White-Light-Emitting Self-Assembled NanoFibers and Their Evidence by Microspectroscopy of Individual Objects
White-Light-Emitting Self-Assembled NanoFibers and Their Evidence by Microspectroscopy of Individual Objects
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DOI：
10.1021/ja106807u
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发表时间：
2011-01-19
影响因子：
15
通讯作者：
Del Guerzo, Andre
中科院分区：
文献类型：
--
作者：
Giansante, Carlo;Raffy, Guillaume;Del Guerzo, Andre
这种蓝光捕光有机凝胶的自组装和特别设计的高荧光四烯产生了具有可调发射特性的纳米纤维。特别是，在近紫外激发下，有机凝胶和纳米纤维的干膜实现了白光发射。共聚焦荧光显微光谱学表明，每个单独的纳米纤维发出白光。动力学研究表明，蓝色发光的蒽衍生物与绿色和红色发光的四烯之间存在能量转移（ET），四烯间也存在ET。此外，显微镜分析表明，纳米纤维在蓝色光谱区域发射偏振光，而在波长大于500 nm的区域发射不明显偏振光。
The self-assembly of a blue-emitting light-harvesting organogelator and specifically designed highly fluorescent tetracenes yields nanofibers with tunable emissive properties. In particular, under near-UV excitation, white light emission is achieved in organogels and dry films of nanofibers. Confocal fluorescence microspectroscopy demonstrates that each individual nanofiber emits white light. A kinetic study shows that an energy transfer (ET) occurs between the blue-emitting anthracene derivative and the green-and red-emitting tetracenes, while inter-tetracene ETs also take place. Moreover, microscopy unravels that the nanofibers emit polarized emission in the blue spectral region, while at wavelengths higher than 500 nm the emission is not significantly polarized.