1. Two Photon Absorption Study of Low-Bandgap, Fully Conjugated Perylene Diimide-Thienoacene-Perylene Diimide Ladder-Type Molecules
- Author
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Audrey Eshun, Ricardo J. Vazquez, Neranga Abeyasinghe, Theodore Goodson, Zhengxu Cai, Na Zhang, Wai-Yip Lo, Qinghe Wu, Luping Yu, Donglin Zhao, Bradley Keller, Lianwei Li, and Halley Banaszak-Holl
- Subjects
General Chemical Engineering ,02 engineering and technology ,General Chemistry ,Conjugated system ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,Two-photon absorption ,0104 chemical sciences ,Scholl reaction ,chemistry.chemical_compound ,chemistry ,Diimide ,Intramolecular force ,Materials Chemistry ,Molecule ,Absorption (chemistry) ,0210 nano-technology ,Perylene - Abstract
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.
- Published
- 2017