An Electrochemical Sensor Platform for Sensitive Detection of Iron (III) Ions Based on Pyrene-Substituted Poly(2,5-dithienylpyrrole)

Abstract

Conducting polymers, which have a great potential for use in many technological application areas, can be used to design new selective, sensitive, highly efficient and practical sensor platforms. Herein, a pyrene-substituted 2,5-dithienylpyrrole (TPP) has been synthesized and its conductive polymer has been coated electrochemically on the ITO electrode surface to form a new sensor platform. After electrochemical and surface characterization of conducting polymer based sensor platform, its electrochemical responses to different metal ions have been investigated in aqueous media. It has been determined that P(TPP) displays excellent potentiometric response to Fe(III) ions while there is no significant electrochemical signal observed in other metal ion solutions including Fe(II), Zn(II), Cu(II), Hg(II), Cd(II). P(TPP) sensor platform has exhibited high stability, sensitivity, reproducibility toward the determination of Fe(III) with a good detection limit of 1.73 × 10−7 M. The sensor platform has great potential for disposable low-cost metal ion sensing platform which is convenient in-field testing application could be used in aqueous and biological samples.

Recent Advances in the Use of Biomass‐Derived Activated Carbon as an Electrode Material for Electroanalysis

“…[3,4] They are classified based on the method adopted for sensing, including optical, [5][6][7][8] electrochemical, [9,10] electrical, [11] thermometric, [12] mass sensitive, [13] magnetic [14][15][16] etc. They can also be classified based on the type of analyte into different types, including pH electrodes [17] and sensors for metal ions and determining gases, [18][19][20] as well as the mode of application into in vivo [21] and in vitro [22] sensors for process monitoring. Among these methods, electrochemical methods possess remarkable features, such as high sensitivity, short response time, low cost, simplicity of instrumentation, the possibility of miniaturization, and integration with portable devices.…”

“…They are classified based on the method adopted for sensing, including optical, [5–8] electrochemical, [9,10] electrical, [11] thermometric, [12] mass sensitive, [13] magnetic [14–16] etc. They can also be classified based on the type of analyte into different types, including pH electrodes [17] and sensors for metal ions and determining gases, [18–20] as well as the mode of application into in vivo [21] and in vitro [22] sensors for process monitoring.…”

An Electrochemical Sensor Based on Gold and Bismuth Bimetallic Nanoparticles Decorated L-Cysteine Functionalized Graphene Oxide Nanocomposites for Sensitive Detection of Iron Ions in Water Samples

“…The results showed that the Au-BiNPs/SH-GO/GCE has a better sensitivity to the Fe(III). Compared with other previously reported sensors for Fe(III) detection ( Table 1 ) [ 44 , 45 , 46 , 47 , 48 , 49 ], the proposed sensing platform processed more sensitivity and lower limit of detection.…”

Recent Advances in Chemical Sensors for Soil Analysis: A Review

“…Ayranci and Ak have developed an iron(III)-sensitive sensor based on a pyrenesubstituted 2,5-dithienylpyrrole (TPP) conductive polymer electrochemically deposited on an ITO electrode's surface [178]. The investigation of the electrochemical response of the sensor to different metal ions in aqueous media showed the excellent potentiometric response to Fe(III) ions with a DL of 1.73 × 10 −7 M, whereas there was no significant electrochemical signal observed in other metal ion solutions, including Fe(II), Zn(II), Cu(II), Hg(II), and Cd(II).…”