Université Bordeaux 1, CNRS, Institut des Sciences Moléculaires, NEO Nanostructures Organiques, 351 crs de la Liberation, 33405 Talence cédex, France.
J Am Chem Soc. 2011 Jan 19;133(2):316-25. doi: 10.1021/ja106807u. Epub 2010 Dec 23.
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.
自组装的蓝色发光光捕获有机凝胶剂和专门设计的高荧光四并苯可得到具有可调发射性质的纳米纤维。特别地，在近紫外光激发下，在有机凝胶和纳米纤维的干膜中实现了白光发射。共焦荧光显微镜证明了每根单独的纳米纤维都能发射白光。动力学研究表明，在蓝色发射的蒽衍生物和绿色和红色发射的四并苯之间发生了能量转移（ET），而四并苯之间的 ET 也在发生。此外，显微镜揭示了纳米纤维在蓝色光谱区域发射偏振发射，而在 500nm 以上的波长处，发射没有明显的偏振。
