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Synthesis and characterization of luminescent organic-inorganic hybrid nanocomposite from polyhedral oligomeric silsesquioxane 被引量:1
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作者 Yan 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第6期753-757,共5页
A novel polyhedral oligomeric silsesquioxane(POSS)-based organic-inorganic hybrid nanocomposite(EF-POSS) was prepared by Pt-catalyzed hydrosilylation reaction of octahydridosilsesquioxane(T_8H_8,POSS) with a luminesce... A novel polyhedral oligomeric silsesquioxane(POSS)-based organic-inorganic hybrid nanocomposite(EF-POSS) was prepared by Pt-catalyzed hydrosilylation reaction of octahydridosilsesquioxane(T_8H_8,POSS) with a luminescent substituted acetylene(2- ethynyl-7-(4-(4-methylstyryl)styryl)-9,9-dioctyl-9H-fluorene(EF)) in high yield.The hybrid nanocomposite was soluble in common solvents such as CH_2Cl_2,CHCl_3,THF and 1,4-dioxane.Its structure and property were characterized by FTIR, NMR,TGA,UV and PL,respectively.The results show that the hybrid nanocomposite with high thermal stability emits stable blue light as a result of photo excitation and possesses high photoluminescence quantum efficiency(φ_(FL)). 展开更多
关键词 poss organic-inorganic hybrid nanocomposite PHOTOLUMINESCENCE Thermal stability
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Preparation and properties of a POSS-containing organic-inorganic hybrid crosslinked polymer
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作者 Wang Yan Nie Gang Li +1 位作者 Yang Li Hong Yao Xu 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第6期738-742,共5页
A novel POSS-containing organic-inorganic hybrid crosslinked polymer was prepared by hydrosilylation reaction of octahydridosilsesquioxane (TsHs) with 4,4'-bis(4-altyloxybenzoyloxy)phenyl (diene A). Its structu... A novel POSS-containing organic-inorganic hybrid crosslinked polymer was prepared by hydrosilylation reaction of octahydridosilsesquioxane (TsHs) with 4,4'-bis(4-altyloxybenzoyloxy)phenyl (diene A). Its structure and property was characterized by FFIR, 29Si NMR, TGA and ellipsometer, respectively. The results show that the hybrid polymer possesses high thermal stability and low dielectric constant of 1.97 at optical frequencies. 展开更多
关键词 poss HYDROSILYLATION organic-inorganic hybrid polymer Thermal stability Dielectric property
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Structure and properties of low-dielectric-constant poly(acetoxystyrene-co-octavinyl-polyhedral oligomeric silsesquioxane) hybrid nanocomposite 被引量:1
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作者 Zhang, Chao Xu, Hong Yao Zhao, Xian 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第4期488-491,共4页
Low-dielectric-constant poly(acetoxystyrenezhi-co-octavinyl-polyhedral oligomeric silsesquioxane)(PAS-POSS) organicinorganic hybrid nanocomposite was successfully synthesized via one-step free radical polymerization a... Low-dielectric-constant poly(acetoxystyrenezhi-co-octavinyl-polyhedral oligomeric silsesquioxane)(PAS-POSS) organicinorganic hybrid nanocomposite was successfully synthesized via one-step free radical polymerization and characterized by FTIR,high-resolution ~1H NMR,^(29)Si NMR,DSC,TGA,AFM,spectroscopic elhpsometry and dielectric constants measurements. The results show T_g and T_(dec) were elevated dramatically due to the incorporation of inorganic POSS cores.Spectroscopic ellipsometry and dielectric consta... 展开更多
关键词 LOW-DIELECTRIC-CONSTANT hybrid nanocomposite poss
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Synthesis and Characterization of Poly(St-co-BA) Latex with an Organic-Inorganic Hybrid Compound as Emulsifier 被引量:5
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作者 袁俊杰 周树学 +1 位作者 廖建和 武利民 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2003年第4期483-488,共6页
