Synthesis, Structure and Characterization of Manganese（ Ⅱ ） Coordination Polymer with Camphoric Acid and 1, 10-Phenanthroline

IntroductionThe syntheses of metal-organic coordination poly-mers have been attracting increasing attention owing tothe potential applications of their functional materials incatalysis,non-linear optics,magnetism sensors andmolecular recognition[1—7].Coordination polymers crys-tallized from polyaromatic acids and metal-ions are ofgreat interest for their polymeric structures and porousproperties[8—12].Their network topologies based on mo-lecular building blocks are usually controlled and mod…     

Extraction and Identification of Ginsenoside Re and Its Effects and Mechanism of Protecting Acute Renal Ischemia-reperfusion Injury in Rats

This paper studies the extraction and identification of ginsenoside Re from ginseng fruits and investigates the effect and mechanism of ginsenoside Re of protecting acute renal ischemia-reperfusion injury in rats.Having been smashed,the ginseng fruits were ultrasonically extracted twice with 95% ethanol for 30min each.Having been concentrated,the solution was dissolved with distilled water and separated by two-column chromatography,of which one was packed with macroporous resin D4020,and the other was packe...     

Matrix Solid-phase Dispersion Extraction of Alkaloids from the Roots of Aconitum kusnezoffii Reichb

Matrix solid-phase dispersion(MSPD) was developed for the extraction of four alkaloids, including aconitine, mesaconitine, hypaconitine and deoxyaconitine, from the roots of Aconitum kusnezoffii Reichb. The determination of the analyte was carried out by high performance liquid chromatography with UV detection. The alkaline alumina was used as sorbent. The mixture of acetonitrile and water was used as elution solvent. Several extraction parameters, such as type of sorbent, the ratio of sample to solid suppo...     

Preparing Nano-ZnS by Solid State Reaction at Room Temperature

Solid-state reaction has been studied for a long time1-3. In recent years, some researches have been focused on the preparation of coordination compounds at low temperatures or even at room temperature4-5. In this letter, preparation of ZnS nanoparticles by using solid state reaction at room temperature is reported.ZnS nanoparticles were prepared as follows: Zn(CH3COO)2 and Na2S?9H2O, in equal molar ratio, were ground in agate mortar. After 20 minutes, the powder was washed by water and …     

Lectin Conjugated Gold Nanoparticle-based Colorimetric Assay for Studying the Interactions of Antibiotic with Living Cell

The interactions of antibiotic with living cells were studied by lectin conjugated gold nanoparticles(GNPs) based colorimetric assay. Because of the high affinity of lectin for saccharides, the lectin conjugated GNPs are able to employ as indicators for monitoring the antibiotic induced changes of glycosyl complexes. The interactions of a well known antibiotic, tunicamycin, with two different cell lines, HeLa and SHG-44, were selected to establish this assay. In the presence of tunicamycin, the dose- and ti...     

Synthesis and Characterization of Chitosan-Albumin Conjugates as pH-Sensitive Biodegradable Hydrogels

A new kind of biodegradable pH-sensitive drug delivery system was developed via chitosan-albumin conjugate hydrogel. Through changing the feeding modes of reactants, two types of hydrogels(comb-type and reticular-type) were synthesized by amidation reactions between 6-O-succinoylated N-phthaloyl chitosan and albumin. The structures and morphologies of the hydrogels were characterized by SEM. And their water swelling capacity, drug loading and releasing properties at different pH values were also investigate...     

Polyfluorenes containing pyrazine units:Synthesis,photophysics and electroluminescence

A series of conjugated copolymers of 9,9-dioctylfluorene and symmetrical pyrazine unit (BY) were synthesized by Suzuki copolymerization and were used as novel light-emitting materials in PLEDs.Efficient energy transfer was observed in both thin film and solution.Compared with the lowest occupied molecular orbital (LUMO) energy level of the polyfluorenes homopolymer (PFO),the lower LUMO energy levels of copolymers indicated that the introduction of the BY unit would be benefit to electron injection.The turn-...     

功能性有序微结构的制备及潜在应用

随着科技的发展进步,具有特殊功能的有序微结构日渐引起人们浓厚的研究兴趣,并被广泛应用于微电子器件、微反应器、生物化学传感器以及光学器件等领域.本文总结了我们课题组在微观表面图案化和有序微结构制备及应用方面的研究工作,重点介绍我们在该方向工作的最新进展,并对该领域的发展前景进行了展望.     

Photonic Bandgap Properties of Atom-lattice Photonic Crystals in Polymer

The present paper covers the various photonic crystals(PhCs) structures mimicking real atom-lattice structures in electronic crystals by using the femtosecond laser-induced two-photon photopolymerization of SU-8 resin. The bandgap properties were investigated by varying the crystal orientations in <111>, <110> and <100> of diamond-lattice PhCs. The photonic stop gaps were present at λ=3.88 μm in <111> direction, λ=4.01 μm in <110> direction and λ=5.30 μm in <100> direction, respectively. In addition, defect...     

溶胶—凝胶法制备钕玻璃纤维

钕玻璃是一种重要的光学材料。它作为激光工作物质已在激光核聚变、中小能量器件、波导激光器和光纤通讯上获得重要的应用。制备钕玻璃及其纤维通常需要在高温熔融状态下进行,操作条件苛刻。溶胶-凝胶法是在较低温度下制备无机材料的新方法,目前正受到人们的重视。