title: [Study on the mechanism of fluorescence quenching of pyridine by bisazafulleroid[60] derivative and its electrochemical property].
abstract: The mechanism of the fluorescence quenching of pyridine by bisazafulleroid[60] derivative (eddy2) was discussed. When the C60 and eddy2 were added into pyridine respectively, the intensity of 426.27 nm emission peak of pyridine decreased obviously and shifted towards shorter wavelength, a typical quenching phenomenon. The fluorescence quenching of eddy2-pyridine is caused by the static quenching process resulting from the formation of charge-translated complex between molecules. The dissociation constant of eddy2 from pyridine is K(D) = 2.28 x 10(-6) (mol x L(-1)). The combination constant of eddy2 is Ks = 4.39 x 10(-5) (L x mol(-1)). The electrochemical properties of eddy2 were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) on a glassy carbon electrode in a mixed solvent of toluene and acetonitrile. The first three reduction waves for eddy2 shift to more positive than that for C60, indicating the electroreduction of eddy2 is easier than that of C60.
authors.affiliation: The Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China.
authors.forename: Ji-wei
authors.initials: JW
authors.lastname: Hu
authors.forename: Guang-shi
authors.initials: GS
authors.lastname: Tang
authors.forename: Mei-xian
authors.initials: MX
authors.lastname: Li
authors.forename: Ni-juan
authors.initials: NJ
authors.lastname: Sun