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Gu P.-Y.,Soochow University of China | Gu P.-Y.,Key Laboratory of Functional Materials of Environment Protection | Xu Q.-F.,Soochow University of China | Xu Q.-F.,Key Laboratory of Functional Materials of Environment Protection | And 7 more authors.
E-Polymers | Year: 2010

2-Bromoisobutyric acid 4-(2-benzothiazole-2-yl-vinyl)-phenyl ester (BPBVE) was used for the heterogeneous atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) with a copper(I)bromide/2, 2'-bipyridine catalytic system. Factors such as the reaction temperature and mole ratio of catalyst to initiator, which could affect the ATRP system, were discussed in the paper. The functional end group was characterized via UV-vis and 1H NMR spectroscopy. The rates of polymerizations exhibited first-order kinetics with respect to the monomer, and a linear increase in the number-average molecular weight with increasing monomer conversion was observed for these initiation systems. The polydispersity indices (PDI) of the polymer were relatively low (1.07-1.23) up to high conversions. This PMMA with BPBVE as end group shows strong emission at blue-light area whether in solution or in solid. In particularly, emission was decreased (or quenched) with appearance of metal cations (Zn2+, Co2+, Ni2+, Pb2+, Mn2+, Cu2+, Fe3+, Ag+) in DMF solution. 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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