Authors
Wen-Bo Zhu, Zhi-Jun Li, Xiao-Wei Zhang, Ying-Ying Li, Hui Wen, Liang Zhang
Published in
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. Volume 367. Issue Pt 1. Pages 128953. Oct 10, 2026. Epub Oct 10, 2026.
Abstract
It is essential to develop a simple method for detecting formaldehyde (FA) because of its harmful effects on human health. Herein, we present a novel metal-coordinated supramolecular polymer chemosensor utilizing a complex between the tetraphenylethylene (TPE) derivative (T4J) and Cu2+ for FA detection in both gaseous and aqueous phases. In this system, Cu(NO3)2 acts as both a linker and a promoter, enabling selective FA detection by T4J-Cu through an aggregation-induced emission (AIE) mechanism. This configuration affords a clear fluorescence turn-on response that can be recognized by the naked eye with a calculated limit of detection (LOD) of 17.5 nM. A practical FA detection kit was fabricated by immobilizing T4J-Cu onto test paper substrates, allowing field-deployable analysis of FA-contaminated environments with preserved sensitivity. Meanwhile, at the same concentration, T4J-Cu exhibited high adsorption efficiencies for 1 × 10-2 and 1 × 10-3 M FA, achieving 85% and 88%, respectively, making it a candidate adsorbent for FA. The proposed metal-coordinated supramolecular polymer strategy, coupled with Cu2+-accelerated hydrazone formation and the reaction-triggered AIE luminescence enhancement, establishes a novel paradigm for FA sensing. This methodology exhibits significant potential for expansion to diverse volatile organic compound (VOC) monitoring applications, particularly in scenarios requiring rapid on-site detection capabilities.
PMID:
42893672
Bibliographic data and abstract were imported from PubMed on 19 Oct 2026.
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