°）内择优发射。最后讨论了靶点表面形貌特征和“元素局域富集”现象对择优溅射过程的影响。 关键词：     

MULTIPHOTON EXCITATION OF A WATER MOLECULE IN INTENSE LASER FIELDS

A stretch vibration Hamiltonian of H_2O has been derived by using the second quantization, unitary transformations and the optimization of coefficients. The energy spectrum obtained from this Hamiltonian is in good agreement with that of experiments. The multiphoton excitation and the energy absorption of H_2O in intense laser fields have been calculated.     

稀土高分子发光材料研究的新进展

介绍了稀土高分子发光材料的发光机理及其发展历程，对其合成方法以及研究方向进行了综述，着重阐述了掺杂型和键合型稀土高分子发光材料研究的最新进展，并对其发展方向和应用前景作了展望。     

THE COMPARISON OF LANZHOU LOESS PROFILE WITH VOSTOK ICE CORE IN ANTARCTICA OVER THE LAST GLACIATION CYCLE

Loess near Lanzhou in the late Pleistocene is very sensitive to climatic fluctuations. The Beiyuan terrace profile in Linxia City, of which the curve of susceptibility tallies with the trend of isotopic curves of Vostok 2083 m ice core in Antarctica, is 35m thick. There are five layers of paleosols under Malan loess(L_1). Upper three layers (S_(1-a),S(1-b)and S_(1-c) correspond to three warm stages in last interglaciation, Interstadial of Last Glacial (C stage in Antarctic ice core)was clearly recorded in the Beiyuan profile, in which three layers of paleosols and two of loess were formed. The lowest section of the profile belongs to penultimate glaciation, in which fossils of cold-drought-resistant mammal and mollusc have been discovered.     

二胺扩链剂对RIM聚氨酯－脲弹性体的结构与性能的影响

采用实验室小型ＲＩＭ机制备了一组不同芳香二胺扩链的嵌段聚氨酯－脲（ＰＵＵ）弹性体，借助于ＩＲ、ＤＳＣ、ＤＭＴＡ、ＳＥＭ以及拉伸试验等测试手段对其结构与性能进行了研究．通过比较由ＭＤＡ、ＤＥＴＤＡ以及ＣＡＭＤＡ三种不同活性和结构的芳香二胺扩链剂与二异氰酸酯反应形成的硬链段对ＲＩＭＰＵＵ弹性体的结构与性能的影响，表明：ＭＤＡ基ＲＩＭＰＵＵ中软、硬链段微区界面作用指数很小，微相分离程度却很大，其性能最差；ＤＥＴＤＡ基ＲＩＭＰＵＵ弹性体有理想的界面作用指数，以及适当的微相分离程度，其性能位于三者之中最佳．ＤＭＴＡ研究证实在一定的温度范围内ＤＥＴＤＡ基ＲＩＭＰＵＵ的模量稳定性最好．     

CRYSTAL AND MOLECULAR STRUCTURE OF THE COMPLEX OF METHOXYCARBONYLETHYLTIN TRICHLORIDE WITH SALICYLIDENE－M－TOLUIDINE

ＣＲＹＳＴＡＬＡＮＤＭＯＬＥＣＵＬＡＲＳＴＲＵＣＴＵＲＥＯＦＴＨＥＣＯＭＰＬＥＸＯＦＭＥＴＨＯＸＹＣＡＲＢＯＮＹＬＥＴＨＹＬＴＩＮＴＲＩＣＨＬＯＲＩＤＥＷＩＴＨＳＡＬＩＣＹＬＩＤＥＮＥ－Ｍ－ＴＯＬＵＩＤＩＮＥＦａｎｇＸｉｎＦＵ；ＸｉｕＪｕａｎＬＩ；Ｈ...     

New Type High Efficient Quasi-Solid-State Ionic Liquid Electrolyte for Dye-Sensitized Solar Cells

For the fist time the preparation of a mostly solid-state high efficiem electro-conductive material comprising 1-methyl-3-propylimidazolium iodide （MPII）, benzimidazole （BI）, iodine and lithium iodide was reported. In this electrolyte, BI acts as not only additives but also gelators. With its significant electrochemical properties, an overall efficiency of 3.07% was achieved under AM 1.5 （100 mW/cm^2）.     

一种西佛碱侧链型液晶高分子的合成及表征

一种西佛碱侧链型液晶高分子的合成及表征邹友思，林国良，姚青青，戴李宗，潘容华（厦门大学化学系厦门３６１００５）关键词联苯，西佛碱，侧链型，液晶高分子，基团转移聚合Ｆｉｎｋｅｌｌｎａｎｎ等提出的柔性基去偶合概念’］已在侧链型液晶高分子的研究中得到了证实...     

高效液相色谱和热重分析在树形聚酰胺胺合成中的应用

优化了聚酰胺胺树形分子合成工艺条件，采用HPLC和热重分析（TG）相结合的方法对所合成的树形聚酰胺胺进行分析与表征；HPLC的分析表明，在各不同代的目标化合物中，均有反应物单体存在，在高代产物中除了含有少量反应物外，还有少量的低代数分子；TG分析表明，产物中小分子反应物占的比例很少，一般为2％－3％左右，如果将减压蒸馏后的产物重新进行真空干燥，对半代树形大分子，能进一步有效除去小分子反应物，而对于整数代树形大分子，则效果并不理想。