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Energy transfer enhancement by oxygen perturbation of spin-forbidden electronic transitions in aromatic systems

机译:通过氧扰动芳族体系中自旋禁止的电子跃迁增强能量转移

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摘要

A. Monguzzi;R. Tubino;M. M. Salamone;F. Meinardi;%Triplet-triplet energy transfer in multicomponent organic systems is usually entirely ascribed to a Dexter-type mechanism involving only short-range donor/acceptor interactions. We demonstrate that the presence of molecular oxygen introduces a perturbation to the electronic structure of one of the involved moieties which can induce a large increase in the spin-forbidden transition oscillator strength so that the otherwise negligible Forster contribution dominates the overall energy transfer rate.
机译:A.Monguzzi; R。 Tubino; M。萨拉曼(M. Salamone); F. Meinardi;%Triplet-triplet三元组能量在多组分有机体系中的传递通常完全归因于仅涉及短距离供体/受体相互作用的Dexter型机制。我们证明了分子氧的存在对所涉及部分之一的电子结构引入了扰动,该扰动可引起自旋禁能跃迁振荡器强度的大幅增加,从而使其他方面可忽略不计的福斯特贡献主导了整体能量传递速率。

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