Cooperative Supramolecular Polymerization of Propeller-Shaped Triphenylamine Cyanostilbenes for Explosive Detection

Self-assembly of π -conjugated compounds into supramolecular polymers has received considerable attention because of their intrinsic scientific interests and technological applications. As compared to π -conjugated rods, discotics, and macrocycles, propeller-shaped π -conjugated molecules have been...

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Bibliographic Details
Published in:Chinese journal of polymer science 2023-04, Vol.41 (4), p.585-592
Main Authors: Guang, Long-Yu, Zhou, Zhi-Feng, Zhang, Yi-Fei, Gao, Lai-Wei, Wang, Feng, Liao, Rui
Format: Article
Language:English
Subjects:
Amplification
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electron transfer
Elongation
Emission
Explosives detection
Feasibility studies
Hydrogen bonds
Industrial Chemistry/Chemical Engineering
Nucleation
Polymer Sciences
Polymerization
Polymers
Research Article
Self-assembly
Supramolecular polymers
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Summary:Self-assembly of π -conjugated compounds into supramolecular polymers has received considerable attention because of their intrinsic scientific interests and technological applications. As compared to π -conjugated rods, discotics, and macrocycles, propeller-shaped π -conjugated molecules have been less exploited to form long-range-ordered supramolecular polymers. Herein a novel type of supramolecular polymers has been constructed on the basis of propeller-shaped triphenylamine cyanostilbenes. The designed compound adopts nucleation—elongation cooperative mechanism for the supramolecular polymerization process, because of the participation of three-fold hydrogen bonds between the neighbouring monomers. The supramolecular polymeric state displays amplified chirality and enhanced emission than those in the monomeric state. The resulting supramolecular polymers exhibit severe emission quenching upon addition of 2,6-dinitrotoluene, ascribed to photoinduced electron transfer from the triphenylamine cyanostilbenes to the explosive analyte. The current study proves the feasibility to supramolecular polymerize propeller-like π -conjugated molecules, serving as a promising type of explosive sensor owing to their guest encapsulation and signal amplification capabilities.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-023-2917-3