Ultrafast relaxation dynamics of ionic liquids using solvated electrons as a probe

使用溶剂化电子作为探针的离子液体的超快弛豫动力学

基本信息

项目摘要

In this project the ultrafast relaxation dynamics of ionic liquids will be investigated upon photolytic generation of solvated electrons. Experimental techniques such as femtosecond pump-probe absorption and polarization-sensitive spectroscopy with a time resolution of ¿ 100fs will be used to study fundamental inter- and intramolecular interactions in these liquids. As a spectroscopic probe solvated electrons will be generated photolytically and the subsequent relaxation processes will be monitored. While transient absorption techniques can identify and characterize the optical response of solvated electrons in such liquids, polarization-dependent spectroscopy will direct the focus towards structural and electronic properties. For example, two- and three-pulse sequences will allow for a characterization of the formation, recombination and relaxation steps of solvated electrons using time-resolved absorption spectroscopy. On the other hand, transient anisotropy as a polarization-sensitive tool explores the time-dependent orientational changes of solvated electrons in ionic liquids. The results of these studies can be compared to the ultrafast dynamics of solvated electrons in high-temperature ionic liquids where Coulombic interactions in combination with diffusive ionic motions determine the ultrafast response. As a result, this study will provide a more profound understanding of the underlying photo-chemical and photo-physical processes in ionic liquids.
本计画将研究离子液体在光解产生溶剂化电子后的超快弛豫动力学。实验技术,如飞秒泵浦-探测吸收和偏振敏感光谱与时间分辨率为<$100 fs将用于研究基本的分子间和分子内的相互作用,在这些液体。作为光谱探针,溶剂化电子将产生光解和随后的弛豫过程将被监测。虽然瞬态吸收技术可以识别和表征这种液体中溶剂化电子的光学响应,但偏振相关光谱将把重点放在结构和电子特性上。例如,两个和三个脉冲序列将允许使用时间分辨吸收光谱表征溶剂化电子的形成、重组和弛豫步骤。另一方面,瞬态各向异性作为一种极化敏感的工具,探讨了离子液体中溶剂化电子的取向随时间的变化。这些研究的结果可以比较的超快动力学的溶剂化电子在高温离子液体中的库仑相互作用结合扩散离子运动确定的超快响应。因此,这项研究将提供一个更深刻的理解在离子液体中的光化学和光物理过程。

项目成果

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Professor Dr. Andreas-Neil Unterreiner其他文献

Professor Dr. Andreas-Neil Unterreiner的其他文献

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{{ truncateString('Professor Dr. Andreas-Neil Unterreiner', 18)}}的其他基金

Untersuchungen zur Femtosekunden-Dynamik von Exzeßelektronen in Alkalimetall-Alkalihalogenidschmelzen
碱金属-碱卤化物熔体中多余电子的飞秒动力学研究
  • 批准号:
    5424297
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Ultraschnelle, nichtlinear-optische Spektroskopie und Kopplung an rastermikroskopische Verfahren
超快、非线性光谱学以及与扫描显微方法的耦合
  • 批准号:
    5178754
  • 财政年份:
    1999
  • 资助金额:
    --
  • 项目类别:
    Research Fellowships

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Theoretical investigation on ultrafast electronic relaxation dynamics in transition metal complexes
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    17K05747
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    2017
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    Grant-in-Aid for Scientific Research (C)
Ultrafast dynamics in enzyme catalysis
酶催化中的超快动力学
  • 批准号:
    9142918
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    2016
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    --
  • 项目类别:
Biomolecular folding by ultrafast spectroscopy and high performance computing
通过超快光谱和高性能计算进行生物分子折叠
  • 批准号:
    7409385
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    2008
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Ultrafast lattice relaxation dynamics of photo-excited states in halogen-bridged mixed valence metal complexes
卤素桥联混合价金属配合物中光激发态的超快晶格弛豫动力学
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    16540297
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    2004
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    --
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    Grant-in-Aid for Scientific Research (C)
Wavepacket dynamics of ultrafast reactions with relaxation
弛豫超快反应的波包动力学
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    14340174
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    2002
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    --
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    Grant-in-Aid for Scientific Research (B)
Investigation of an ultrafast all optical modulation device using three levels in a GaN/AlGaN quantum well
研究在 GaN/AlGaN 量子阱中使用三能级的超快全光调制器件
  • 批准号:
    11555014
  • 财政年份:
    1999
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    Grant-in-Aid for Scientific Research (B)
Ultrafast Spectroscopic Study of Photochemical Dynamics in Solution and Microscopic Environments
溶液和微观环境中光化学动力学的超快光谱研究
  • 批准号:
    11640521
  • 财政年份:
    1999
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    --
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    Grant-in-Aid for Scientific Research (C)
Evaluation of Ultrafast Intramolecular Electron Transfer Rate by Means of NMR Relaxation
通过核磁共振弛豫评估超快分子内电子转移速率
  • 批准号:
    08454235
  • 财政年份:
    1996
  • 资助金额:
    --
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    Grant-in-Aid for Scientific Research (B)
Study of ultrafast relaxation dynamics of localized center in solids by femtosecond Raman spectroscopy
飞秒拉曼光谱研究固体局域中心超快弛豫动力学
  • 批准号:
    03452037
  • 财政年份:
    1991
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