通过RITP和“Click”化学制备空心球-g-PS-co-PVBPC光功能杂化材料
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摘要
以空心球表面负载的偶氮基团为引发剂,以苯乙烯和对叠氮甲基苯乙烯为单体,通过反向碘原子转移自由基聚合(RITP)制备了空心球-g-苯乙烯-co-对叠氮甲基苯乙烯(Hollow sphere-g-PS-co-PVBA)杂化材料,再通过N-炔丙基咔唑与空心球-g-PS-co-PVBA的"Click"反应,得到具有光功能的空心球-g-PS-co-PVBPC有机-无机杂化材料。并用扫描电镜(SEM)、红外光谱(FT-IR)、热重分析(TG)、核磁共振(1H-NMR)和荧光光谱等对产物进行了测试和分析。结果表明,空心球表面接枝了苯乙烯和对叠氮甲基苯乙烯的无规共聚物,接枝率约为36%;聚合体系按照反向碘原子转移自由基聚合(RITP)机理进行;空心球-g-PS-co-PVBPC杂化材料在360 nm附近出现了强烈的荧光发射峰,说明点击反应的成功进行。
The hollow sphere-g-poly(styrene)-co-poly(4-vinylbenzyl azide)(hollow sphere-g-PS-co-PVBA) hybrid material was prepared via reverse iodine transfer polymerization(RITP) using hollow sphere supported azo group as initiator,styrene and 4-vinylbenzyl azide as monomers.After that,hollow sphere-g-PS-co-PVBPC optical-functional organic-inorganic hybrid material was fabricated by "Click" reaction of N-propargyl-carbazole and hollow sphere-g-PS-co-PVBA.The samples were characterized by FT-IR,SEM,TG,1H-NMR and luminescence spectroscopy.The results show that the copolymer of styrene and 4-vinylbenzyl azide has grafted on the hollow sphere surface and the graft ratio is about 36%.The polymerization is carried out via reverse iodine transfer polymerization(RITP).In emission spectrum of hollow sphere-g-PS-co-PVBPC hybrid material,there is a strong characteristic fluorescence emission bands at about 360 nm,proving the success of the "Click" reaction.
The hollow sphere-g-poly(styrene)-co-poly(4-vinylbenzyl azide)(hollow sphere-g-PS-co-PVBA) hybrid material was prepared via reverse iodine transfer polymerization(RITP) using hollow sphere supported azo group as initiator,styrene and 4-vinylbenzyl azide as monomers.After that,hollow sphere-g-PS-co-PVBPC optical-functional organic-inorganic hybrid material was fabricated by "Click" reaction of N-propargyl-carbazole and hollow sphere-g-PS-co-PVBA.The samples were characterized by FT-IR,SEM,TG,1H-NMR and luminescence spectroscopy.The results show that the copolymer of styrene and 4-vinylbenzyl azide has grafted on the hollow sphere surface and the graft ratio is about 36%.The polymerization is carried out via reverse iodine transfer polymerization(RITP).In emission spectrum of hollow sphere-g-PS-co-PVBPC hybrid material,there is a strong characteristic fluorescence emission bands at about 360 nm,proving the success of the "Click" reaction.
引文
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[4]Alves L M,Pardal T C D,Martins P A F.Forming of thin-walledhollow spheres using sacrificial polymer mandrels[J].Int.J.Mach.Tools Manuf.,2009,49(6):521-529.
[5]Wang X,Wan F,Liu J,et al.Synthesis and characterization ofCu3P hollow spheres by a facile soft-template process[J].J.AlloyCompd.,2009,474(1):233-236.
[6]Li C,Liu X,Yuan M,et al.Unusual fluorescence enhancement ofanovel carbazolyldiacetylene bound to gold nanoparticles[J].Lang-muir,2007,23(12):6754-6760.
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