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芳香烃的荧光可以被电子给体如叔胺化合物淬灭,这一现象早为人们所熟知.随着芳烃分子荧光的淬灭出现一个向红移无结构的新荧光峰,它被认为是激发态芳香烃分子A与电子给体D相互作用形成的激基复合物(exciplex)DA所发射的荧光.将两个、三个或更多个发色基团用非共轭链连接起来,受光激发后则可以形成分子内激基复合物.通过这些体系我们可以研究电子给体和电子受体相互作用的机制,研究在复杂的氧化、还原体系(如光合作用)
It is well known that the fluorescence of aromatic hydrocarbons can be quenched by electron donors, such as tertiary amine compounds.With the quenching of aromatics, a new fluorescence peak with no redshift structure appears and is believed to be excited Fluorescence emitted by an exciplex DA formed by the interaction of an aromatic hydrocarbon molecule A with an electron donor D. Two, three or more chromophore groups are linked by unconjugated chains, exposed to light After excitation, it can form an intramolecular exciplex. Through these systems we can study the mechanism of interaction between electron donors and electron acceptors and study the mechanism of complex oxidation and reduction (such as photosynthesis)