...
  • 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 >Double-Channel Photoionization Followed by Geminate Charge Recombination/Separation
【24h】

Double-Channel Photoionization Followed by Geminate Charge Recombination/Separation

机译：双通道光电离，然后进行双电荷重组/分离

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 photoionization of perylene by tetracyanoethylene (TCNE) in liquid solutions is reconsidered within the corrected energy scheme for a double channel electron transfer: to the ground and excited states of the produced ion pair. The complex space dependence of a total (double channel) rate of multiphonon transfer is specified and compared to the recently proposed monoexponential model. The fitting of the forward electron transfer (ionization) is essentially improved, and the real electron coupling and tunneling parameters are firmly established. The same has been done for the geminate recombination/separation kinetics, accounting theoretically for the hot recombination experienced by 2/3 of the initially produced ion pairs. Only 1/3 of them is left for subsequent thermal recombination and even less are left for their separation into free ions. The yields of the latter, strongly dependent on the initial concentration of TCNE, are brought into reasonable coincidence with the theoretical predictions by a renormalization of the empirically calibrated ion densities especially at largeconcentrations. Altogether, this is a precedent spin-less reatment of photoionization well-fitted to the experimental data at all times (from the excitation until charge separation), with a single set of varying parameters.
机译：在校正后的能量方案中，考虑到双氰胺在液态溶液中通过四氰基乙烯（TCNE）进行的光电离电离，以实现双通道电子转移：生成离子对的基态和激发态。指定了多声子转移的总（双通道）速率的复杂空间依赖性，并将其与最近提出的单指数模型进行比较。向前电子转移（电离）的拟合得到了实质性改善，并且牢固地建立了真实的电子耦合和隧穿参数。理论上考虑了初始产生的离子对的2/3所经历的热重组，因此对geminate重组/分离动力学进行了相同的处理。仅剩下其中的1/3可以用于后续的热重组，而剩下的更少的则可以将其分离成自由离子。后者的产量在很大程度上取决于TCNE的初始浓度，尤其是在大浓度时，通过对经验校准的离子密度进行重新归一化，可以使其与理论预测合理地吻合。总而言之，这是一个在任何时候（从激发到电荷分离）都非常适合实验数据的无电离光离子化的先例，它只有一组不同的参数。

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