稀土半乳糖醇络合物的拉曼光谱研究

糖与金属离子之间的相互作用有一定的生物功能 ,因而对其研究具有重要意义。应用拉曼光谱研究了一系列稀土离子半乳糖醇络合物 ,结果表明 ,在形成络合物以后 ,拉曼光谱发生明显变化。不同稀土离子的拉曼光谱虽然某些峰位比较接近 ,但相对强度及峰形方面都表现出了较大的差别 ,可以清楚地看到不同稀土离子的影响 ,反映了每种稀土离子的特性。     

Synthesis and Photoluminescence of a New Red PhosphorescentIridium(III) Quinoxaline Complex

Much attention has been paid to the phosphorescent materials in recent years for their potential application as highly efficient electroluminescent (EL) emitters in organic light emitting diodes (OLEDs) 1-2. Heavy metal complexes, particularly those containing Pt and Ir, where strong spin orbit coupling leads to singlet-triplet state mixing, can result in high efficiency electrophosphorescence in OLED 3-5. Among the many kinds of metal complexes, iridium complexes are the most effective …     

Interaction between nitric oxide and lipid-like DDPA LB film investigated with SHG and AFM

Interactions between Nitric oxide (NO) and DDPA Langmuir-Blodgett (LB) film are investigated with second harmonic generation (SHG) and atomic force microscopy (AFM). It has been found that the adsorption of NO molecules on DDPA LB film only changes the value of the second-order susceptibility of the DDPA molecule on film but not its orientation.     

基于随机矩阵的差分代换算法的完备化

本文利用有限核原理,给出了基于随机矩阵的逐次差分代换方法的一个完备化.获得了判定多项式半正定性的完全算法.此算法可进一步应用于计算有理函数的全局最优值.与常用的数值最优化方法不同的是,本方法获得的是精确符号解.     

相移全息术在粒子速度测量中的应用

本文提出了相移全息术测量粒子速度的新方法,并从理论上进行了分析。由于两次曝光之间,给物光中引入了相移π,因而,再现象中背景与噪声被减去,获得了高信噪比的再现象。简短地讨论了引入相移的方法。最后,通过模拟实验比较了本方法与同轴和离轴全息法的结果。指出了这种技术的应用前景。     

The synthesis and crystal structure of heteronuclear complex of lanthanide with sulfo-salicylic acid [Na3YLa2(C7H3SO6)4.26H2O]n

The titled complex has been synthesized by the reaction of sodium sulfo-salicylate with lanthanum and yttrium perchlorate. The crystal structure has been determined by single crystal X-ray diffractometry. The crystal is monoclinic with space group C2/c. The unit cell parameters are as follows: a=16.289(8), b=18.323(8), c=22.044(8) A, β=106.34(2)°, V=6314(6) A3, Z=4 and Dc=1.764 g/cm3. The structure was solved by direct method. The least-square refinement based on 3776 observed reflections [F > 6σ(F)] converged to a final R=8.6% and F(000) is 3548. Yttrium ion with eight-coordinate is located in central of the molecule, the two lanthanum ions with ten-coordinate are located at the two sides of yttrium ion. There are two positions for Na in the molecule, one is in the C2 axis with six coordinate, the other one is in a general position with five-coordinate.     

DEM simulation of polydisperse systems of particles in a fluidized bed

Numerical simulations based on three-dimensional discrete element model (DEM) are conducted for mono-disperse, binary and ternary systems of particles in a fluidized bed. Fluid drag force acting on each particle depending on its size and relative velocity is assigned. The drag coefficient corresponding to Ergun’s correlation is applied to the system of fluidized bed with particle size ratios of 1:1 for the mono-disperse system, 1:1.2, 1:1.4 and 1:2 for the binary system and 1:1.33:2 for the ternary system b...     

HEAT FLOW FOR YANG-MILLS-HIGGS FIELDS, PART I HEAT FLOW FOR YANG-MILLS-HIGGS FIELDS, PART I

1. IntroductionLet (M, g) be a four dimensional Riemannian manifold and let P be a principal bundlewith compact Lie structure group G over M. The Yang-Mills functional is defined bywhere F denotes the curvature of a connection D and dM is the volume form induced bythe metric g on M. All integrals on M in this paper will be with the volume form dM, sowe will not write it explicitly.Donaldsonl3] and K. Uhlenbeck[18'19] obtained many important results about Yang-Millsequations (see also […     

2-氨基-4-磺酸基-丁酸及其金属离子络合物的光谱研究

本处次对２－氨基－４－磺酸基－丁酸的红外光谱作了初步指认,并早此对其存在形式作出判断、同时,合成了２－氨基－４－磺酸基－丁酸与Ｎａ＾＋、Ｋ＾＋、Ｃａ＾２＋形成的络合物,对其红外光谱及拉曼光谱进行了分析讨论,并对其配位方式进行了比较。结果表明形成络合物后,羟基、磺酸基均参与配位,且破坏了原有分子间的氢键网络,进行了分子间的重新组合。