Fluorescence change systems that can respond to biological objects have attracted attention for use as biological probes and sensors. In this study, we report emission enhancement in a fluorescent aggregate composed of amphiphilic donor-acceptor dye molecules. The emission efficiency of the aggregate was reduced upon introducing a hydrophilic galactopyranose moiety, because of the decrease in the aggregate stability, which in turn was due to disruption of the hydrophilicity-hydrophobicity balance. In contrast, emission enhancement could be achieved by treatment with ß-galactosidase, as a result of the removal of the galactopyranose moiety. The change in aggregate stabilization based on the hydrophilicity-hydrophobicity balance leads to the emission enhancement into detectable β-galactosidase activity.
能够对
生物对象作出反应的荧光变化系统作为
生物探针和传感器引起了人们的关注。在这项研究中,我们报告了由亲
水供体-受体
染料分子组成的荧光聚合物的发射增强。在引入亲
水性半
乳糖部分后,聚合物的发射效率降低,这是由于聚合物的稳定性降低,而稳定性降低又是因为亲
水性和疏
水性的平衡被破坏。相比之下,通过用
β-半乳糖苷酶处理,可以去除半
乳糖部分,从而实现发射增强。基于亲
水性和疏
水性的平衡,聚合物的稳定性发生变化,从而导致发射增强,并检测到
β-半乳糖苷酶活性。