Helical Self‐Assembly and Fe3+ Detection of V‐Shaped AIE‐Active Chiral Tetraphenylbutadiene‐Based Polyamides

Chiral aggregation‐induced emission (AIE) molecules have drawn attention for their helical self‐assembly and special optical properties. The helical self‐assembly of AIE‐active chiral non‐linear main‐chain polymers can produce some desired optical features. In this work, a series of V‐shaped chiral...

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Bibliographic Details
Published in:Chemistry : a European journal 2023-08, Vol.29 (46), p.e202301035-n/a
Main Authors: Zhao, Zixuan, Zhang, Lulu, Zhao, Ying, Li, Yanji, Shi, Jianbing, Zhi, Junge, Dong, Yuping
Format: Article
Language:English
Subjects:
aggregation-induced emission
Chains (polymeric)
Chemistry
chiral polyamides
Circular dichroism
Conformation
Dichroism
Fibers
fluorescence probe
helical self-assembly
Helicity
Iron
Molecular conformation
Optical properties
Polyamide resins
Polyamides
Polymers
Self-assembly
tetraphenylbutadiene
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Summary:Chiral aggregation‐induced emission (AIE) molecules have drawn attention for their helical self‐assembly and special optical properties. The helical self‐assembly of AIE‐active chiral non‐linear main‐chain polymers can produce some desired optical features. In this work, a series of V‐shaped chiral AIE‐active polyamides P1‐C3, P1‐C6, P1‐C12 and linear P2‐C3, P2‐C6, bearing n‐propyl/hexyl/dodecyl side‐chains, based on tetraphenylbutadiene (TPB), were prepared. All target main‐chain polymers exhibit distinct AIE characteristics. The polymer P1‐C6 with moderate length alkyl chains shows better AIE properties. The V‐shaped main‐chains and the chiral induction of (1R,2R)‐(+)‐1,2‐cyclohexanediamine in each repeating unit promote the polymer chains display helical conformation, and multiple helical polymer chains induce nano‐fibers helicity when the polymer chains aggregate and self‐assemble in THF/H2O mixtures. Simultaneously, the helical conformation polymer chains and helical nano‐fibers cause P1‐C6 produce strong circular dichroism (CD) signals with positive Cotton effect. Moreover, P1‐C6 could also occur fluorescence quenching response to Fe3+ selectively with a low detection limit of 3.48 μmol/L. A series of V‐shaped tetraphenylbutadiene‐based aggregation‐induced emission‐active chiral polyamides bearing n‐propyl/hexyl/dodecyl side‐chains are reported. They possess AIE features, display helical conformation polymer chains and self‐assemble into helical nano‐fibers, and present enhanced CD signal with positive Cotton effect. And P1‐C6 is a fluorescence probe for Fe3+.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202301035