C_(60)在室温有机溶剂中荧光的研究

本文在室温下对C60分别在吡啶、甲苯和乙腈中的荧光了研究,实验表明:C60在吡啶中的荧光由以440nm、570nm和700nm为中心的三个荧光带组成;C60在甲苯中的荧光由以430nm和700nm为中心的两个荧光带组成;C60在乙腈中的荧光由以570nm和700nm为中心的两个荧光带组成。经比较分析发现C60-有机溶剂体系700nm区域的荧光带的发射与溶剂的种类无关,而440nm和570nm区域的荧光带及其精细结构可以反映C60与溶剂分子的特殊相互作用。进一步提出C60-吡啶体系以570nm为中心的荧光带是由吡啶分子通过含孤对电子的N与C60形成的电荷转移络合物发出的。

Fluorescence Study of C60 in Organic Solvent at Room Temperature

Fluorescence peaks of C_ 60 in pyridine,toluene and acetonitrile at room temperature are studied in this paper.Three groups of C_ 60 fluorescence peaks centered at 440nm,575nm and 700nm respectively are observed in pyridine;two groups of C_ 60 fluorescence peaks centered at 440nm and 700nm are observed in toluene;and two groups of C_ 60 fluorescence peaks centered at 575nm and 700nm are observed in acetonitrile.Comparing the fluorescence emission of C_ 60 in different solvents,it can be concluded that the emission of fluorescence band centered at 700nm have little dependence on the properties of solvent,while the two higher energy bands indicate the characteristic interaction between C_ 60 and solvent molecule.Meanwhile,we suppose that the fluorescence band of C_ 60-pyridine system centered at 570nm is raised from the C_ 60-pyridine charge-transfer adducts.