Characterizing the functional dynamics of zinc phthalocyanine from femtoseconds to nanoseconds
Characterizing the functional dynamics of zinc phthalocyanine from femtoseconds to nanoseconds
复制标题
DOI：
10.1016/j.jphotochem.2007.11.018
复制
发表时间：
2008-04-30
影响因子：
4.3
通讯作者：
Herek, Jennifer L.
中科院分区：
文献类型：
--
作者：
Savolainen, Janne;van der Linden, Dennis;Herek, Jennifer L.
利用稳态和时间分辨泵浦-探针光谱研究了一种很有前途的光敏剂酞菁锌。光谱分辨的泵浦探测数据记录在时间尺度上，范围从飞秒到纳秒。全局分析得到了激发态吸收光谱和寿命，以及从初始激发S-1态开始的竞争弛豫过程的路径和效率。除了预期的纳秒级荧光过程，内部转换和系统间交叉遵循普遍接受的动力学方案，我们还解决了超快动力学。讨论了这些快速过程的性质及其对涉及三重态形成的功能途径的影响。(c) 2007 Elsevier B.V.版权所有
A promising photosensitizer, zinc phthalocyanine, is investigated by means of steady-state and time-resolved pump-probe spectroscopies. Spectrally resolved pump-probe data are recorded on time scales ranging from femtoseconds to nanoseconds. Global analysis yields the excited-state absorption spectra and lifetimes, as well as the pathways and efficiencies of the competing relaxation processes from the initially excited S-1 state. In addition to the expected nanosecond-scale processes of fluorescence, internal conversion and inter-system crossing that follow the generally accepted kinetic scheme, we also resolve ultrafast dynamics. The nature of these fast processes and their implications to the functional pathway involving triplet formation are discussed. (c) 2007 Elsevier B.V. All rights reserved.