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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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High-Fidelity Supramolecular Chirality Transportation Enabled Through Chalcogen Bonding
Zhuoer Wang1, 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, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|October 22, 2024
Summary
Researchers developed artificial chiral materials using chalcogen bonding to precisely control supramolecular chirality. This method enables the fabrication of advanced chiroptical materials with tunable properties and helical structures.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Organic Chemistry
Background:
- Protein folding demonstrates precise chirality transfer via weak bonds, inspiring artificial chiral material design.
- Chirality in materials is crucial for applications in optics, electronics, and sensing.
Purpose of the Study:
- To report chalcogen bonding-directed supramolecular chirality transfer for fabricating advanced chiroptical materials.
- To achieve high-fidelity control over chirality and macroscopic helical sense in artificial systems.
Main Methods:
- Conjugating benzochalcogenadiazole (O, S, Se) motifs to amino acid residues.
- Utilizing chalcogen bonding and hydrogen bonding for coassembly with pyrene-conjugated aryl carboxylic acids.
- Employing chiral benzochalcogenadiazole motifs as seeds for symmetry breaking in benzamide systems.
Main Results:
- Selective supramolecular chirality with handedness dependent on chalcogen type and amino acid.
- Formation of macroscopic helical structures with active circular dichroism and circularly polarized luminescence.
- Fabrication of a thermal chiroptical switch with color-tunable phosphorescent circularly polarized luminescence.
Conclusions:
- Benzochalcogenadiazole-based chiral building units enable precise supramolecular chirality transfer.
- Coassembly strategies allow for high-fidelity manipulation of chiroptical properties.
- This work provides a versatile platform for designing advanced chiral functional materials.
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