The preparation of palladium complex from PdCl2·2H2O and carbosilane dendrimers with pelripheral aminopropyl groups was described. The compound obtained was characterized by IR, H NMR, X-ray photoelectron spectro...The preparation of palladium complex from PdCl2·2H2O and carbosilane dendrimers with pelripheral aminopropyl groups was described. The compound obtained was characterized by IR, H NMR, X-ray photoelectron spectroscopy （XPS） and inductively coupled plasma atomic emission spectrometric （ICP-AES） spectroscopy respectively. The metal complex was employed as catalyst in hydrogenation of organic compounds. The high activity of the complex was probably due to the formation of the coordinatively unsaturated palladium.展开更多
A new PVK-based photorefractive polymer composite sensitized by C60 and doped with a higher content of EO chromophore was prepared. The high optical quality thin-film was formed between two ITOcovered glass electrode...A new PVK-based photorefractive polymer composite sensitized by C60 and doped with a higher content of EO chromophore was prepared. The high optical quality thin-film was formed between two ITOcovered glass electrodes. Two-beam-coupling (2BC) experiment was performed by using a He-Ne laser (at wavelength 632.8nm), and an obvious photorefractive performance was observed. The dependence of two-beamcoupling gain coefficient on the applied poling dc electric field was measured.展开更多
The reactive properties of 1,3-dichloro-1,1,3,3-tetraphenyldisilazane (DCTPS) with water, methanol, phenylamine and lithium salt of hexamethylcyclotrisilazane (D-3(NLi)) were investigated, and four new derivatives wer...The reactive properties of 1,3-dichloro-1,1,3,3-tetraphenyldisilazane (DCTPS) with water, methanol, phenylamine and lithium salt of hexamethylcyclotrisilazane (D-3(NLi)) were investigated, and four new derivatives were obtained.展开更多
A new polysiloxane containing octaphenylctclodisilazane was synthesized from the anionic polymerization of octamethylcyclotetrasiloxane (D-4) and 'seed solution' as initiator. which was prepared by hexamethylc...A new polysiloxane containing octaphenylctclodisilazane was synthesized from the anionic polymerization of octamethylcyclotetrasiloxane (D-4) and 'seed solution' as initiator. which was prepared by hexamethylcyclotrisilozane (D-3) and the lithium salt of N,N'-bis(hydroxydiphenyl)tetraphenylcyclodisilazane.展开更多
The initiation reactions in the anionic non-equilibrium polymerization of octamethy- lcyclotetrasiloxane (D4) initiated by silazyllithiums were investigated. It was found that the structure of the substituents on the...The initiation reactions in the anionic non-equilibrium polymerization of octamethy- lcyclotetrasiloxane (D4) initiated by silazyllithiums were investigated. It was found that the structure of the substituents on the Si atom had great influences on the initiation activity of silazyllithiums.展开更多
Four bis（disiloxanyl）-m-carboranes （（RSiMe2OSiMe2）2-m-C2BloHlo, R = H, vinyl, ethynyl, aUyl） were synthesized from the reaction of bis（hydroxydimethylsilyl）-m-carborane and disilazanes, and characterized by in...Four bis（disiloxanyl）-m-carboranes （（RSiMe2OSiMe2）2-m-C2BloHlo, R = H, vinyl, ethynyl, aUyl） were synthesized from the reaction of bis（hydroxydimethylsilyl）-m-carborane and disilazanes, and characterized by infrared spectra （IR）, nuclear magnetic resonance （NMR） and mass soectrometrv （MS）.展开更多
基金We are grateful to the Natural Seience Fondation of Shandong Province for financial support(Project No.Q 2003 B01and Projecet No.Y 2003 B01)
文摘The preparation of palladium complex from PdCl2·2H2O and carbosilane dendrimers with pelripheral aminopropyl groups was described. The compound obtained was characterized by IR, H NMR, X-ray photoelectron spectroscopy （XPS） and inductively coupled plasma atomic emission spectrometric （ICP-AES） spectroscopy respectively. The metal complex was employed as catalyst in hydrogenation of organic compounds. The high activity of the complex was probably due to the formation of the coordinatively unsaturated palladium.
文摘A new PVK-based photorefractive polymer composite sensitized by C60 and doped with a higher content of EO chromophore was prepared. The high optical quality thin-film was formed between two ITOcovered glass electrodes. Two-beam-coupling (2BC) experiment was performed by using a He-Ne laser (at wavelength 632.8nm), and an obvious photorefractive performance was observed. The dependence of two-beamcoupling gain coefficient on the applied poling dc electric field was measured.
基金The project is supported by the National Natural Science Foundation of China.No.50072033 and No.20074040.
文摘The reactive properties of 1,3-dichloro-1,1,3,3-tetraphenyldisilazane (DCTPS) with water, methanol, phenylamine and lithium salt of hexamethylcyclotrisilazane (D-3(NLi)) were investigated, and four new derivatives were obtained.
文摘A new polysiloxane containing octaphenylctclodisilazane was synthesized from the anionic polymerization of octamethylcyclotetrasiloxane (D-4) and 'seed solution' as initiator. which was prepared by hexamethylcyclotrisilozane (D-3) and the lithium salt of N,N'-bis(hydroxydiphenyl)tetraphenylcyclodisilazane.
文摘The initiation reactions in the anionic non-equilibrium polymerization of octamethy- lcyclotetrasiloxane (D4) initiated by silazyllithiums were investigated. It was found that the structure of the substituents on the Si atom had great influences on the initiation activity of silazyllithiums.
基金the National Natural Science Foundation of China(No.50803070) for financial support
文摘Four bis（disiloxanyl）-m-carboranes （（RSiMe2OSiMe2）2-m-C2BloHlo, R = H, vinyl, ethynyl, aUyl） were synthesized from the reaction of bis（hydroxydimethylsilyl）-m-carborane and disilazanes, and characterized by infrared spectra （IR）, nuclear magnetic resonance （NMR） and mass soectrometrv （MS）.
