夫勒烯二氮杂桥衍生物对吡啶荧光猝灭机制以及它的电化学的研究

用荧光光谱研究了富勒烯二氮杂桥衍生物(eddy2)对吡啶荧光的猝灭机制，发现吡啶在426.27 nm处有荧光发射峰，当向吡啶中分别加入C₆₀和eddy2时，原有的发射峰强度明显减弱，且向短波长稍有移位，C₆₀和eddy2对吡啶荧光有猝灭作用。吡啶-C60和吡啶-eddy2体系的猝灭过程是分子之间结合形成了复合物引起的静态猝灭。eddy2对吡啶的离解常数为K_D＝2.28×10-6 (mol·L-1)，结合常数K_S＝4.39×10-5 (L·mol-1)。同时研究了eddy2的电化学行为，发现eddy2的前3个还原峰电位比母体C₆₀的峰电位正移，表明eddy2的电化学还原比C₆₀的电化学还原容易，更容易接收电子。

Study on the Mechanism of Fluorescence Quenching of Pyridine by Bisazafulleroid[60]Derivative and Its Electrochemical Property

The mechanism of the fluorescence quenching of pyridine by bisazafulleroid60] 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.