Synthesis,characterization, and structure of lanthanide picrate complexes with tetramethylenesulfoxide (TMSO)

A series of complexes with composition M(pic)₃(TMSO)₃ (M=La, Nd, Sm, Eu, Gd, Er, Yb, and Y) were synthesized and characterized. The electronic absorption spectrum of the Nd complex and the emission spectrum of the Eu complex were recorded and assigned. The unique compound, Sm(pic)₃(TMSO)_2.5(EtOH)_0.5, obtained by recrystallizatiori of Sm(pic)₃(TMSO)₃ from ethanol, was characterized by single-crystal X-ray analysis. The complex crystallizes in a monoclinic cell space groupP2₁/n witha=21.809(4)Å,b=15.811(3)Å,c=12.800(3)Å and =99.87(4)°. The coordination polyhedron about the Sm center is a tricapped trigonal prism involving the three picrates, which act as bidentate ligands via the phenoxo oxygen and an oxygen of an adjacent nitro group, as well as the oxygens of two TMSO ligands. The ninth position is statistically (50%) occupied by an oxygen atom of a third TMSO ligand and an oxygen atom of an ethanol molecule.     

空气隙型偏光棱镜干涉现象的研究

对空气隙型偏光镜中存在的干涉现象进行了实验研究和理论分析，得出了干涉条纹宽度、干涉深度与棱镜结构参数及入射角之间的定量关系，在此基础上提出了消除干涉影响的具体方案，取得了满意的结果。     

波导薄膜折射率测量方法研究

本文讨论了四种测量波导薄膜的有效方法,对各种测量方法作了分析研究,并着重对棱镜耦合法进行了实验研究。     

光计算中一种等效全混洗交换光互连网络的实现方法

提出了一种等称全混洗交换（ｐｅｒｆｅｃｔｓｈｕｆｆｌｅ／ｅｘｃｈａｎｇｅ）光互连网络的光学实现方法。该方法采用液晶空间光调制器作为光交换控制器件，用Ａｒ＋离子激光器提供光源，光互连系统由偏振分光棱镜、光束分束器和液晶空间光调制器组成。在实验上成功实现了８×８全混洗交换网络的光互连。     

算术图的构造方法

本文给出了由简易算术图构造复杂算术图的一些方法，发现了许多典型图类的算术标号。     

冰洲石红外偏光棱镜设计及性能测量

国际上普遍采用的冰洲石偏光棱镜工作波长为2.4—2.9μ。根据对冰洲石红外偏光光谱及色散特性的研究,对格兰·汤普逊和格兰·泰勒型两种棱镜的参数进行特别设计后,将使用波段拓宽到5.1μ,本文给出两种红外偏光棱镜的设计参数及测试方法,并将测试结果与线栅式和布儒斯特角式红外偏光镜的参数进行了比较。     

组合三棱柱振子流致振动运动特性分析

本文以流致振动能量转换系统为基础,以截面形式和刚度为变量针对组合三棱柱振子进行试验,评估振幅、频率等指标。试验选取了组合三棱柱振子进行了模型试验,通过改变截面排布形式以及系统刚度来研究截面布局、刚度对组合三棱柱振子的影响。该研究旨在探究组合振子流致振动的最佳振动条件,为后续多振子流致振动研究扩展思路。试验结果表明:三种不同排布形式的组合振子,在不同刚度工况下都有较好的振动效果,Ⅰ型和Ⅲ型振子振动随流速变化表现为典型的涡激振动。Ⅰ型排布振子具有最好的振动表现,系统最大振幅比为A*=0.85(K=1400N/m,Ur=7.5)。     

Comparison of Si_n~+ and Ge_n~+(n=2―15) Cationic Structures

We designed and optimized a large number of the isomers of Si12+ at the level of density functional theory (DFT)-B3LYP/6-311++G(d) using the Gaussian 03 software package. An unambiguous structure of the Si12+ cluster is presented, whose IR spectrum agrees well with the experiment result. The most stable geometric structures of Gen+(n=2―15) clusters were determined by the all-electron PBE/DND method in DMol3 of the Material Studio Package, and compared with those of the corresponding Sin+ geometries. Most st...     

Analysis of the random disturbance in transmission intensity for Lippich prisms

We have theoretically studied the transmission intensity disturbance in the spinning Lippich prism polarizer. Experimental results indicate that the variation of the transmission intensity with the rotation angle deviates from Malus’ cosine-squared law and exhibits stochastic fluctuations. We first consider the effect of the discontinuous rotation of the polarizer. Then we study the effect of the stochastic vibration of the polarizer in the direction perpendicular to the rotation direction based on the multi-beams interference theory. The numerical result confirms that the latter contributes majorly to the disturbance. Further studies show that the magnitude of the disturbace depends sensitively on the cement material of the polarizer, and it can be reduced to rather low levels when appropriate material is selected.     

在双棱镜干涉实验中检验两虚光源间距离的新方法

本文采用作图法研究在双棱镜干涉测钠光波长的实验，总结出以直接测得量检验两虚光源之间距离的新方法。