生物特异性功能高分子

模仿天然生物活性高分子关键作用点的化学组成，在高分子链上接上各种官能团或化学残基，制备具有与该天然高分子相似生物活性的高分子，即生物特异性功能高分子。本文主要介绍拟肝素高分子和似粘连 蛋白高分子两种生物特异性功能高分子。     

Incoherent subharmonic light scattering in isotropic media

Incoherent subharmonic light scattering in isotropic media is a new kind of nonlinear light scattering, which involves single input photon and multiple output photons of equal frequency. We investigate theoretically the dependence of the subharmonic scattering intensity on the hyperpolarizability of molecules and the incident intensity using nonlinear optics theory similar to that used for Hyper-Rayleigh scattering and degenerate optical parametric oscillators. It is derived that the subharmonic scattering intensities grow exponentially or superexponentially with the hyperpolarizability of molecules and the incident intensity.     

A Novel Photoproduct of 1, 3-Dimethyluracil in Phosphate Buffered-saline

1, 3-Dimethyluracil （DMU） in phosphate buffered-saline （PBS, pH=8） was irradiated by a medium pressure mercury lamp （MPML） and produced a novel compound C6H9N2O6P. The composition and structure of the compound has been identified by elemental analysis, EIMS, UV, IR, ^1H and ^31P-NMR.     

H3PW12O40 and its cesium salts as pentane isomerization catalysts at ambient temperature

The activity of Mg−Al basic heterogeneous catalysts in the reactions of alcohols with ethylene oxide was studied. The kinetics of alcohol oxyethylation was examined. The kinetic equation of the reaction was determined and the structure of products was studied. The distribution coefficients of the oxyethylation reaction products were calculated. A comparison of the catalytic activity of Mg−Al hydroxides and products of their thermal treatment was made.     

Polylactide hollow spheres fabricated by interfacial polymerization in an oil-in-water emulsion system

A one-step pathway has been adopted to fabricate biodegradable polylactide (PLA) hollow spheres by interfacial polymerization in an oil-in-water emulsion system. The mechanism of sphere formation is suggested with respect to interfacial cross-linking polymerization and subsequent precipitation of the unreacted PLA macromonomers onto the preformed shells. Their hollow nature and morphology were verified by transmission electron microscopy and scanning electron microscope characterizations.     

贵金属催化剂用于抽余油加氢精制

研制了一种以铂为主的担载型芳烃抽余油加氢精制催化剂。与传统的Ni-Mo-Al型催化剂相比,上述贵金属催化剂使用温度低(160—185℃),空速高(4—6h~(-1)),寿命长。是一种较为理想的抽余油加氢催化剂。该催化剂已在工业上得到成功应用。     

用化学除氧技术以1,2-二溴乙烷作重原子微扰剂-β-环糊精诱导室温燐光法测定4种痕量多环芳烃

本文首次将亚硫酸钠化学除氧技术应用于β－环糊精诱导室温燐光（β－CD－RTP）法中，除氧简便快速（1～1．5min），测定了痕量二氢苊、芴、菲、7，8－苯并喹啉。1，2－二溴乙烷作重原子微扰剂，其用量减少到每10mL中5μL，体系基本澄清，pH≈6．8，分析特性优于通氮除氧技术所得结果。     

SPME/GC-MS测定水中芥子砜

日本遗弃在华化学武器中的化学战剂芥子气和芥子亚砜氧化均生成芥子砜,芥子砜有糜烂性[1],所以建立灵敏、快速的监测环境样品中芥子砜的分析方法具有重要意义.本文采用固相微萃取法(SPME)[2]/气相色谱-质谱(GC-MS)监测技术,对水中痕量芥子砜进行了测定,结果表明,本法完全满足水中芥子砜的监测要求.     

Crystal structure and luminescence property of ternary terbium p-aminobenzoic acid complexes with different second ligands

Ternary terbium complexes with p-aminobenzoic acid (HL), [TbL₃(DMSO)(H₂O)]₂ (1), [TbL₃(DMF)(H₂O)]₂ (2) and [TbL₃(Bpy)(H₂O)]₂·2H₂O (3) (DMSO=dimethyl sulfoxide, DMF=N, N- dimethylformamide, Bpy=2, 2′- bipyridyl) have been synthesized, and their crystal structures determined. The luminescence properties of these complexes, including both the emission quantum yield and the fluorescence lifetime, have been investigated. The effect of a second ligand on the crystal structure and luminescence property of the ternary terbium p-aminobenzoic acid complexes, and the relationship between luminescence properties and crystal structure, including coordination mode of the L⁻ ligand and the characteristics of a second ligand, are discussed.     

SYNTHESIS AND CHARACTERIZATION OF A NEW POLYSILOXANE CONTAINING N,N’-BIS(DIPHENYLSILYL)TETRAPHENYLCYCLODISILAZANE

A new kind of polysiloxane containing N,N'-bis(diphenylsilyl)tetraphenylcyclodisilazane was prepared by anionicnon-equilibrium polymerization with a "seed solution" as initiator. The monomer, N,N'-bis(hydroxydiphenylsilyl)-tetraphenyl-cyclodisilazane (BHPTPC), was synthesized via the hydrolysis of N,N'-bis(chlorodiphenylsilyl)tetraphenyl-cyclodisilazane (BCPTPC). A new method for the preparation of BCPTPC is also reported here with high yield and simplermanipulation. The synthesized polysiloxane containing N,N'-bis(diphenylsilyl)tetraphenylcyclodisilazane was characterized by ~1H-NMR, ~(29)Si-NMR, gel permeation chromatography (GPC) and intrinsic viscosity.