Pyrene-attached new Schiff base polymer: ACQ to AIE conversion and its prospects

[Display omitted] •A new water-soluble Schiff base polymer (PPEI) has been successfully synthesized.•The synthesized PPEI converts the ACQ-type pyrene to prosperous AIE type one.•The AIE of PPEI has been understood through computational analysis.•PPEI shows very high sensitivity towards pH.•A reusab...

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Bibliographic Details
Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2025-03, Vol.329, Article 125551
Main Authors: Biswas, Debrupa, Chowdhury, Pranesh, Bar, Nandagopal, Das, Gourab Kanti
Format: Article
Language:English
Subjects:
ACQ
AIE
Polyethyleneimine
Pyrene
Schiff base polymer
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Summary:[Display omitted] •A new water-soluble Schiff base polymer (PPEI) has been successfully synthesized.•The synthesized PPEI converts the ACQ-type pyrene to prosperous AIE type one.•The AIE of PPEI has been understood through computational analysis.•PPEI shows very high sensitivity towards pH.•A reusable kit, a fluorescent logic gate, and a pH sensor have been developed. Schiff base polymer (SBP) is a new research field and an excellent candidate for real-life applications such as photoresistors, fluorescent chemical sensing kits, electrochromic devices, flame-retarders, and electrochemical substances. The dye-containing SBP (DSBP) advances the material further. Herein, the quality of pyrene dye has been improved through its chemical attachment to polyethyleneimine by a facile Schiff base reaction. The new Schiff base polymer (SBP) converts water-insoluble aggregation-causing quenched (ACQ) dye into a highly water-soluble aggregation-induced emissive (AIE) dye. The computational analysis (geometry optimization, FMO analysis, MEP, etc.) elucidates the nature of aggregation (H, J, X, etc.) and its impact on AIE properties. The AIE system is suitable for fabricating a pH sensor, a fluorescence logic gate, and a reusable chemical sensing kit.
ISSN:1386-1425
DOI:10.1016/j.saa.2024.125551