Synthesis of bismaleimides bearing electron-donating chromophores and their fluorescence behavior during copolymerization | |
Zhang, X ; Jin, YH ; Diao, HX ; Du, FS ; Li, ZC ; Li, FM | |
刊名 | macromolecules
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2003 | |
关键词 | UV-REFLECTION SPECTROSCOPY PHOTOINITIATED POLYMERIZATION PHOTOCHEMICAL BEHAVIOR CURE CHARACTERIZATION OPTICAL APPLICATIONS POLYURETHANE-UREA VINYLOXY MONOMER ACRYLIC-MONOMERS CROSS-LINKING POLYMERS |
DOI | 10.1021/ma0205111 |
英文摘要 | Bismaleimides and bisitaconimides bearing diphenylmethylamine, triphenylamine, or 2,5-diphenyl-1,3,4-oxadiazole chromophore (symbolized as A((=)-D()*())-A((=))), as well as their saturated model compounds were synthesized, and their steady-state and time-resolved fluorescence spectra were investigated. These A((=))-D(()*())-A((=)) monomers display strong intramolecular fluorescence quenching. Their fluorescence quantum yields and lifetimes are generally lower than those of their model compounds. It was found that the electron-poor C=C bond of maleimide-and itaconimide units (A((=))) plays a key role in the intramolecular quenching, which is correlated to the electron-accepting ability of A((=)) and the geometry arrangement between A((=)) and electron-donating chromophore (D(()*())). The intramolecular quenching was attributed to an intramolecular charge transfer interaction, which was confirmed by intermolecular fluorescence quenching and time-resolved fluorescence studies. On the basis of the intramolecular quenching, a new fluorescence approach can be developed to monitor the process of the polymerization and curing of bismaleimides, which can directly reflect the C=C bond consumption during polymerization and curing. The new fluorescence approach can be utilized not only by an intrinsic fluorescence technique but also by an extrinsic fluorescence technique.; Polymer Science; SCI(E); EI; 0; ARTICLE; 9; 3115-3127; 36 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/255914] ![]() |
专题 | 化学与分子工程学院 |
推荐引用方式 GB/T 7714 | Zhang, X,Jin, YH,Diao, HX,et al. Synthesis of bismaleimides bearing electron-donating chromophores and their fluorescence behavior during copolymerization[J]. macromolecules,2003. |
APA | Zhang, X,Jin, YH,Diao, HX,Du, FS,Li, ZC,&Li, FM.(2003).Synthesis of bismaleimides bearing electron-donating chromophores and their fluorescence behavior during copolymerization.macromolecules. |
MLA | Zhang, X,et al."Synthesis of bismaleimides bearing electron-donating chromophores and their fluorescence behavior during copolymerization".macromolecules (2003). |
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