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首页> 外文期刊>Chemical Physics Letters >On the photo-stability of single molecules. Dibenzoterrylene in 2,3-dimethylnaphthalene crystals
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On the photo-stability of single molecules. Dibenzoterrylene in 2,3-dimethylnaphthalene crystals

机译:关于单分子的光稳定性。 2,3-二甲基萘晶体中的二苯并ter

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摘要

Fluorescence intensity traces of single dibenzoterrylene molecules in 2,3-dimethylnaphthalene crystals were studied at 270 K. It was found that these molecules are considerably more photo-stable than those of terrylene in the same crystal. Quantum-chemical calculations indicated that the creation of the reactive singlet oxygen state via the triplet state is not probable for dibenzoterrylene, in contrast to terrylene. This reaction provides the first step in typical hydrocarbon oxidation. Therefore, the lack of the triplet channel in the case of dibenzoterrylene, and its domination in the photo-oxidation of terrylene, may explain the different photo-stability of the two compounds.
机译:研究了2,3-二甲基萘晶体中单个二苯并三甲苯分子在270 K下的荧光强度。发现,在同一晶体中,这些分子比三甲苯中的分子具有更高的光稳定性。量子化学计算表明,与三甲苯基相比,二苯并三甲苯不可能通过三重态形成反应性单线态氧态。该反应提供了典型的烃氧化的第一步。因此,在二苯并三甲苯中缺少三重态通道,并且在三甲苯的光氧化中起主导作用,这可以解释两种化合物的不同光稳定性。

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