A poly (St-co-BA) latex was successfully synthesized by using an organic-inorganic hybrid compound (OIHC), an aliphatic carboxylate sodium/nano-silica composite, as the emulsifier, and investigated by particle size an... A poly (St-co-BA) latex was successfully synthesized by using an organic-inorganic hybrid compound (OIHC), an aliphatic carboxylate sodium/nano-silica composite, as the emulsifier, and investigated by particle size analyzer, transmission electron microscope (TEM), optical contact angle measurement (OCA) and dynamic mechanical analyzer (DMA). It was found that the protective agent, sodium polyacrylate (PA),could obviously improve the polymerization stability and the functional monomer, glycidyl methacrylate (GMA), could enhance the store stability of the latex. The particle size of poly(St-co-BA) latex decreased and then leveled off as OIHC content increased. TEM shows that the prepared polymers were actually organic-inorganic nanocomposites, and these films have better waterproof property than those prepared by traditional poly(St-co-BA) latex or organic silicone modified poly(St-co-BA) latex. The nanocomposite polymer has much higher glass transition temperature than organic silicone modified poly(St-co-BA) polymer containing the same organic silicone content. 展开更多
关键词 organic-inorganic hybrid compound emulsion polymerization nanocomposite
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POSS/聚合物纳米复合材料的研究进展 被引量:3
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作者 王豪 王秀峰 +2 位作者 王学智 唐亮 魏寅 《材料导报》 EI CAS CSCD 北大核心 2012年第5期144-148,共5页
多面体低聚物倍半硅氧烷(POSS)由于其特殊的笼型结构、纳米尺寸,在制备POSS/聚合物纳米复合材料方面受到了广泛关注。介绍了POSS/聚合物纳米复合材料的主要制备方法(原子转移自由基聚合法、自由基聚合法、共混法、乳液聚合法等),还介绍... 多面体低聚物倍半硅氧烷(POSS)由于其特殊的笼型结构、纳米尺寸,在制备POSS/聚合物纳米复合材料方面受到了广泛关注。介绍了POSS/聚合物纳米复合材料的主要制备方法(原子转移自由基聚合法、自由基聚合法、共混法、乳液聚合法等),还介绍了POSS-聚合物的分子结构,POSS/聚合物纳米材料的形貌、结晶及其影响因素。指出了POSS/聚合物纳米复合材料研究的问题,展望了POSS/聚合物未来的发展趋势。 展开更多
关键词 多面体低聚物倍半硅氧烷 纳米复合材料 有机-无机杂化
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Bridged polyhedral oligomeric silsesquioxane(POSS):A potential member of silsesquioxanes 被引量:2
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作者 Jian Kun Hu Qun Chao Zhang Shu Ling Gong 《Chinese Chemical Letters》 SCIE CAS CSCD 2012年第2期181-184,共4页
Two novel and well-defined polyhedral oligomeric silsesquioxanes(POSS) with two same Si_8O_(12) cores and a reactive NH group, namely bridged-POSS(2a and 2b),have been prepared by the traditional 'corner-cappin... Two novel and well-defined polyhedral oligomeric silsesquioxanes(POSS) with two same Si_8O_(12) cores and a reactive NH group, namely bridged-POSS(2a and 2b),have been prepared by the traditional 'corner-capping' reaction.X-ray diffraction demonstrates that those two POSS have the similar T_8 structure.From the thermo-gravimetric analysis,bridged-POSS shows the belter thermal degradation stability than the contrastive POSS. 展开更多
关键词 Polyhedral oligomeric silsesquioxane Bridged poss The corner-capping reaction organic-inorganic hybrid
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双(环戊二烯基)二氯化锆催化合成乙烯-笼型倍半硅氧烷杂化共聚物及其结构表征 被引量:1
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作者 张贺新 张浩 +2 位作者 张春雨 郝秀峰 张学全 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2012年第8期1850-1853,共4页
通过双(环戊二烯基)二氯化锆(Cp2ZrCl2)催化剂和改良的甲基铝氧烷(MMAO)助催化剂,合成了无机-有机杂化共聚物.研究了2种具有不同单乙烯基反应基团的笼型倍半硅氧烷(POSS)与乙烯的聚合.对共聚产物的结构、热力学性质、分子量及其分布等... 通过双(环戊二烯基)二氯化锆(Cp2ZrCl2)催化剂和改良的甲基铝氧烷(MMAO)助催化剂,合成了无机-有机杂化共聚物.研究了2种具有不同单乙烯基反应基团的笼型倍半硅氧烷(POSS)与乙烯的聚合.对共聚产物的结构、热力学性质、分子量及其分布等进行了研究.共聚单体(POSS)的插入率在0.01%~0.30%之间,随着共聚单体在共聚物中摩尔分数的增大,聚合物的熔点和熔解热降低.共聚物的热重分析结果显示,乙烯-POSS共聚物拥有更高的热分解温度以及较高的热分解残留量.随着POSS的加入,聚合物的分子量明显提高,聚合物的分子量分布变宽. 展开更多
关键词 杂化共聚物 纳米复合材料 乙烯 笼型倍半硅氧烷 双(环戊二烯基)二氯化锆催化剂
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Recent Advances in Detection of Ochratoxin-A 被引量:1
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作者 Ajeet Kaushik Sunil K. Arya +1 位作者 Abhay Vasudev Shekhar Bhansali 《Open Journal of Applied Biosensor》 2013年第1期1-11,共11页
Ochratoxin-A[7-(L-β-phenylalanylcarbonyl)-carboxyl-5-chloro-8-hydroxy-3,4-dihydro-3R-methyl-isocumarin, OTA] is a common food contaminant mycotoxin that enters the human body through the consumption of improperly sto... Ochratoxin-A[7-(L-β-phenylalanylcarbonyl)-carboxyl-5-chloro-8-hydroxy-3,4-dihydro-3R-methyl-isocumarin, OTA] is a common food contaminant mycotoxin that enters the human body through the consumption of improperly stored food products. Upon ingestion, it leads to immuno-suppression and immuno-toxicity. OTA has been known to produce nephrotoxic, teratogenic, and carcinogenic activity (via oxidative DNA damage) in several species. This review introduces potentials of electrochemical biosensor to provide breakthroughs in OTA detection through improved selectivity and sensitivity and also the current approaches for detecting OTA in food products. 展开更多
关键词 BIOPOLYMER Mycotoxins Ochratoxin-A CHITOSAN organic-inorganic hybrid nanocomposite Biosensors
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