Up-converted emission in a series of phenylazomethine dendrimers with a porphyrin core.
Up-converted emission in a series of phenylazomethine dendrimers with a porphyrin core.
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DOI：
10.1021/jp044105q
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发表时间：
2005-04
期刊：
影响因子：
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通讯作者：
Xingzhong Yan;T. Goodson;T. Imaoka;Kimihisa Yamamoto
中科院分区：
文献类型：
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作者：
Xingzhong Yan;T. Goodson;T. Imaoka;Kimihisa Yamamoto
报道了一系列苯基偶氮甲亚胺卟啉树枝状大分子的非线性光学和时间分辨性质。线性光学性质也进行了研究，并获得的能量转移过程的效率。测量也进行了基本的积木分子。在这些卟啉树枝状大分子中观察到了频率上转换发射过程。这种效应的机制进行了研究，并涉及到在苯基甲亚胺卟啉系统中的“热带”吸收过程。时间分辨的测量也表明有效的分子内振动能量在这些系统中的重新分配。这些性质表明，卟啉树枝状聚合物也可能在低频光子的光捕获以及传感器中具有应用。
The nonlinear optical and time-resolved properties of a series of phenylazomethine-porphyrin dendrimers are reported. The linear optical properties were also investigated, and the efficiency of the energy transfer process was obtained. Measurements were also carried out with the basic building-block molecules. The process of frequency up-converted emission was observed in these porphyrin dendrimers. The mechanism for this effect is investigated and related to the process of "hot-band" absorption in the phenylazomethine-porphyrin system. Time-resolved measurements also suggested efficient intramolecular vibrational energy redistribution in these systems. These properties suggest that the porphyrin dendrimers may also have applications in light harvesting of low-frequency photons, as well as in sensors.