...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Delocalization of positive charge in π-stacked multi-benzene rings in multilayered cyclophanes
【24h】

Delocalization of positive charge in π-stacked multi-benzene rings in multilayered cyclophanes

机译：多层环烷中π堆积的多苯环中正电荷的离域

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

In the present study, delocalization of a positive charge in π-stacked multi-benzene rings in multilayered para-and meta-cyclophanes, in which benzene rings are connected by propyl chains to form a chromophore array with the face-to-face structure, was investigated by means of transient absorption spectroscopy during the pulse radiolysis using dichloroethane as a solvent. The local excitation and charge resonance (CR) bands were successfully observed. It was revealed that the CR band shifted to the longer wavelength side with the number of the benzene rings. The stabilization energy estimated from the peak position of the CR band showed the efficient charge delocalization over the cyclophanes. Furthermore, the CR bands showed the slight spectral change attributable to the change in distribution of the conformers. The substantially long lifetime of the CR band can be explained on the basis of the smaller charge distribution on the outer layers of the multilayered cyclophanes.
机译：在本研究中，正电荷在多层对-和间-环戊烯的π堆叠多苯环中发生离域化，其中苯环通过丙基链连接，形成具有面对面结构的生色团阵列，在使用二氯乙烷作为溶剂的脉冲辐射分解过程中，通过瞬态吸收光谱法对产物进行了研究。成功地观察到局部激发和电荷共振（CR）带。可以看出，CR带随着苯环的数量向更长的波长侧移动。从CR带的峰值位置估计的稳定能显示出在环烷上有效的电荷离域。此外，CR带显示出轻微的光谱变化，这归因于构象体分布的变化。可以基于多层环烷外层上较小的电荷分布来解释CR带的基本上长的寿命。

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