Preparation and property of a novel soluble electron transport POSS-based hybrid material

A novel POSS-based organic/inorganic hybrid covalently attached at molecular level, 2-（4-（allyloxy）phenyl）-5-（4-（octyloxy）phenyl）-1,3,4-oxadiazole-POSS （6） （abbreviated as oxadiazole-POSS） was synthesized by Pt（dcp） catalyst. The hybrid was soluble in common organic solvents such as CHCl3, toluene, C2H4Cl2, and THF. Its structures and properties were characterized and evaluated with FTIR, 1^H NMR, 13^C NMR,29^Si NMR, EA, TGA, DSC, GPC, and CV, respectively. The results show that the novel hybrid possesses high thermal stability and good electron injection ability.

Preparation and properties of a POSS-containing organic-inorganic hybrid crosslinked polymer

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.

Preparation and property of a novel soluble oxadiazole-containing functional polyacetylene

A novel high molecular weight functional polyacetylene bearing oxadiazole group as a pendant, poly{4-[2-（4-octoxyphenyl）-1,3,4-oxadiazolyl]-benzenyloxypropynylene}, was synthesized by [Rh（nbd）Cl]2-Et3N catalyst. The polymer was soluble in common organic solvents such as CHCl3 and THE The structures and properties of monomer and polymer were characterized and evaluated with FTIR, NMR, UV, TGA, GPC, and CV, respectively. The results show that the polymer possesses high thermal stability and well electron-injection property.

Synthesis and characterization of poly(methyl methacrylate-co-polyhedral oligomeric silsesquioxane)hybrid nanocomposites

一篇小说(甲基 methacrylate-co-polyhedral oligomeric silsesquioxane ) poly，混合 nanocomposite 被自由基聚合综合并且描绘了由(1 ) H NMR，(29 ) Si NMR，和 TGA 技术。与 PMMA 人聚合物相比， nanocomposite 有更好的热稳定性。

Synthesis and optical limiting in copolymers of C_(60) and 1-phenyl-1-butyne

While WC_16-Ph_4Sn is a poor catalyst for the polymerization of l-phenyl-butyne (PB) at room temperature, it effectively polymerizes PB in the presence of C_(60), giving high molecular weight polymers in high yields. The polymer is soluble in THF and chloroform and spectroscopic analysis reveals that Coo has copolymerized with PB. Thus, C_(60) plays dual roles of comonomer and cocatalyst in the acetylene polymerization. The copolymers strongly attenuate 532-nm laser pulses, whose limiting performance is superior to that of parent C_(60)

Preparation and Nonlinear Optical Property of Azobenzene Substituted Polyacetylene

Two new functional polyacetylenes bearing different azobenzene group, -{ HC=C[azo-N （CH3）CH2CH2OH] } n-, [poly（EHAB）; azo = 4,4＇-azobenzene] and - { HC=C[azo-N（CH3）CH2CH2O COC3H7]},-, [poly（EEAB）]} were prepared by [Rh（nbd）Cl]2-Et3N catalysts. Poly（EHAB） has poor solubility while poly（EEAB） can be dissolved in common solvent. The polymers were characterized by FHR, ^1H NMR, UV and GPC. The nonlinear optical property of the soluble poly（EEAB） was investigated with 8 ns width pulse at 532 nm by Z-scan technique. The results show that poly（EEAB） is endowed with the larger third-order nonlinear optical property.

A novel poly[acrylonitrile-co-(3-ammoniumcarboxylate-butenoic acid-methylester)]copolymer for carbon fiber precursor

A novel bifunctional comonomer 3-ammoniumcarboxylate-butenoic acid-methyl ester （ACBM） was synthesized tor preparing poly[acrylonitrile-co-（3-ammoniumcarboxylate-butenoic acid-methyl ester）] [P（AN-co-ACBM）] copolymer as a carbon fiber precursor. Differential scanning calorimetry results show that the P（AN-co-ACBM） exhibits a significantly improved stabilization performance compared with polyacrylonitrile （PAN）, such as lower cyclization temperature and smaller rate of heat release, which is mainly attributed to the initiation of ACBM through an ionic cyclization mechanism. Simultaneously, the rheological analysis shows that P（AN-co-ACBM） possesses better spinnabilitv than PAN.

A versatile nanobuilding precursor for the effective architecture of well-defined organic/inorganic hybrid via click chemistry

A novel octazido substituted nanobuilding precursor, octakis[dimethy（p-azidomethylene）siloxyl]octasilsesquioxane （ODA）, was prepared by the conventional diazo-transfer reaction of octalds[dimethy（p-chloromethylene）silyl]octasilsesquioxane （ODC） with NAN3, and its structure was characterized by FT-IR, 1H, a3C, 29Si NMR and MALDI-TOF MS, respectively. The structural rearrangement of POSS core in the synthesis strategy of ODA developed in this work was effectively prohibited in comparison with traditionary azidization process. The resultant ODA was not only soluble in common solvents such as CHC13, THF, toluene, DMF and DMSO, but also could effectively serve as a versatile nanobuilding precursor for the architecture of well-defined organic- inorganic hybrids via click chemistry.

Preparation and near-infrared optical limiting property of fluorene-containing functional polyacetylene

A novel functional polyacetylene containing fluorene group as a pendant,poly（2-（p-methylstyrene）-7-acetylene-9,9-dioctyl-fluorene）, was synthesized in moderate yield by[Rh（nbd）Cl]_2-Et_3N catalyst.The structures and properties of monomer and polymer were characterized and evaluated with FTIR,NMR,UV-vis,GPC and Z-scan,respectively.The results show that the incorporation of fluorene into polyacetylene has endowed the resultant polymer with well optical limiting properties for laser at wavelength 780 nm based on two-photon absorption mechanism.