title: Effects of cyclodextrins on intramolecular photoinduced electron transfer in a boronic acid fluorophore.
abstract: 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.
authors.affiliation: Department of Engineering and Applied Science, Faculty of Science and Technology, Sophia University.
authors.forename: Hiroya
authors.initials: H
authors.lastname: Kano
authors.forename: Daichi
authors.initials: D
authors.lastname: Tanoue
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Shimaoka
authors.forename: Kohei
authors.initials: K
authors.lastname: Katano
authors.forename: Takeshi
authors.initials: T
authors.lastname: Hashimoto
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Kunugita
authors.forename: Shinkoh
authors.initials: S
authors.lastname: Nanbu
authors.forename: Takashi
authors.initials: T
authors.lastname: Hayashita
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Ema
mesh_terms: D001897:Boronic Acids / Q000737:chemistry*; D003505:Cyclodextrins / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D001897:Boronic Acids; D003505:Cyclodextrins; D005456:Fluorescent Dyes