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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Photophysical Studies on Molecular Chirality: Ground and Excited State Enantioselective Interactions between 2-Naphthyl-1-ethanol and Natural Bicyclic Compounds
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Photophysical Studies on Molecular Chirality: Ground and Excited State Enantioselective Interactions between 2-Naphthyl-1-ethanol and Natural Bicyclic Compounds

机译：分子手性的光物理研究：2-萘-1-乙醇与天然双环化合物之间的基态和激发态对映选择性相互作用。

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摘要

Jet-cooled isolated diastereoisomeric pairs formed between R- and S-2-naphthyl-1-ethanol and a series of optically active terpenes have been investigated by studying both the fluorescence excitation spectra and the fluorescence decays. While the homo- and heterochiral complexes with #alpha#-pinene and borneol can be resolved spectrally, no spectral enantiodifferentiation was obtained in the case of camphene and camphor complexes. Chirality-dependent fluorescence decays were however observed for these complexes which exhibit either longer lifetimes than the bare chrompohore for the diasteroisomers involving camphene, or shorter for those with camphor. The enantioselective quenching of fluorescence of 2-naphthylethanol by R-and S-camphor has also been observed in n-hexane solution and has been shown to be due to a singlet-singlet energy transfer taking place at a rate lower than diffusion. In contrast, the energy transfer to R- and S-camphorquinone and biacetyl was shown to be diffusion controlled and nonenantioselective.
机译：通过研究荧光激发光谱和荧光衰减，研究了在R-和S-2-萘-1-乙醇与一系列旋光性萜烯之间形成的射流冷却的分离的非对映异构体对。尽管与＃alpha＃-pine烯和冰片的同手性和杂手性配合物可以通过光谱拆分，但在樟脑和樟脑配合物的情况下，未获得光谱对映差。然而，对于这些配合物，观察到手性依赖的荧光衰减，对于涉及樟脑的非对映异构体，其寿命比裸露的发色团更长，对于樟脑的非对映异构体则更短。还已经在正己烷溶液中观察到通过R和S樟脑对2-萘乙醇荧光的对映选择性猝灭，并且表明这是由于单重态-单重态能量转移的速率低于扩散。相反，向R-和S-樟脑醌和联乙酰的能量转移显示是扩散受控的和非对映选择性的。

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