自组装卟啉纳米管的可见荧光发射
Visible Fluorescence Emission from Self-assembled Porphyrin Nanotubes
摘要：
以meso-四（4-磺酸基苯基）卟啉和Fe（III）meso-四（N-甲基-4-吡啶基）卟啉为原料，在水溶液中自组装制备了卟啉纳米管。从HRTEM图像的分析中判断，直径约为1微米的长管由一束束连接到其上的小管形成。发现通过该方法形成的PNT在432 nm激发时在669 nm处表现出良好的可见光发射，而两种母体卟啉单体均不表现出任何荧光。这一结果突出了PNT作为功能组件在医疗和纳米光子学应用中的生物友好设备设计的范围。
英文摘要：
Porphyrin nanotubes (PNTs) are prepared by self-assembly using meso-tetrakis (4-sulfonatophenyl) porphyrin and Fe(III) meso-Tetra (N-Methyl-4-Pyridyl) porphyrin in water as starting materials. Long tubes of about one micron diameter are formed with bunches of smaller tubes attached to it, as judged from the analysis of HRTEM images. The PNTs formed by this method are found to exhibit good visible emission at 669 nm on excitation at 432 nm whereas both parent porphyrin monomers do not exhibit any fluorescence. This result highlights the scope of PNTs as functional components in the design of biofriendly devices in medical as well as nanophotonics applications.
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