Surface-grafted viologen for precipitation of silver nanoparticles and their combined bactericidal activities.
Surface-grafted viologen for precipitation of silver nanoparticles and their combined bactericidal activities.
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DOI：
10.1021/la049132m
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发表时间：
2004-07
期刊：
影响因子：
--
通讯作者：
Z. Shi;K. Neoh;E. Kang
中科院分区：
文献类型：
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作者：
Z. Shi;K. Neoh;E. Kang
合成了一种紫精N-己基-N '-（4-乙烯基苄基）-4，4'-联吡啶二硝酸盐（HVVN），并将其接枝到聚对苯二甲酸乙二酯（PET）膜上。通过盐溶液中银离子的光诱导还原，可以在HVVN-PET膜表面沉积银纳米颗粒。通过改变反应时间可以改变银纳米颗粒的尺寸和分布。接枝共聚在基材表面上的HVVN的吡啶鎓基团对大肠杆菌具有杀菌效果，并且这种抗菌效果可以通过在HVVN-PET膜上掺入银纳米颗粒而非常显著地增强。HVVN和银的双重功能在长时间浸泡在磷酸盐缓冲溶液中和在老化室中老化后保持稳定。
A viologen, N-hexyl-N'-(4-vinylbenzyl)-4,4'-bipyridinium dinitrate (HVVN), was synthesized and subsequently graft-copolymerized on poly(ethylene terephthalate) (PET) films. Silver nanoparticles can be deposited on the surface of the HVVN-PET film through photoinduced reduction of the silver ions in salt solution. The size and distribution of the silver nanoparticles can be varied by changing the reaction time. The pyridinium groups of the HVVN graft-copolymerized on the surface of the substrate possess bactericidal effects on Escherichia coli, and this antibacterial effect can be very significantly enhanced by the incorporation of silver nanoparticles on the HVVN-PET film. The dual functionalities of HVVN and silver remain stable after prolonged immersion in phosphate buffer solution and after aging in a weathering chamber.