作者:Aurélie Jacquart、Patrick Tauc、Keitaro Nakatani、Eléna Ishow
DOI:10.1039/b916454e
日期:——
Fluorescent and photochromic non-doped thin films have been elaborated from bifunctional molecules exhibiting time-stable glassy properties and combining each a photoisomerizable azo unit covalently linked to a fluorescent moiety through a rigid, saturated and bulky spacer. Photoillumination under polarized light led to the rise of periodically structured emissive reliefs. The microscopic emission modulation was addressed by fluorescence confocal microscopy, and the maxima in emission correlated with the minima in transmission. This clear correspondence features the physical displacement of the fluorophore units, pulled by the azo moieties during their photoinduced motion in the bulk; this accumulation of fluorescent materials followed the impinging light pattern, and could be erased and promoted again under specific illumination conditions.
荧光和光致变色非掺杂薄膜是由双功能分子精心研制而成,这些分子具有时间稳定的玻璃特性,并通过刚性、饱和且体积庞大的间隔物将每个光致异构化的偶氮单元共价连接到荧光部分。偏振光下的光照射导致周期性结构发光浮雕的出现。荧光共聚焦显微镜解决了微观发射调制的问题,发射的最大值与透射的最小值相关。这种清晰的对应关系表明,在体积中光诱导运动期间,荧光团单元被偶氮部分拉动而发生物理位移;荧光材料的这种累积遵循着入射光模式,并且可以在特定的光照条件下被擦除并再次增强。