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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Ultrafast Energy Relaxation Dynamics of C_(120), a [2 + 2]-bridged C_(60) Dimer
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Ultrafast Energy Relaxation Dynamics of C_(120), a [2 + 2]-bridged C_(60) Dimer

机译：C_（120），[2 + 2]桥联的C_（60）二聚体的超快能量弛豫动力学

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摘要

The energy relaxation dynamics of the photoexcited [2 + 2]-bridged C_(60) dimer in o-dichlorobenzene has been investigated by the time-resolved fluorescence and transient absorption techniques. The absorption and fluorescence spectra of the C_(60) dimer show that the monomeric moieties of C_(60) are only weakly interacting with each other, indicating that the C_(60) dimer can be considered as a nearly decoupled bichromophoric molecular system in the ground state. The lowest emitting state of the C_(60) dimer is formed with ～60-ps time constant, while its fluorescence decays nearly as fast (～1.22 ns) as in the C_(60) monomer (～1.17 ns). The 60-ps decay component was suggested to be due to a transition from an optically nonemissive state to an emissive state in the C_(60) dimer. It was also found that the overall photophysical properties of the C_(60) dimer have mush more to do with the disruption of the π-bond system than any bichromophoric interaction between the individual C_(60) units.
机译：通过时间分辨荧光和瞬态吸收技术研究了光激发的[2 + 2]桥联的C_（60）二聚体在邻二氯苯中的能量弛豫动力学。 C_（60）二聚体的吸收和荧光光谱表明，C_（60）的单体部分彼此之间仅弱相互作用，表明C_（60）二聚体可被认为是分子中几乎解耦的双发色分子系统。基态。 C_（60）二聚体的最低发射态以〜60ps的时间常数形成，而其荧光衰减几乎与C_（60）单体（〜1.17 ns）一样快（〜1.22 ns）。 60 ps衰减分量被认为是由于C_（60）二聚体中从光学非发射态到发射态的转变所致。还发现，C_（60）二聚体的整体光物理性质与单个C_（60）单元之间的任何双发色相互作用相比，更多地与π键系统的破坏有关。

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