Diffusion-limited exciton fusion reaction in one-dimensional tetramethylammonium manganese trichloride (TMMC).
Diffusion-limited exciton fusion reaction in one-dimensional tetramethylammonium manganese trichloride (TMMC).
复制标题
一维四甲基铵三氯化锰 (TMMC) 中的扩散限制激子聚变反应。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
Sprik
中科院分区：
文献类型：
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作者：
Kroon;Fleurent;Sprik
我们目前的实验研究结果的一维扩散反应系统的反应动力学，在皮秒到毫秒的时间尺度。四甲基锰铵（TMMC）是研究这一问题的理想模型体系。TMMC的时间分辨发光已经测量了超过90年的时间。发光衰减曲线的非指数形状强烈依赖于激发激光功率。这表明是由融合反应（A + Aensurmath {
其中，对于初始激子密度2ifmmode，扩散限制单物种融合模型可以很好地描述光生激子之间的相互作用 伊梅塞尔 exttimesfi {}${10}^{mathrm {ensuremath {-}} 3}$（站点数量的分数）。在较高的初始激子密度的扩散过程，从而反应速率，是显着的影响，在融合反应中产生的热量。这得到了Monte Carlo模拟的支持。
We present results of an experimental study on the reaction kinetics of a one-dimensional diffusion-reaction system, on a picosecond to millisecond time scale. Tetramethylammonium manganese trichloride (TMMC) is a perfect model system to study this problem. Time-resolved luminescence of TMMC has been measured over nine decades in time. The nonexponential shape of the luminescence decay curves depends strongly on exciting laser power. This is shown to result from a fusion reaction (A+Aensuremath{
ightarrow}A) between photogenerated excitons, which is very well described by the diffusion-limited single-species fusion model for initial exciton densities 2ifmmode imeselse exttimesfi{}${10}^{mathrm{ensuremath{-}}3}$ (fraction of the number of sites). At higher initial exciton densities the diffusion process, and thus the reaction rate, is significantly influenced by the heat produced in the fusion reaction. This is supported by Monte Carlo simulations.