多嵌段聚醚氨酯脲为基质的新型高分子固态离子导体

本文合成了一系列聚乙二醇型多嵌段聚醚氨酯脲，而且用这类聚醚氨酯甩与高氯酸锂制得了一种新型的高分子固态离子导体复合物。在室温和50℃之间，其电导率比聚环氧乙烷为基质的固体电解质的高一到二个数量级，它还具有优良的综合性能。因此，对于室温薄膜蓄电池来说，这种新型的固体电解质是一类良好的候选材料。     

A New Application of Carbon Nanotubes Constructing Biosensor

Carbon nanotubes used for constructing biosensor was described for the first time. Single-wall carbon nanotubes (SWNTs) functionalized with carboxylic acid groups were used to immobilize glucose oxidase forming a glucose biosensor. The biosensor response can be determined by amperometric method at a low applied potential (0.40V).     

Two New Xanthone Glycosides from Securidaca inappendiculate

Two new xanthone glycosides, securixanside B and C, were isolated fron the stems of Securidaca inappendiculate. Their structures were determined as 3-O-β-D-glucopyranosyl-1,7-dihydroxyl-2-methoxyxanthone and 6-O-β-D-glucopyranosyl-1-hydroxy-4,7-dimethoxyxanthone by spectroscopic methods.     

Two Novel Myrinsol Diterpenes from Euphorbia prolifera

Two novel diterpenes,Euphorprolitherin A(1) and Euphorprolitherin B(2), were isolated from the roots of Euphorbia prolifera. Their structures were elucidated on the basis of spectroscopic methods.     

Solid Phase Synthesis of 4H-Pyrimido[2,1-b] Benzothiazol-4-ones from Resin-Bound Cyclic Malonic Ester

The solid phase synthesis of 4H-pyrimido[2,1-6] benzothizaol-4-ones has been reported.     

The Synthesis of Third—order Optical Nonlinear Organic Polyheterocyclic Materials

Synthesis of the third-order nonlinear materials:bis (1,4-dihydroxynaphthalene) tetrathiafulvalene and bis (1,4-dialkoxylnaphthalene) tetrathiafulvalene has been achieved in four steps, starting from 2,3-dichloro-1,4-naphthaquinone. The materials exhibit larger third-order nonlinear optical susceptibilities χ.     

SYNTHESIS AND MOLECULAR STRUCTURE OF Co（Ph2pyPO—N,O）2Cl2[Ph2pyPO=DIPHENYL（2—PYRIDYL）PHOSPHINE OXIDE]

<正> Complex Co(Ph2pyPO-N,O)2Cl2 was synthesized and its crystal and molecular structure was determined. Crystal data: Co(Ph2C5H5NPO-N,O)2Cl2, Mr = 688.4, monoclinic, space group A 2/a, a = 13.085(2), b = 11.134(3), c = 21.769(4)A,β=102.29(1)°,Z = 4, V = 3098.6 A3, DC = 1.476 g/cm3, final R= 0.049 and Rw=0.057 for 2804 independent reflections. The cobalt atom in the title molecules is coordinated by two chlorine atoms and two nitrogen and two oxygen atoms from the two phosphine oxide ligands, forming a distorted octahedron.     

Effect of Particle Size and Capping on Photoluminescence Quantum Efficiency of 1,3,5-Triphenyl-2-pyrazoline Nanocrystals

Organic nanocrystals of 1,3,5-triphenyl-2-pyrazoline(TPP) with a series of sizes were synthesized by reprecipitation method.The luminescence quantum efficiency of TPP nanocrystals increases from 24.2% for the nanocrystals with an average size of 300nm to 34.6% for those with an average size of 20nm.Surface capping by polyvinyl pyrrolidone(PVP) will improve the quantum efficiency of TPP nanocrystals.The size-dependence and capping-induced variation of the luminescence quantum efficiency was elucidated in viewpoint of aggregation quenching and the equilibrium between the TPP monomers and the aggregates in TPP nanocrystals.     

Studies on the Binding Mode of Pinacyanol Chloride to Nucleic Acids

The interaction of pinacyanol chloride(PC) with nucleic acids has been investigated by a series of experiments.Extensive hypochromism,appreciable peak shifts,isosbestic points and new peaks of the product of binding to nucleic acids in the spectra were observed.They showed that the interaction between PC and nucleic acids occurred.The results from absorption spectra of DNA,DNA melting,electrophoresis and fluorescence polarization studies have indicated that PC binds to DNA in nonintercalative way.Consistent with the nonintercalation,the studies of fluorescence titration and absorption titration specified that the binding of PC to nucleic acids occurred by an outside stacking binding,in which nucleic acids served for acting templates,The fact that the new absorption peaks of bound PC at ca,485nm are just close to the absorption bands of Haggregate of PC at high concentrations without DNA further supports the outside stacking binding mode,In addition,other evidence indicated that the interaction between PC and nucleic acids is not purely electrostatic.