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Updated: Jan 15, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
π-hole forces enabled programmable supramolecular chirality based on a chiral benzimidazole pincer
Weilong Ma1, Aiyou Hao1, Pengyao Xing1
1Key Laboratory of Colloid and Interface Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 People's Republic of China haoay@sdu.edu.cn xingpengyao@sdu.edu.cn.
Researchers developed a new method for creating chiral materials using π-hole interactions and hydrogen bonding. This hierarchical self-assembly process allows for tunable supramolecular chirality and the fabrication of complex nanostructures.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Organic Chemistry
Background:
- Controlling chirality in self-assembled materials is crucial for advanced applications.
- Hierarchical assembly offers a pathway to complex nanostructures with tunable properties.
Purpose of the Study:
- To develop a programmed hierarchical chiral assembly strategy.
- To investigate the role of π-hole interactions and hydrogen bonding in chiral self-assembly.
- To create tunable chiroptical materials.
Main Methods:
- Utilized a chiral molecular pincer with benzimidazole and cholesteryl moieties.
- Coassembled with various achiral organic acids (aliphatic, aromatic, polymeric).
- Incorporated fluorinated or chlorinated components to introduce π-hole forces.
Main Results:
- Achieved one-dimensional helical superstructures with enhanced supramolecular chirality and chiroptical activity.
- Demonstrated substrate-dependent induction of chirality with diverse acids.
- Successfully modulated macroscopic chirality and created tunable chiral microarchitectures.
Conclusions:
- Established a modular platform for high-throughput fabrication of chiroptical materials.
- Showcased the potential of π-hole interactions in hierarchical self-assembly for soft materials.
- Provided insights into rational design of functional chiral soft materials.
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