Two Photon Absorption Study of Low-Bandgap, Fully Conjugated Perylene Diimide-Thienoacene-Perylene Diimide Ladder-Type Molecules
Two Photon Absorption Study of Low-Bandgap, Fully Conjugated Perylene Diimide-Thienoacene-Perylene Diimide Ladder-Type Molecules
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DOI：
10.1021/acs.chemmater.7b01512
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发表时间：
2017-08-22
影响因子：
8.6
通讯作者：
Yu, Luping
中科院分区：
文献类型：
--
作者：
Cai, Zhengxu;Vazquez, Ricardo J.;Yu, Luping
通过Scholl反应合成了一系列新的给受体梯形分子。这些分子含有多达25个稠环，但仍显示出良好的空气稳定性和良好的溶解性。发现环稠合反应对供体单元中侧链的性质敏感。通过2D NMR和DFT计算研究了分子构象。研究了其物理化学性质，并观察到强烈的分子内电荷转移。所有的分子表现出双光子吸收（TPA）的活动，和他们的TPA截面显示出线性关系增加共轭长度的噻吩并苯-PDI衍生物。
A new series of donor acceptor ladder-type molecules were synthesized via Scholl reaction. These molecules contain up to 25-fused rings but still show good air stability and good solubility. The ring fusing reaction is found to be sensitive to the nature of the side-chain in donor units. The molecular conformations were investigated by 2D NMR and DFT calculations. The photophysical properties were investigated and an intense intramolecular charge-transfer was observed. All of the molecules exhibit two-photon absorption (TPA) activity, and their TPA cross-section shows a linear relationship with increasing conjugation length of the thienoacene-PDI derivatives.