A triphenylamine-functionalized fluorescent organic polymer as a turn-on fluorescent sensor for Fe3+ ion with high sensitivity and selectivity
Source abstract
Abstract
A triphenylamine-functionalized A3B2-type covalent organic polymer (TPA-COP) was synthesized by the palladium-catalyzed Sonogashira polycondensation reaction from tris(4-ethynylphenyl)amine and 4-bromo-N-(4-bromo-2-methoxybenzylidene)-2-methoxyaniline. The obtained polymer possessing amorphous structure and good thermal stability exhibited strong yellow–green luminescence with an emission band at 498 nm. It is worth noting that the polymer also shows selective turn-on fluorescence response to Fe3+ ion over a variety of other competing metal ions such as Na+, K+, Ca2+, Mg2+, Ba2+, Mn2+, Cr3+, Cu2+, Ni2+, Zn2+, Co2+, Al3+. The fluorescent detection limit of TPA-COP sensor for Fe3+ in solution was 4.3 × 10−7 M. Furthermore, the proposed sensing mechanism should result from complexation between tridentate-coordinated Schiff base sites and Fe3+ ion, which was further investigated by fluorescence titration, 1H NMR and IR measures, together with fluorescence lifetime analysis.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Covalent Organic Framework Applications · Molecular Sensors and Ion Detection · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (75)
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