Tuning the emission of a water-soluble 3-hydroxyflavone derivative by host–guest complexation
作者:Dahua Li、Yuzhi Xing、Lan Ding、Chengfeng Wu、Guangliang Hou、Bo Song
DOI:10.1039/c8sm00349a
日期:——
bio-labeling in aqueous medium. They were extensively studied in various organic solvents for the “excited state intramolecular proton transfer” process, but seldom addressed in aqueous solution due to the poor water solubility. Herein, an amphiphilic molecule bearing 3-hydroxyflavone and oligo(ethylene oxide) (denoted as 3HF-EO) was designed and synthesized. Different from the fluorescence in organic solvents
3-羟基黄酮衍生物作为在水性介质中进行生物标记的荧光探针具有巨大的潜力。他们在各种有机溶剂中对“激发态分子内质子转移”过程进行了广泛研究,但由于水溶性差,因此很少在水溶液中处理。在此,设计并合成了带有3-羟基黄酮和低聚环氧乙烷的两亲分子(表示为3HF-EO)。与有机溶剂中的荧光不同,水溶液中的3HF-EO表现出显着的单一荧光发射,这归因于其阴离子种类的荧光。我们发现荧光强度可以通过主客复合物。α-CD对排放几乎没有影响,而β-CD和γ-CD分别导致3HF-EO的排放增加和减少。的1个H NMR和2D NOESY NMR谱表明,α-CD几乎没有与任何相互作用3HF-EO,而β-CD,γ-CD形成的络合物与一个和两个3HF-EO分别分子。这些结果为调制的荧光强度提供了合理的解释。