Chiral Separation of Esmolol and Terazosin by Cyclodextrinmodified Capillary Zone Electrophoresis

IntroductionTheincreasingnecessity0fpharmacologicalresearchforchiraldrugshasrenderedchiralseparationanactiveareaincaPillaryelectroph0resis(CE)today.Variousmodes0fCE,includingcaPillaryzoneelectroph0resis(CZE),micellarelectrokineticchromatography(MEKC),caPillarygelelectrophoresis(CGE)andcapillaryisotachophoresis(CITP),havebeenappliedforthispurp0se',amongwhichCZEisthemostpopularoneforitshighefficiency,lowexpenseandeaseofoperation.Forsuccessfulchiralseparati0ninCZE,theselectortypeisofcr…     

N－（1－氧代－1－磷杂－2，6，7－三氧杂双环［2．2．2］－辛烷－4－羰基）－N＇－芳（烷）基硫脲的合成及结构研究

首次合成了酰基异硫氰酸酯４，并将其与各种芳胺、脂肪胺和肼衍生物加成，得到了２２种未见文献报道的含双环笼状磷酸酯结构的酰基硫脲化合物（５ａ－５ｘ）。４与丁胺反应未得到预期的加成产物，而得到相应的取代产物６。研究了５的结构。     

四价铈卟啉配合物的合成和性质研究

由于镧系卟啉配合物具有优于d过渡金属卟啉配合物的特殊光学和磁学性能,因而越来越引起人们的浓厚兴趣。但是,十多年来,这方面的研究工作主要集中在三价稀土卟啉配合物上,还未见到四价稀土卟啉配合物的报道。我们合成了铈(Ⅳ)的卟啉配合物,并研究了它们的光谱性质。     

Moduli of simple rank-2 sheaves onK3-surfaces

We study the birational structures of the moduli spaces of simple rank-2 sheaves over aK3-surfaceX. We show that these birational structures are closely related to the Hilbert schemes ofX. Our results provide a complete answer to a problem (rank-2 case) of A.N. Tyurin whenX is an ellipticK3-surface.     

不同选通条件下对光谱烧孔孔深的研究

本文从理论上分析了低激发密度下,选通光分别为脉冲光和连续光时,孔深随时间的变化,得到可以通过脉冲光烧孔、连续光选通的方法缩短烧孔时间.应用BaFCl_0.5Br_0.5:Sm²⁺(2%)进行了实验,分析了单脉冲烧孔的孔深.     

A simultaneous redox, alkylation, self-assembly reaction under solvothermal conditions afforded a luminescent copper(I) chain polymer constructed of Cu3I4- and EtS-4-C5H4N+Et components (Et = CH3CH2)

A simultaneous redox, alkylation, self-assembly reaction under solvothermal conditions afforded a novel copper(I) chain polymer constructed of luminescent Cu3I4- and unprecedented EtS-4-C5H4N+Et components (Et = CH3CH2).     

Design,fabrication and characterization of the X-ray supermirrors

With the development of the multiplayer technology, the multilayer mirrors have been widely used in many fields, such as the soft X-ray astronomical telescope, soft X-ray microscopy, extreme ultraviolet lithography, applications of synchrotron radiation, plasma diagnosis, and so on. However, in the hard X-ray region, especially for the wavelength shorter than 0.1 nm, the optical elements based on the traditional multilayers or the single high-Z metal coatings cannot accommodate the advancemen…     

Hydrothermal growth and optical properties of doughnut-shaped ZnO microparticles

Doughnut-shaped ZnO microparticles have been grown through a hydrothermal reaction in citrate solution at 120 degrees C. FESEM reveals that these microparticles consist of regular arranged nanoplates, and there is a concave on the surface of each microparticle. The existence of citrate is vital to the formation of the complex microparticles. Room temperature photoluminescence measurements show strong UV band emission. The yellow and green emissions related to the structure defects can be barely observed, indicating the high crystalline perfection of these microparticles.     

Diode-pumped passively mode-locked Nd:GdVO<Subscript>4</Subscript> laser with a GaAs saturable absorber mirror

We report on a diode end-pumped passively mode-locked Nd:GdVO₄ laser. By using a GaAs wafer simultaneously as the saturable absorber and the output coupler, stable continuous-wave mode locking was achieved. The pulse width was measured to be 18.9 picoseconds at a repetition rate of 370 MHz. The most remarkable property of the laser is that its repetition rate can be changed from 370 MHz to 3.348 GHz by simply changing the cavity length. An average output power of 3.46 W at a 3.348 GHz repetition rate was obtained with a 14 W pump power. To our knowledge, this is the first demonstration of a passively mode-locked Nd:GdVO₄ laser using a GaAs wafer as the saturable absorber. PACS 42.55.Rz; 42.60.Fc; 42.55.Xi.     

From arm-shaped layers to a new type of polythreaded array: a two fold interpenetrated three-dimensional network with a rutile topology

The self-assembly based on 2D motifs with side arms leads to the formation of a new type of polythreaded network which exhibits a 2-fold interpenetrated 3D array if H-bonds are taken into account.