Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 46, Pages 24543-24548Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107893
Keywords
conjugation; cycloparaphenylenes; macrocycles; nanopillar molecules; naphthodithiophene diimide
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Funding
- National Natural Science Foundation of China [22071208, 21772165, 21772162]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521004]
- Youth Innovation foundation of Xiamen [3502Z20206058]
- Fund for Scientific Research (F.R.S.-FNRS) [4532.16, 30650939]
- Swedish e-Science Research Center (SeRC)
- Swedish Research Council [2018-4343]
- European Commission [765739]
- Swedish National Infrastructure for Computing (SNIC)
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The synthesis, structures, and properties of [4]cyclonaphthodithiophene diimides ([4]C-NDTIs) are described. These compounds exhibit near-infrared light absorptions, strong excitonic coupling, and tight encapsulation of C-60. The stable orientations of NDTI units in the nanopillars enable detailed circular dichroism studies and mimic natural photosynthetic systems.
The synthesis, structures, and properties of [4]cyclonaphthodithiophene diimides ([4]C-NDTIs) are described. NDTIs as important n-type building blocks were catenated in the alpha-positions of thiophene rings via an unusual electrochemical-oxidation-promoted macrocyclization route. The thiophene-thiophene junction in [4]C-NDTIs results in an ideal pillar shape. This interesting topology, along with appealing electronic and optical properties inherited from the NDTI units, endows the [4]C-NDTIs with both near-infrared (NIR) light absorptions, strong excitonic coupling, and tight encapsulation of C-60. Stable orientations of the NDTI units in the nanopillars lead to stable inherent chirality, which enables detailed circular dichroism studies on the impact of isomeric structures on pi-conjugation. Remarkably, the [4]C-NDTIs maintain the strong pi-pi stacking abilities of NDTI units and thus adopt two-dimensional (2D) lattice arrays at the molecular level. These nanopillar molecules have great potential to mimic natural photosynthetic systems for the development of multifunctional organic materials.
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