Controlled Supramolecular Self-Assembly Pathways by Intramolecular Rotation of D–A Molecular System toward the Signal Differentiation Detection of Toxic Vapors

Yongxian Guo, Yanjun Gong, Mei Zhao, Jiantao Ping, Juyoung Yoon, Qiongzheng Hu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Revealing the structural evolution mechanisms of supramolecular self-assembly can facilitate the exploitation of new self-assembly pathways and various functional materials. Here, this work reports a unique intramolecular rotation-induced structural evolution of supramolecular assemblies from a metastable state to a thermodynamically stable state using a twisting D–A molecule. These self-assemblies are applied to the signal differentiation detection of toxic dimethylsulfide (DMS) vapors. The F161BT monomer of the inactive state is trapped in off-pathway metastable nanospheres, which can disassemble and induce the transformation of the F161BT monomer into an active state by crossing the energy barrier. Subsequently, the active monomer goes through the processes of nucleation and elongation, forming thermodynamically stable on-pathway microribbons. Adding seeds can accelerate the molecular conformational transformation, generating microribbons with controlled lengths. Opposite fluorescent responses are obtained when exposing the two aggregates to the DMS vapors, allowing the sensitive detection of DMS with enhanced selectivity, which offers tremendous potential in practical applications.

Original languageEnglish
Article number2205044
JournalSmall
Volume19
Issue number1
DOIs
StatePublished - 4 Jan 2023

Bibliographical note

Funding Information:
This work was financially supported by the National Natural Science Foundation of China (Grant No. 22106078, 22006092), Shandong Provincial Natural Science Foundation (No. ZR2021QB031, ZR2021QF058), Taishan Scholars Program of Shandong Province (No. tsqn201812088), and Basic Research Project of Science, Education and Industry Integration Pilot Project of Qilu University of Technology (No. 2022PY017). J. Yoon thanks the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT, No. 2022R1A2C3005420).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • competitive pathways
  • intramolecular rotation
  • metastable aggregates
  • structural evolution
  • vapor sensors

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