Electronic stopping powers of Ni, Gd and Pd metals for 19F ions at low energy

Summary Electronic stopping power of ¹⁹F in Ni, Pd and Gd was measured and compared to Mstar and SRIM calculation as well as experimental results published in literature. It turns out that the present electronic stopping power agrees reasonably well with them.     

奋乃静和氟奋乃静的毛细管电泳柱端喷壁式安培检测

应用自组装毛细管电泳．安培检测装置，建立了同时分离检测抗精神病药奋乃静与氟奋乃静的新方法。在1050mV(vs．Ag／AgCl)检测电位下，奋乃静与氟奋乃静的检出限分别达0．060mg／L与0．075mg／L。在最佳检测条件下，两组分的响应电流与浓度之间有着良好的线性关系，线性范围为0．75～75mg／L。将方法用于药物片剂以及模拟尿样和血清样品中奋乃静和氟奋乃静的测定，结果令人满意。     

Cu，Pd－ZSM－5上NO分解和CO氧化的催化作用

双交换Ｃｕ，ｐｄ－ＺＳＭ－５催化剂（Ｃｕ交换度为１０５％，Ｐｄ交换度分别为３．４％和３３％）对ＣＯ氧化反应有活性增强作用，对ＮＯ分解反应不存在增强效应．双交换催化剂在于交换程序不同，而表面物种不同，活性组分的分布状态不同，因而有不同的活性．先交换Ｃｕ，４００℃焙烧后再交换ｐｄ的Ｃｕ－Ｐｄ－ＺＳＭ－５催化剂，对上述两类反应的活性存双组分催化剂中均为最高．Ｈ_２－ＴＰＲ谱表明，共交换的Ｃｕ－Ｐｄ－ＺＳＭ－５中尚有部分ＣｕＣｌ＋占据了部分交换位置，而使ＣＯ氧化活性稍有下降．Ｎ_２－ＤＴＡ和Ｈ_２－ＴＰＲ谱结果表明，Ｐｄ交换到Ｃｕ－ＺＳＭ－５中后，抑制了吸附水和水合铜化合物的形成，由此提高了在２００—３００℃时氧的吸附量．后者的大小和ＣＯ氧化活性有顺变关系．Ｎ_２－ＤＴＡ谱中３４０—４４５℃的放热峰可能分别表征了和ＮＯ分解活性有关的铜氧桥或把氧桥的形成，该放热峰的峰温愈低，峰面积愈大，则ＮＯ分解活性愈高．     

脱蜡剂DF-1的气相色谱-傅里叶变换红外光谱联用分析

脱蜡剂ＤＦ－１是一种含多种有机成分的碳氢化合物，经气相色谱－红外光谱联用分析后，确定了这些组分的组成与含量。     

多晶顺磁共振谱的拟合

对电子自旋1/2≤S<3.5,核自旋1/2≤I<4.5和配体少于10个的顺磁体系的多晶EPR谱的拟合进行研究。在VAX-11/785计算机上用FORTRAN语言建立EPR谱模拟程序包,计算了多个例子,获得较为满意的结果。     

光谱复杂的稀土基体中稀土杂质ICP光谱测定的一些问题

ICP激发光源以其独特的功能使ICP/AES技术在稀土分析中的应用日益广泛,在一定程度上取代了经典的直流电弧光谱法,但应指出,由于常规雾化器的低雾化效率(≤5％)和试样的高倍稀释,ICP/AES技术的实际检测能力的改善并不明显,本文用ICP光谱法测定了     

The synthesis and reactins of ortho bromophenyllithium

Experimental conditions have now been developed whereby o-bromophenyllithium(II) may be prepared in excellent yields and used as an organometallic intermediate for the synthesis of a variety of ortho bromo substituted phenyl compounds (o-BrC₆H₄X). THe thermal stability, decomposition products and reactions of II wre studied. REactions between II and a variety of substrates, e.g., CO₂, dimethylformamide, fluorinated esters, hexafluorobenzene, and organosilicon chlorides were examined.     

脉冲激光光声量热装置的研制及用之对香豆素激光染料无辐射跃迁过程的研究

本文报道了一套适用于液相体系的高灵敏度脉冲激光光声量热装置的建立。用此仪器对香豆素激光染料C428, C47和C120的无辐射过程进行了研究, 测得它们在无水乙醇中的无辐射跃迁量子产额分别为0.50, 0.47和0.38。     

新型大环醚的合成——1,7-N,N′双取代-1,7-二氮-4,10,13-三氧环十五烷的合成

我们曾报道1,10-N,N’-双取代-1,10-二氮-4,7,13,16-四氧环十八烷(1)及1,7-N,N’-双取代-1,7-二氮-4,10-二氧环十二烷(2)二类大环聚醚的合成及其对碱金属离子的络合性能。     

Diastereoselective Three Component Reaction of N‐Glyoxyloyl Camphorpyrazolidinone,Amine and Allyltributylstannane: Facile Synthesis of Homoallylic Amines

Diastereoselective allylation of imine derived from N‐glyoxyloyl camphorpyrazolidinone and amines was treated with allyltributylstannane in the presence of triflic acid. The corresponding optically enriched homoallylic amines were obtained in reasonable to high material yields and with practical levels of stereoselectivity in 10 min at ambient temperature.