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Chinese Chemical Letters 2002年第12期13卷 1174-1177页

作者： Shun Xing SU Zhi Jie ZHANG Zhi min ZHENG ze min xie State Key Laboratory of Engineering Plastics Center for Molecular ScienceInstitute of Chemistrythe Chinese Academy of SciencesBeijing 100080

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... 详细信息

关键词： Anionic non-equilibrium polymerization polysiloxane silazyl-lithiums.

POLYMERIZATION OF OCTAMETHYLCYCLOTETRASILOXANE WITH HEXAMETHYLDISILAZYL-LITHIUM AS INITIATOR

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Chinese Journal of Polymer Science 2001年第1期19卷 7-11页

作者： Zhijie Zhang Ning Zhou Cai-hong Xu ze-min xie Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

This work focused on the anionic polymerization of octamethylcyclotetrasiloxane (D-4, D = Me2SiO2/2) initiated by a new kind of initiator hexamethydisilazyl-lithium (MMNLi). Si-29-NMR spectroscopy and gas chromatography (GC) were used to characterize the polymerization products. The process was accelerated by adding a small amount of high activity monomer D-3 and by raising the polymerization temperature. At the end of polymerization more than 95% of the monomer was converted to polymer and only a very small amount of D-4 and D-5 remained in the polymers.

关键词： high purity polydimethylsiloxane octamethylcyclotetrasiloxane hexamethyldisilazyl-lithium anionic polymerization

Synthesis of Some New Derivatives of 1,3-Dichloro-1,1,3,3-tetraphenyldisilazane

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Chinese Chemical Letters 2001年第1期12卷 35-38页

作者： Cai Hong XU Zhi Jie ZHANG Yong min LI Zhi min ZHENG ze min xie Center for Molecular Science Institute of ChemistryThe Chinese Academy of SciencesBeijing 100080

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... 详细信息

关键词： 1,3-dichloro-1,1,3,3-tetraphenyldisilazane derivatives reactive properties

A Novel Method to Synthesize Polyorganozircosilazane

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Chinese Chemical Letters 2002年第12期13卷 1225-1226页

作者： Chun Juan LIU Li Hua LIU Shi Yan YANG Wei GAO ze min xie State Key Laboratory of Engineering Plastics Center for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100080

A new kind of polyorganozircosilazane as Si/Zr/C/N-based ceramic precursor was synthesized from the condensation reaction of hexamethylcyclotrisilazane lithium salts (D3NLi) and zirconium tetrachloride (ZrCl4). In th... 详细信息

关键词： Polyorganozircosilazane Si/Zr/C/N-based ceramic precursor synthesis.

SYNTHESIS AND CHARACTERIZATION OF SILAZANE OLIGOMER CONTAINING 1,1,3,3,5,5-HEXAMETHYLCYCLOTRISILAZANE

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Chinese Journal of Polymer Science 2000年第5期18卷 449-452页

作者： Cai-hong Xu Ning Zhou ze-min xie Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

A new silazane oligomer containing cyclotrisilazane was synthesized by KH-catalyzed dehydro-coupling reactions between diphenylsilane and 1,1,3,3,5,5-hexamethylcyclotrisilazane (D-3(N)).

关键词： silazane oligomer diphenylsilane cyclotrisilazane dehydro-coupling reaction

HYDROPHOBICITY OF CONTAminATED SILICONE RUBBER SURFACES

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Chinese Journal of Polymer Science 2002年第6期20卷 559-564页

作者： Zhi-min Zheng Cai-hong Xu Jian Jiang Chang-yu Ren Wei Gao ze-min xie Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

