Pyrazine-Naphthalene-Based AIE-Active Polymer as a Highly Sensitive Fluorescent Probe for Fe³⁺ Detection

Sai Zhang; Pincheng Wang

doi:10.20944/preprints202512.1330.v1

Submitted:

15 December 2025

Posted:

16 December 2025

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Pyrazine-Naphthalene-Based AIE-Active Polymer as a Highly Sensitive Fluorescent Probe for Fe³⁺ Detection

Sai Zhang^*,&

,Pincheng Wang^&

Sai Zhang^*,&

,Pincheng Wang^&

^& These authors have equal contribution.

Submitted:

15 December 2025

Posted:

16 December 2025

You are already at the latest version

Abstract

A novel amide-containing AIE polymer was synthesized via condensation polymerization of pyrazine-2,5-dicarboxylic acid and naphthalene-1,5-diamine. The polymer showed strong fluorescence in aggregates and selective quenching for Fe³⁺, serving as an efficient probe. The chelation-enhanced quenching mechanism was studied. This work offers a simple approach to AIE-active polymeric probes for environmental and biological sensing.

Keywords:

aggregation-induced emission

;

fluorescence probe

;

polymer

Subject:

Chemistry and Materials Science - Materials Science and Technology

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