Two Photon Absorption Study of Low-Bandgap, Fully Conjugated Perylene Diimide-Thienoacene-Perylene Diimide Ladder-Type Molecules

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 molecul...

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Bibliographic Details
Published in:Chemistry of materials 2017-08, Vol.29 (16), p.6726-6732
Main Authors: Cai, Zhengxu, Vázquez, Ricardo J, Zhao, Donglin, Li, Lianwei, Lo, Wai-yip, Zhang, Na, Wu, Qinghe, Keller, Bradley, Eshun, Audrey, Abeyasinghe, Neranga, Banaszak-Holl, Halley, Goodson, Theodore, Yu, Luping
Format: Article
Language:English
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Summary: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.
ISSN:0897-4756
1520-5002
DOI:10.1021/acs.chemmater.7b01512