论文
Discrete π-Stacks from Self-Assembled Perylenediimide Analogues
- 发布时间：2021-03-15
- 点击次数：
- 关键字：Dimers;Aggregates - Chirality - Ions - Light scattering - Nuclear magnetic resonance spectroscopy - Self assembly - Single crystals - Stereochemistry - Supramolecular chemistry
- 摘要：The formation of well-defined finite-sized aggregates represents an attractive goal in supramolecular chemistry. In particular, construction of discrete π-stacked dye assemblies remains a challenge. Reported here is the design and synthesis of a novel type of discrete π-stacked aggregate from two comparable perylenediimide (PDI) dyads (PEP and PBP). The criss-cross PEP-PBP dimers in solution and (PBP-PEP)-(PEP-PBP) tetramers in the solid state are well elucidated using single-crystal X-ray diffraction, dynamic light scattering, and diffusion-ordered NMR spectroscopy. Extensive π–π stacking between the PDI units of PEP and PBP as well as repulsive interactions of swallow-tailed alkyl substituents are responsible for the selective formation of discrete dimer and tetramer stacks. Our results reveal a new approach to preparing discrete π stacks that are appealing for making assemblies with well-defined optoelectronic properties.<br/> © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
- 卷号：58
- 期号：43
- 是否译文：否