Morphology formation mechanism and electrochemical performance of poly(o-phenylenediamine) based electrode materials

Lan, Haidie; Muslim, Arzugul; Hojiahmat, Mehriban; Wang, Lin; Yu, Meng; Zhong, Qing

doi:10.1016/j.synthmet.2020.116688

Cited by 8 publications

(3 citation statements)

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“…For NIP, the XRD patterns at 14.6°, 22.1°, 25.3°, and 33.3° were observed, suggesting the presence of PANI and poly( o -PDA). 38 − 40 For pre-elution MIP, the XRD patterns were observed at 6.3°, 9.4°, and 18.9°, indicating the presence of the copolymer PANI and poly( o -PDA). Notably, the copolymer pattern was shifted from its initial position, and other small peaks were observed.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Sensor Based on a Composite of Reduced Graphene Oxide and Molecularly Imprinted Copolymer of Polyaniline–Poly(o-phenylenediamine) for Ciprofloxacin Determination: Fabrication, Characterization, and Performance Evaluation

et al. 2023

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Contamination of antibiotics in water is a major cause of antibiotic resistance (ABR) in pathogens that endangers human health and food security worldwide. Ciprofloxacin (CIP) is a synthetic fluoroquinolone (FQ) antibiotic and is reportedly present in surface water at a concentration exceeding the ecotoxicological predicted no-effect concentration in some areas. This study fabricated a CIP sensor using an electropolymerized molecularly imprinted polymer (MIP) of polyaniline (PANI) and poly(o-phenylenediamine) (o-PDA) with CIP recognition sites. The MIP was coated on a reduced graphene oxide (rGO)modified glassy carbon electrode (rGO/GCE) and operated under a differential pulse voltammetry (DPV) mode for CIP detection. The sensor exhibited an excellent response from 1.0 × 10 −9 to 5.0 × 10 −7 mol L −1 CIP, showing a sensor detection limit and sensitivity of 5.28 × 10 −11 mol L −1 and 5.78 μA mol −1 L, respectively. The sensor's sensitivity for CIP was 1.5 times higher than that of the other tested antibiotics, including enrofloxacin (ENR), ofloxacin (OFX), sulfamethoxazole (SMZ), and piperacillin sodium salt (PIP). The reproducibility and reusability of the sensor devices were also studied.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Sensor Based on a Composite of Reduced Graphene Oxide and Molecularly Imprinted Copolymer of Polyaniline–Poly(o-phenylenediamine) for Ciprofloxacin Determination: Fabrication, Characterization, and Performance Evaluation

et al. 2023

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“…Conjugated polymers have gained significant research interest in material development for chemical, electrochemical, and biochemical sensors. The excellent optical, electrical, and thermal properties, easy synthesis, and low cost of production were attractive for conjugated polymer-based devices. − The intrinsic physicochemical properties of conjugated polymers depend on their conjugated electronic structure and macromolecular behavior . The ultraviolet–visible (UV–vis) absorption or fluorescence properties of conjugated polymers have shown high sensitivity and selectivity in analyte detection. − It is also helpful in determining the limit of detection (LoD) of analytes at micro or nanomolar concentrations. − The good electrochemical performance of the conjugated polymers was suitable for charge-storage devices and electrode material fabrication and as an electron transfer mediator in living cells. − Reversible or irreversible conjugated structures of conjugated polymers could be achieved via a chemical or electrochemical method.…”

Section: Introductionmentioning

confidence: 99%

Silver Ion-Induced Reversible Turn-Off Fluorescence in Redox States of Poly-o-phenylenediamine

Das,

Antony

2024

Ind. Eng. Chem. Res.

