• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Exciton-Vibrational Couplings in Homo- and Heterodimer Stacks of Perylene Bisimide Dyes within Cyclophanes: Studies on Absorption Properties and Theoretical Analysis
【24h】

Exciton-Vibrational Couplings in Homo- and Heterodimer Stacks of Perylene Bisimide Dyes within Cyclophanes: Studies on Absorption Properties and Theoretical Analysis

机译：环芳烃中Bi双酰亚胺染料的同-二元和异二聚物堆栈中的激子-振动耦合：吸收性质和理论分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The optical properties of a series of three cyclophanes comprising either identical or different perylene bisimide (PBI) chromophores were studied by UV/Vis absorption spectroscopy and their distinctive spectral features were analyzed. All the investigated cyclophanes show significantly different absorption features with respect to the corresponding constituent PBI monomers indicating strong coupling interactions between the PBI units within the cyclophanes. DFT calculations suggest a pi-stacked arrangement of the PBI units at close van der Waals distance in the cyclophanes with rotational displacement. Simulations of the absorption spectra based on time-dependent quantum mechanics properly reproduced the experimental spectra, revealing excitonvibrational coupling between the chromophores both in homo-and heterodimer stacks. The PBI cyclophane comprising two different PBI chromophores represents the first example of a PBI heterodimer stack for which the exciton coupling has been investigated. The quantum dynamics analysis reveals that exciton coupling in heteroaggregates is indeed of similar strength as for homoaggregates.
机译：通过紫外/可见吸收光谱研究了包含相同或不同的per双酰亚胺（PBI）发色团的一系列三个环烷的光学性质，并分析了其独特的光谱特征。关于相应的组成PBI单体，所有研究的环烷均显示出显着不同的吸收特征，表明环烷内的PBI单元之间存在强的偶联相互作用。 DFT计算表明，PBI单元在piphan堆叠结构中具有旋转位移，且在环行管中的范德华距离很近。基于随时间变化的量子力学的吸收光谱的模拟正确地再现了实验光谱，揭示了均二聚体和异二聚体堆叠中生色团之间的激振振动耦合。包含两个不同的PBI生色团的PBI环烷代表了已经研究了激子偶联的PBI异二聚体堆叠的第一个例子。量子动力学分析表明，杂聚集体中的激子耦合确实具有与均聚集体相似的强度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号