One step electrosynthesis of conjugated polymers thin film for Fe3+ detection and its potential application

Abstract

a b s t r a c tPoly(9-fluorenecarboxylic acid) (PFCA) thin film was successfully fabricated onto the surface of indium tin oxide glass by one-step electropolymerization of commercially available 9-fluorenecarboxylic acid in boron trifluoride diethyl etherate. Meanwhile, PFCA thin film could specifically recognize Fe 3+ . Fe 3+ was generated by the oxidization of Fe 2+ in the presence of H 2 O 2 that was produced by biochemical reactions and resulted in fluorescence quenching of PFCA thin film. Furthermore, a sensing platform was designed for highly selective fluorescent detection of glucose. The qualitative and quantitative analysis of Fe 3+ , H 2 O 2 and glucose with detection limits of 1 M, 2.9 M and 3.4 M respectively could be implemented by a simple, cost-effective, reusable, practical and multi-functional PFCA thin film. The fabricated PFCA-based chemo/bio sensing film for fluorescent detection of Fe 3+ in rice sample or glucose in serum sample was assessed. Satisfactory results indicate that this work will provide not only a new strategy for fluorescent detection of important substances in agricultural science, but also significant theoretical guidance and important reference value for the practical application and development of multi-functional sensing device.

Design, Synthesis and Characterization of N‐Substituted Heteroaromatics: DFT‐Studies and Organic Light Emitting Device Application

“…Efficient molecular design and synthesis of novel fluorescent organic small molecules have attracted significant attention among the researchers for their promising applications in the field of fluorescent molecular probes, bioimaging, light-emitting electro-chemical cells, chemosensors, photovoltaics, and solid-state lighting. [1][2][3][4][5][6][7][8][9][10] Precise bandgap engineering of an organic molecule achieved by various chemical routes has proven successful in the generation of desired fluorescent color emission. Design strategies of active light emitters must result in the system possessing an optimal highest occupied and lowest unoccupied orbital energy levels to ease the charge injection and transport into the emissive layer.…”

“…Efficient molecular design and synthesis of novel fluorescent organic small molecules have attracted significant attention among the researchers for their promising applications in the field of fluorescent molecular probes, bioimaging, light‐emitting electro‐chemical cells, chemosensors, photovoltaics, and solid‐state lighting . Precise bandgap engineering of an organic molecule achieved by various chemical routes has proven successful in the generation of desired fluorescent color emission.…”

Highly sensitive detection of Cr(VI), Pb(II) and Cd(II) ions by a new fluorescent sensor based on 4-amino-3-hydroxynaphthalene sulfonic acid-doped polypyrrole

“…Conductive organic polymers (COPs) have been rarely applied as fluorescent sensors to determine low concentrations of heavy metals in solution [26,[28][29][30] In most cases, the determination of heavy metals was based on increased fluorescence quenching of COPs with heavy metal ion concentration, produced by interactions between the two components. Depending on the type of COP-heavy metal interaction, two main fluorescence quenching mechanisms were found: dynamic, resulting from collisions between a fluorescent COP and heavy metal ions, or static, due to the formation of a non-fluorescent complex between the polymer and metallic ions.…”

A novel fluorescent sensor based on electrosynthesized benzene sulfonic acid‐doped polypyrrole for determination of Pb(II) and Cu(II)

“…In contrast with CPs, electrosynthetized conducting organic polymers (COPs) have been very rarely utilized as fluorescent sensors for heavy metals . Several types of fluorescent COPs, such as poly(pyrrole‐pyrene) and poly(9‐fluorenecarboxylic acid) (PFCA) have been electrochemically synthesized. These electrosynthesized COPs could be used as fluorescent sensors for the determination of traces of heavy metals in solution, but, in fact, until now, only the fluorescence quenching of PFCA thin films on indium tin oxide (ITO) has been applied by Ding et al to the specific recognition and determination of Fe 3+ ions, with a LOD of 1 μM.…”