Ultrafast UV photon echo peak shift and fluorescence up conversion studies of non-polar solvation dynamics
Ultrafast UV photon echo peak shift and fluorescence up conversion studies of non-polar solvation dynamics
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DOI：
10.1016/j.chemphys.2008.01.029
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发表时间：
2008-06-23
期刊：
影响因子：
2.3
通讯作者：
Chergui, M.
中科院分区：
文献类型：
--
作者：
Ajdarzadeh Oskouei, A.;Braem, O.;Chergui, M.
我们目前的光子回波峰位移和飞秒荧光上转换研究的非极性溶剂化动力学的一个简单的非极性染料p-三联苯在乙醇和环己烷中，使用在290 nm的紫外范围内的激发。紫外荧光上转换实验结合了多色检测和结果突出了这种方法的高灵敏度，充分表征染料的激发态动力学。我们还证明了紫外光子回波和瞬态光栅的可行性和非极性溶剂化动力学检测的灵敏度，通过测量染料在基态的频率相关函数。虽然在乙醇中观察到的皮秒制度的溶剂化动力学，电子相干退相发生在时间尺度上快于100 fs的乙醇以及在非极性溶剂环己烷。(C)2008 Elsevier B. V.保留所有权利。
We present photon echo peak shift and femtosecond fluorescence up-conversion studies of non-polar solvation dynamics of a simple non-polar dye p-terphenyl in ethanol and cyclohexane, using excitation in the UV range at 290 nm. The UV fluorescence up-conversion experiments were combined with a polychromatic detection and the results highlight the high sensitivity of this approach to fully characterize the excited state dynamics of the dye. We also demonstrate the feasibility of UV photon echo and transient grating and its sensitivity for the detection of non-polar solvation dynamics by measuring the frequency correlation function of the dye in the ground state. While solvation dynamics in the picosecond regime is observed in ethanol, electronic coherence dephasing occurs on timescales faster than 100 fs in ethanol as well as in the non-polar solvent cyclohexane. (C) 2008 Elsevier B.V. All rights reserved.