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In the present work, we report the sensing of silver ions by yellow fluorescence turn-off in poly-o-phenylenediamine (POPD) solution via an oxidative mechanism. Poly-o-phenylenediamine was synthesized by chemical oxidative polymerization using ferric chloride as an oxidizing agent in ethanol solvent. Proton nuclear magnetic resonance spectra of the POPD revealed two types of protons corresponding to benzenoid and quinonoid structures in semioxidized POPD. Fourier transform infrared (FT-IR) spectra confirmed the presence of benzenoid and quinoid absorption bands in poly-o-phenylenediamine. Powder X-ray diffraction (PXRD) patterns revealed sharp peaks at 2θ values of 10.54 and 26.70°, indicating the crystalline nature of the polymer. Matrix-assisted laser desorption/ionizationtime-of-flight (MALDI-TOF) analysis indicated the presence of 5−6 repeating monomeric units in POPD. POPD has intense yellow fluorescence in water, and its fluorescence emission was quenched upon oxidation with AgNO 3 . Fluorescence spectra and naked-eye detection studies have revealed that an analyte to polymer molar ratio of 10 was obtained for fluorescence quenching. The POPD polymer has shown oxidative fluorescence turn-off and reductive fluorescence turn-on with specific redox analytes, indicating reversible structures of POPD. The cyclic voltammogram of POPD indicated the presence of electrochemically reversible redox states, particularly in the negative voltage sweep in the polymer solution. The oxidized POPD was nonfluorescent, and fluorescence emission reappeared upon adding NaBH 4 to the oxidized POPD. Thus, reversible fluorescence turn-off and turn-on in poly-o-phenylenediamine may provide an attractive strategy for sensing various oxidizing/reducing analytes in water.

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“…An MIP that can be synthesized from o-phenylenediamine (o-PD) which was found to be successful to detect triclosan with the limit of detection (LOD) of 8.0 × 10 −7 mol l −1 by Liu et al, 2009 55 There are several reports where Poly-o-Phenylenediamine (Poly-o-PD) was synthesized by chemical routes. [56][57][58][59][60][61] These incorporate toxic materials, require complex procedures, and are time consuming. An elegant alternative is the electrochemical route, which is easy, robust and avoids toxic chemicals.…”

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confidence: 99%

An o-Phenylenediamine and MWCNT-Based Electrochemical Sensor for the Detection of Triclosan by Cyclic Voltammetry

Dutta,

Pushpavanam

2024

J. Electrochem. Soc.

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Selectivity and sensitivity are the two key parameters for construction of a sensor. In this work, a novel electrochemical sensor based on molecularly-imprinted composites synthesized from o-phenylenediamine (o-PD) and multiwalled carbon nanotube (MWCNT) to detect triclosan is reported. Two different sensors were developed MIC/GC and MIC/cf-MWCNT/GC. To fabricate MIC/GC, molecularly imprinted composite (MIC) was synthesized by cyclic voltammetry using o-PD, COOH-functionalized MWCNT (cf-MWCNT) and triclosan on glassy carbon (GC) electrode, following removal of surface triclosan. MIC/cf-MWCNT/GC was fabricated by synthesizing MIC on cf-MWCNT coated GC. Template removal was performed using NaOH solution. MIC/GC could detect triclosan till 40 ppb while using MIC/cf-MWCNT/GC, 10 ppb of limit of detection (LOD) was achieved. Adsorption isotherms were constructed for both the films. Langmuir adsorption isotherm gave the best fit for MIC/cf-MWCNT/GC with -ΔGads value of 54.952 kJ/mol indicating stronger chemisorption. To understand the role of cf-MWCNT in detection of triclosan, electrochemical band gap studies, electrochemical impedance spectroscopy, and cyclic voltammetry studies were conducted. Both sensors were found to be efficient for detection of triclosan in the presence of interfering ions.

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Morphology formation mechanism and electrochemical performance of poly(o-phenylenediamine) based electrode materials

Cited by 8 publications

References 50 publications

Electrochemical Sensor Based on a Composite of Reduced Graphene Oxide and Molecularly Imprinted Copolymer of Polyaniline–Poly(o-phenylenediamine) for Ciprofloxacin Determination: Fabrication, Characterization, and Performance Evaluation

Electrochemical Sensor Based on a Composite of Reduced Graphene Oxide and Molecularly Imprinted Copolymer of Polyaniline–Poly(o-phenylenediamine) for Ciprofloxacin Determination: Fabrication, Characterization, and Performance Evaluation

Silver Ion-Induced Reversible Turn-Off Fluorescence in Redox States of Poly-o-phenylenediamine

An o-Phenylenediamine and MWCNT-Based Electrochemical Sensor for the Detection of Triclosan by Cyclic Voltammetry

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