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Lin B.,Key Laboratory of Organic Synthesis of Jiangsu Province | Cheng S.,Key Laboratory of Organic Synthesis of Jiangsu Province | Qiu L.,Key Laboratory of Organic Synthesis of Jiangsu Province | Yan F.,Key Laboratory of Organic Synthesis of Jiangsu Province | And 3 more authors.
Chemistry of Materials | Year: 2010

A new type of proton-conducting hybrid membranes were prepared by in situ cross-linking of a mixture of polymerizable oils containing protic ionic liquids (PILs) and silica nanoparticles or mesoporous silica nanospheres. The resultant hybrid membranes are semitransparent, flexible, and show good thermal stability, good and tunable mechanical properties. Incorporation of proper amount of silica fillers significantly increased, the proton conductivity of the membranes, probably due to the ion transport channel or network structures formed in the membranes. However, further addition of silica fillers might block the formed, ion transport, channels and decrease the conductivity of hybrid membranes. Compared with silica nanoparticles, mesoporous silica nanospheres is more effective in enhancing the conductivity and in preventing the release of ionic liquid component from the composite membranes. Under anhydrous conditions, the produced hybrid membranes show proton conductivity up to the order of 1 x 10-2 S/cm at 160°C. These properties make this type of PIL-based hybrid membranes suitable for high-temperature polymer electrolyte membrane fuel cells. © 2010 American Chemical Society. Source


Tan Y.-F.,Key Laboratory of Organic Synthesis of Jiangsu Province | Xu X.-P.,Key Laboratory of Organic Synthesis of Jiangsu Province | Guo K.,Key Laboratory of Organic Synthesis of Jiangsu Province | Yao Y.-M.,Key Laboratory of Organic Synthesis of Jiangsu Province | And 2 more authors.
Polyhedron | Year: 2013

The synthesis, structure and catalytic activity for the polymerization of L-lactide of samarium complexes supported by the carbon-bridged bis(phenolate) ligand 2,2′-methylene-bis(6-tert-butyl-4-methyl-phenoxo) (MBMP 2) are described. The reaction of (C5H5) 3Sm(THF) with MBMPH2 in a 1:1 M ratio in THF at 50 °C produced the bis(phenolato) samarium complex (C5H5) Sm(MBMP)(THF)2 (1) in a nearly quantitative yield. Complex 1 is a useful precursor for synthesizing bis(phenolato) samarium aryloxides. Complex 1 reacted with MBMPH2 in toluene at 80 °C to give the complex (MBMP)Sm(MBMPH)(THF)2 (2). The reactions of complex 1 with some mono-phenols, including 2,6-di-tert-butyl-4-methylphenol, 2,6-diisopropylphenol, 2,6-dimethylphenol and 4-methoxyphenol, in toluene produce the complexes (MBMP)Sm(OC6H2-But 2-2,6-Me-4)(THF)2 (3), (MBMP)Sm(OC6H3-Pri 2-2,6)(THF) 3 (4), (MBMP)Sm(OC6H3-Me2-2,6)(DME) 2 (5) and [(MBMP)Sm(OC6H4-OMe-4)(THF) 2]2 (6). All of these complexes were well characterized by elemental analyses, IR spectra and single-crystal X-ray structure determination, except for complex 2. It was found that complexes 3-6 are efficient initiators for L-lactide polymerization. © 2013 Elsevier Ltd. All rights reserved. Source


Xu Q.-F.,Key Laboratory of Organic Synthesis of Jiangsu Province | Xu Q.-F.,Key Laboratory of Functional Materials of Environment Protection | Ge J.-F.,Key Laboratory of Organic Synthesis of Jiangsu Province | Ge J.-F.,Key Laboratory of Functional Materials of Environment Protection | And 10 more authors.
Journal of Macromolecular Science, Part A: Pure and Applied Chemistry | Year: 2010

A series of novel acrylate monomers bearing stilbene segments with D-π-A structure, 4-methacrylate-4'-nitro stilbene (NS), 4-(6-methacrylate)hexyl-4'- nitro stilbene (HNS) and 4-(6-methacrylate)hexyl-2,3-dimethoxy-4'-nitro stilbene (DMHNS), were synthesized by the Witting reaction and polymerized by free radical polymerization. These stilbene-containing monomers and polymers were fully characterized, and their fluorescent properties in solution and solid state were also investigated. The emission band of monomers and corresponding polymers in solution also showed a remarkable effect with increasing polarity of the solvent. More importantly, the fluorescence emission could be adjusted from green to orange and even red regions by forming donor- -acceptor (D-π-A) construction. Source

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