Kano Hiroya, Tanoue Daichi, Shimaoka Hiroaki, Katano Kohei, Hashimoto Takeshi, Kunugita Hideyuki, Nanbu Shinkoh, Hayashita Takashi, Ema Kazuhiro
Department of Engineering and Applied Science, Faculty of Science and Technology, Sophia University.
Anal Sci. 2014;30(6):643-8. doi: 10.2116/analsci.30.643.
An inclusion complex consisting of a boronic acid fluorophore (C1-APB) and β-cyclodextrin (β-CyD) acts as a supramolecular sugar sensor whose response mechanism is based on photoinduced electron transfer (PET) from the excited pyrene to the boronic acid. We have investigated the PET process in C1-APB/CyD complexes by using time-resolved photoluminescence (TRPL) measurements at room temperature, and have succeeded in estimating the electron-transfer time to be about 1 ns. We have also studied the effects of CyDs on the PET process by comparing two kinds of CyDs (α-CyD, β-CyD) under different water-dimethyisulfoxide (DMSO) concentration conditions. We found that the CyDs interacting with the boronic acid moiety completely inhibits PET quenching and increases the monomer fluorescence intensity.
由硼酸荧光团（C1-APB）和β-环糊精（β-CyD）组成的包合物作为一种超分子糖传感器，其响应机制基于从激发芘到硼酸的光诱导电子转移（PET）。我们通过在室温下进行时间分辨光致发光（TRPL）测量，研究了C1-APB/CyD复合物中的PET过程，并成功估计出电子转移时间约为1纳秒。我们还通过比较两种环糊精（α-CyD、β-CyD）在不同水-二甲基亚砜（DMSO）浓度条件下对PET过程的影响。我们发现，与硼酸部分相互作用的环糊精完全抑制了PET猝灭，并增加了单体荧光强度。