Silicone rubber (SIR) shows superior performance when used outdoors, but its surface can be transformed from inherently hydrophobic to hydrophilic by the adsorption of contaminants. Al(OH)(3), Al2O3, quartz powder and active carbon were selected as authentic contaminants. Hydrophobicity of the surface was determined using contact angle measurement. The results indicate that the adsorbability of the contaminants can strongly affect the hydrophobicity of contaminated SIR surface. The increasing rate of contact angle of specimens contaminated by Al(OH)(3) was much faster than that by Al2O3 and quartz due to the adsorption of migrated low molecular weight (LMW) polydimethylsiloxanes. Specimens contaminated by active carbon could achieve surface hydrophobicity within 15 min because active carbon has high adsorbability. Surfaces of contaminated ultrapure SIR, polytetrafluoroethylene (PTFE) and glass remain hydrophilic because they contain no mobile LMW components. The addition of oligomeric polydimethylsiloxanes has little effect on the hydrophobicity of contaminants covered on SIR surface.

关键词： hydrophobicity silicone rubber contact angle contamination

A Facile Synthesis Route to 1,3-dichlorodisilazanes

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Chinese Chemical Letters 2000年第9期11卷 765-766页

作者： Cai Hong XU Ning ZHOU ze min xie Center for Molecular Science, Institute of Chemistry, the Chinese Academy of Sciences, Beijing 100080 Acad Sinica Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

A new 1,3-dichlorodisilazane, 1,3-dichloro-1,3-dimethyl-1,3-divinyldisilazane (DMDV), was prepared from the reaction of hexamethyldisilazane (MMN) and methylvinyldichlorosilane. And use the same method, 1,3-dichloro-1... 详细信息

关键词： Silazanes synthesis dichlorodisilazanes

Synthesis of a New Polysiloxane Containing Octaphenylcyclodisilazane

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Chinese Chemical Letters 2000年第6期11卷 511-512页

作者： Ning ZHOU Zhi Jie ZHANG Cai Hong XU ze min xie(Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences.Beijing 100080) Chinese Acad Sci Ctr Mol Sci Inst Chem Beijing 100080 Peoples R China

A new polysiloxane containing octaphenylctclodisilazane was synthesized from the anionic polymerization of octamethylcyclotetrasiloxane (D-4) and 'seed solution' as initiator. which was prepared by hexamethylcyclotris... 详细信息

关键词： polysiloxane octaphenylcyclodisilazane synthesis

New synthesis of bis(disiloxanyl)-m-carboranes

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Chinese Chemical Letters 2012年第6期23卷 650-652页

作者： Xue Chao Zhang Ling Hong Kong Hong Jie Sun Yong Xia Tan Li Na Dai Xue Zhong Zhang Zhi Jie Zhang ze min xie Laboratory of Advanced Polymer Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China College of Chemistry and Chemical Engineering Graduate University of Chinese Acatemy of Sciences Beijing 100049 China

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... 详细信息

关键词： Bis(disiloxanyl)-m-carborane Silazane Condensation Siloxane

Upconversion Nanoparticle-Organic Dye Nanocomposites for Chemo- and Biosensing

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Journal of Analysis and Testing 2023年第4期7卷 345-368页

作者： Mengchao Guo Xiumei Chen ze Yuan min Lu Xiaoji xie School of Flexible Electronics(Future Technologies)&Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816China

The emerging nanocomposite of lanthanide-doped upconversion nanoparticles(UCNPs)and organic dyes(ODs),which combines the advantages of each component,possesses a series of attractive properties,making the nanocomposite suitable for *** the rising demand for chemo-and biosensing,a variety of sensors based on UCNP-OD nanocomposites have been developed for various *** recent evolution of UCNP-OD-based sensors has enabled the detection of targeted analytes in situ,in vitro,and in *** this review,beginning with a brief introduction to the fabrication and working principles of UCNP-OD-based sensors,we discuss UCNP-OD-based sensors for chemo-and *** on recent representative examples,we review UCNP-OD-based sensors for detecting different analytes,including ions,reactive oxygen species,reactive nitrogen species,gases,and biomolecules,by paying particular attentions to the design strategies and working *** lastly point out some remaining challenges and potential directions for the further development of UCNP-OD-based sensors.

关键词： Sensors Rare earths Hybrid materials Luminescence Nanomaterials