...
  • 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, C. Nanomaterials and interfaces >The Ultrafast Temporal and Spectral Characterization of Electron Injection from Perylene Derivatives into ZnO and TiO2 Colloidal Films
【24h】

The Ultrafast Temporal and Spectral Characterization of Electron Injection from Perylene Derivatives into ZnO and TiO2 Colloidal Films

机译：Per衍生物向ZnO和TiO2胶体膜中注入电子的超快时间和光谱表征

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 ultrafast injection dynamics, early recombination dynamics, and spectral signatures of four systematically varied dye-metal oxide hybrid systems were investigated using transient absorption spectroscopy techniques. First, photoinduced electron transfer from two different perylene derivatives into zinc oxide (ZnO) colloidal films is reported. Here, the electronic coupling of the perylene chromophore 2,5-Di-tert-butyl-perylene-9-yl-propionic acid (1) to the ZnO colloids was weaker than the electronic coupling of the chromophore 2,5-Di-tert-butyl-perylene-9-yl-acrylic acid (2). Second, the photoinduced electron transfer of the same two molecules attached to T1O2 colloids was measured and compared to the results for the ZnO colloids using the same techniques. The temporal traces at both the excited-state and the cationic state of the chromophores attached to the semiconductor surfaces were measured simultaneously and showed very good agreement, which indicated a direct injection into the semiconductor. The overall injection times for the ZnO samples was as short as 190 fs, which suggested a strong electronic coupling element for these systems. This injection time is short compared to reports on similar ZnO hybrid systems, but it is still longer than the injection times reported for the TiO2 hybrid systems. The transient absorption spectra of molecule 2 attached to TiO2 showed a large negative signal at 530-550 nm, which indicated the presence of a direct charge transfer state contribution in this system.
机译：使用瞬态吸收光谱技术研究了四个系统变化的染料-金属氧化物杂化系统的超快注入动力学，早期重组动力学和光谱特征。首先，报道了从两种不同的ylene衍生物到氧化锌（ZnO）胶体膜的光诱导电子转移。在此，per发色团2,5-二叔丁基-per-9-基丙酸（1）与ZnO胶体的电子耦合比发色团2,5-二叔胺的电子耦合弱。 -丁基-per-9-丙烯酸（2）。第二，测量与T1O2胶体连接的相同两个分子的光诱导电子转移，并使用相同技术将其与ZnO胶体的结果进行比较。同时测量了附着在半导体表面的生色团在激发态和阳离子态的时间迹线，并显示出非常好的一致性，这表明直接注入半导体中。 ZnO样品的总注入时间短至190 fs，这表明这些系统具有强大的电子耦合元件。与类似的ZnO杂化系统的报告时间相比，该注入时间短，但仍比TiO2杂化系统的报告时间长。附着在TiO2上的分子2的瞬态吸收光谱在530-550 nm处显示出较大的负信号，表明该系统中存在直接电荷转移状态。

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