l-Tartaric acid assisted binary organogel system: strongly enhanced fluorescence induced by supramolecular assembly
作者:Chunyan Bao、Ran Lu、Ming Jin、Pengchong Xue、Changhui Tan、Guofa Liu、Yingying Zhao
DOI:10.1039/b504945h
日期:——
A new series of binary organogels, which showed good gelated capability and strongly enhanced fluorescence emission, were designed and prepared by simply mixing two components of L-tartaric acid and alkoxyl substituted stilbazoles. It was found that L-tartaric acid could not only introduce stilbazole with fluorescent property into the gel system, but also provided a main motif for the formation of the gel-phase via multiple hydrogen bonds. Meanwhile, π–π interactions between the complexes also played a key role in the gel formation. The decreased nonradiative process, suggested by the longer fluorescent lifetime of aggregates than that of monomers and the presence of the J-aggregation for the aggregated state, favored the enhanced fluorescence emission.
通过简单地混合 L-酒石酸和烷氧基取代的苯并氮唑两种成分,设计并制备了一系列新型二元有机凝胶,这些凝胶具有良好的凝胶能力和强烈的荧光发射。研究发现,L-酒石酸不仅能将具有荧光特性的苯并氮唑引入凝胶体系,还能通过多重氢键为凝胶相的形成提供主要基团。同时,复合物之间的π-π相互作用也对凝胶的形成起到了关键作用。与单体相比,聚集体的荧光寿命更长,而且聚集态存在 J-聚集,这表明非辐射过程的减少有利于增强荧光发射。