复数折射率介质中光束传输的Schro..dinger形式理论研究

将复数折射率介质的Helmholtz方程化为具有复数势能的Schredinger方程的形式,用进化算子的逆算子代替相应的共轭算子,定义了与实数折射率系统光束传输参数具有相似性质的力学量的复数平均值,证明复数光束质量因子守恒是复数ABCD定律成立的充要条件.利用推广的Heisenberg图象,从复数光束传输参数的进化方程得到了位置算子和动量算子的线性进化方程,进一步利用量子力学的表象和表示理论得到了一般复数ABCD系统的Huygens积分. 关键词： 复数折射率 Schrdinger方程 Heisenberg图象 ABCD定律     

一种具有双光子活性的新型吡啶盐的合成、表征及性质

一种具有双光子活性的新型吡啶盐的合成、表征及性质;D-π-A吡啶盐; 三阶非线性光学特性; 单晶X射线衍射; Z扫描     

Synthesis and Structure of Di［bis（diphenylphosphino）ethane］ Copper（Ⅱ） Dinitrate

ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒｅｏｆＤｉ［ｂｉｓ（ｄｉｐｈｅｎｙｌｐｈｏｓｐｈｉｎｏ）ｅｔｈａｎｅ］Ｃｏｐｐｅｒ（Ⅱ）ＤｉｎｉｔｒａｔｅＬＩＮＫｕｎ－Ｈｕａ；ＹＡＮＧＲｕｉ－Ｎａ；ＣＡＩＤｏｎｇ－Ｍｅｉ；ＪＩＮＤｏｕ－Ｍａｎ（ＨｅｎａｎＩｎ...     

两种新型吡啶盐的合成，表征及双光子性质研究

本文报道了两种新的吡啶盐的合成，用元素分析、红外光谱、单晶X-射线衍射进行了表征。研究了它们的紫外光谱、荧光光谱和光限幅特性，发现它们的DMF溶液对1 064 nm皮秒脉冲激光表现出明显的光限幅特性。     

Synthesis and Crystal Structure of [Cu (C_8H_4O_2F_3S) (2, 2' -bipy) ]

1INTRODUCTIONCoppercomplexesarewidelyusedascatalystsinthedecompositionofdisubsti-tutedperoxides"'-Theelectronicstructureandbondingatthecatalystscanbeprof-itablypursuedbystudyingmodelcomplexes.Generally,theCu(I)complexesareob-tainedbyreactionofCu(l)saltswithligands.Wereporthereamethodofpreparingcopper(I)complexbythereactionofCupowderwith2-thenoyltrifluoroacetone,2,2'-bipyinmethanol.2EXPERIMENTALReactionwascarriedoutundernitrogenatmosphere.2,2-bipy(1mmol)wasaddedtoamixtureof2-thenoyl…     

Zn/V2O5水相二次电池的交流阻抗研究

The dependence of charge transfer resistances of electrodes in the aqueous Zn/V 2O 5 secondary battery on the Zn 2+ amount intercalated was studied by means of AC impedance experiments. The results showed that the electrode reaction on cathode was controlled by the diffusion of Zn 2+ at the beginning of the discharge process. With the increase of Zn 2+ amount intercalated into the cathode, the reaction became a kinetic controlled process, i.e.a process controlled by intercalation of Zn 2+ in V 2O 5.     

Syntheses,crystal structures and electrochemistry of divalent metal 4-methylbenzenesulfonate complexes with o-phenanthroline

Three new compounds, namely [Mn(phen)₂(L)₂] · EtOH (1), [Zn(phen)₂(H₂O)₂]2L · 6H₂O (2) and [Cd(phen)₂(H₂O)₂]2L · 6H₂O (3), where HL = 4-methylbenzenesulfonic acid and phen = o-phenanthroline, have been synthesized, and their crystal structures determined by X-ray diffraction. In the complexes the metal atoms have two different coordination environments. Complex (1) consists of neutral molecules, [Mn(phen)₂(L)₂], in which Mn^II is six-coordinated by four nitrogen atoms from two o-phenanthroline molecules and two oxygen atoms from two sulfonate ions. Complexes (2) and (3) are isomorphous, each consisting of cationic species [M(phen)₂(H₂O)₂]²⁺ [M = Zn (2), Cd (3)], in which M^II is six-coordinated by four nitrogen atoms from two o-phenanthroline molecules and two water molecules. The electrochemical behavior and FT-IR of these compounds were also studied in detail.     

Amperometric determination of ascorbic acid at a novel ‘self-doped’ polyaniline modified microelectrode

A ‘self-doped’ polyaniline modified microelectrode, prepared by cyclic potential sweep on a microdisk gold electrode from –0.2 to 0.85 V in 0.5 mol/L sulfuric acid containing aniline and o-aminobenzoic acid, has been developed. The copolymerized process and the resulting polymer characteristics were investigated in detail. This composite film indicated a good electrochemical activity in a wide pH range even in basic solution. Meanwhile, the redox couple exhibited an excellent electrocatalytic activity for the oxidation of ascorbic acid. The oxidation overpotential of ascorbic acid was decreased over 200 mV at this modified electrode compared with a bare gold one. Moreover, the effects of film thickness and pH on the catalytic efficiency were further studied. The dependence of catalytic currents on the concentration of ascorbic acid was linear in the range of 1.2 × 10^–5∼ 2.4 × 10^–3 mol/L with a correlation coefficient of 0.996. Also, the determination of ascorbic acid in actual samples was evaluated and the results are satisfactory. Received: 7 October 1997 / Revised: 3 February 1998 / Accepted: 7 February 1998     

Synthesis of titania and titanate nanomaterials and their application in environmental analytical chemistry

TiO₂ nanoparticles and H₂Ti₂O₅·H₂O, Na₂Ti₂O₄(OH)₂ nanotubes were synthesized by solvothermal method and their applications in the degradation of active Brilliant-blue (KN-R) solution were investigated. The experimental results revealed that the synthesized TiO₂ nanoparticles had a good crystallinity and a narrow size distribution (about 4–5 nm); the obtained H₂Ti₂O₅·H₂O, Na₂Ti₂O₄(OH)₂ were tubelike products with an average diameter of 20–30 and 200–300 nm length. The three catalysts we synthesized had some hydroxyl groups and the maximum absorption boundaries of the samples were all red-shifted, which indicated the samples had a promising prospect in photocatalysis.

The results of the photocatalytic experiments indicated that the photocatalytic activity of the samples was: TiO₂ > H₂Ti₂O₅·H₂O > Na₂Ti₂O₄(OH)₂, which was in good accordance with the fact of FTIR and UV–vis absorption spectra. The formation mechanism of these nanostructures was also discussed.     

532 nm纳秒激光电离产生Xez＋(z ≤ 11)高价离子

利用25 ns脉冲Nd-YAG 532 nm激光,在1011 W•cm－2的光场强度下,研究了Xe原子团簇的激光电离过程,观察到较强的高价离子信号,其中最高价态达＋11.不同脉冲束位置和束源压力的实验表明,仅当激光作用于脉冲束中段时才能观察到高价离子,且高价离子信号强度随束源压力的增加而迅速增强,说明束中大尺寸团簇的存在与高价离子的形成密切相关.通过实验,认为高价离子可能来源于电离原子团簇而形成的纳米尺度等离子体小球对激光光场的共振吸收.