Integrating polythiophene derivates to PCN-222(Fe) for electrocatalytic sensing of L-dopa

Chen, Yuling; Sun, Xin; Biswas, Sudip; Xie, You; Wang, Yan; Hu, Xiaoyun

doi:10.1016/j.bios.2019.111470

Cited by 41 publications

(23 citation statements)

References 36 publications

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“…The large 1D mesochannels and high surface area, in principle, should prove beneficial to enable rapid analyte aggregation and mass transport. [ 8a , 9a , 9b ]…”

Section: Resultsmentioning

confidence: 99%

“…Conversely, the chronoamperometric response of Mn‐PCN‐222/ITO towards different NB concentrations reveals the diffusion coefficient for NB to be 6.178×10 −6 cm 2 s −1 based on Cottrell's equation (Figure S11). [ 9a , 9c , 9d ]…”

Section: Resultsmentioning

confidence: 99%

“…The slight difference of sensitivity is likely to be an outcome of the following concentration‐guided factors: a) the abundance of catalytic sites implies their easy accessibility for the absorbed NB molecules at low concentrations; b) nevertheless at higher concentrations, these sites become sequestered owing to saturation with NB, thus compromising the sensitivity. [ 9a , 9b , 9c ] The limit of detection (LOD) is calculated as low as 0.03 μM (3×S b /slope, Figure S15, Table S2). Compared to the previously reported modified electrodes for NB detection, the proposed Mn‐PCN‐222/ITO electrode sets a benchmark analytical response towards NB in terms of a wide linear response and low LOD (Table S3).…”

Section: Resultsmentioning

confidence: 99%

“…Its electrocatalytic activity towards NB detection stands out, and can be correlated to its large surface area, expedited preconcentration, rapid mass transport and high density of the accessible, ordered active sites in Mn‐PCN‐222. [ 8a , 9a , 9b ]…”

Section: Resultsmentioning

confidence: 99%

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Porphyrinic MOF Film for Multifaceted Electrochemical Sensing

et al. 2021

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Electrochemical sensors are indispensable in clinical diagnosis, biochemical detection and environmental monitoring, thanks to their ability to detect analytes in real‐time with direct electronic readout. However, electrochemical sensors are challenged by sensitivity—the need to detect low concentrations, and selectivity—to detect specific analytes in multicomponent systems. Herein, a porphyrinic metal‐organic framework (PP‐MOF), Mn‐PCN‐222 is deposited on a conductive indium tin oxide (ITO) surface. It affords Mn‐PCN‐222/ITO, a versatile voltammetric sensor able to detect redox‐active analytes such as inorganic ions, organic hazardous substances and pollutants, including nitroaromatics, phenolic and quinone‐hydroquinone toxins, heavy metal ions, biological species, as well as azo dyes. As a working electrode, the high surface area of Mn‐PCN‐222/ITO enables high currents, and therefore leverages highly sensitive analysis. The metalloporphyrin centre facilitates analyte‐specific redox catalysis to simultaneously detect more than one analyte in binary and ternary systems allowing for detection of a wide array of trace pollutants under real‐world conditions, most with high sensitivity.

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“…The large 1D mesochannels and high surface area, in principle, should prove beneficial to enable rapid analyte aggregation and mass transport. [ 8a , 9a , 9b ]…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Porphyrinic MOF Film for Multifaceted Electrochemical Sensing

et al. 2021

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“…In our results, the peak position in the Q-band and Soret band regions were consistent with the published results [22], thereby showing that the Fe formed a metal organic framework in the Fe-loaded MOF-545(Fe). The FTIR results of the Fe metalized on the MOF-545 are shown in Figure S1, in which a stretching/bending vibration of the Fe-N bond around 1000 cm −1 was observed [32][33][34].…”

Section: Resultsmentioning

confidence: 99%

Fe-Loaded MOF-545(Fe): Peroxidase-Like Activity for Dye Degradation Dyes and High Adsorption for the Removal of Dyes from Wastewater

Zhang

et al. 2019

Molecules

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Methods to remove dye pollutants with natural enzyme, like horseradish peroxidase (HRP), are still limited due to high costs and low stability levels. The development of such a method with similar enzymatic activity is important and could be helpful in wastewater disposal. A metal organic framework material, Fe-loaded MOF-545 (Fe), was synthesized in our study as a new way to remove dyes due to its peroxidase-like activity. The structural characterizations of Fe-loaded MOF-545(Fe) was investigated using scanning electron microscopy (SEM), UV-Vis absorption spectra, and X-ray diffraction (XRD). The peroxidase-like (POD-like) activity of Fe-loaded MOF-545(Fe) was investigated under different pH and temperature conditions. Because of the Fe added into the MOF-545 structure, the absorption of Fe-loaded MOF-545(Fe) for acid (anionic) dyes (methyl orange (MO)) was better than for basic (cationic) dyes (methylene blue (MB)). The Fe-loaded MOF-545(Fe) could give a significant color fading for MO and MB over a short time (about two hours) with peroxidase-like activity. The remarkable capacity of Fe-loaded MOF-545(Fe) to remove the MO or MB is due to not only physical adsorption, but also degradation of the MO and MB with POD-like activity. Therefore, Fe-loaded MOF-545(Fe) has significant potential regarding dye removal from wastewater.

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Porphyrinischer MOF‐Film für vielfältige elektrochemische Sensorik

et al. 2021

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Elektrochemische Sensoren sind in der klinischen Diagnose, der biochemischen Detektion und der Umweltüberwachung unverzichtbar, dank ihrer Fähigkeit Analyten in Echtzeit mit direkter elektronischer Auslesung nachzuweisen. Allerdings sind Empfindlichkeit -Erkennen von niedrigen Konzentrationen, und Selektivität -Nachweis von spezifischen Analyten in Mehrkomponentensystemen, Herausforderungen für solche Sensoren. Hier wird ein porphyrinisches metallorganisches Gerüst (PP-MOF), Mn-PCN-222, auf einer leitfähigen Indium-Zinn-Oxid (ITO)-Oberfläche abgeschieden. Dadurch entsteht mit Mn-PCN-222/ITO ein vielseitiger voltammetrischer Sensor, der in der Lage ist, redoxaktive Analyten wie anorganische Ionen, organische Gefahr-und Schadstoffe, einschließlich Nitroaromaten, phenolische und Chinon-Hydrochinon-Toxine, Schwermetallionen, biologische Spezies sowie Azofarbstoffe zu detektieren. Als Arbeitselektrode ermçglicht die hohe Oberfläche von Mn-PCN-222/ITO hohe Strçme und damit eine hochempfindliche Analyse. Das Metalloporphyrin-Zentrum ermçglicht eine analytspezifische Redox-Katalyse zur gleichzeitigen Detektion von mehr als einem Analyt in binären und ternären Systemen. Hierdurch wird die Detektion einer Vielzahl von Spurenschadstoffen unter realen Bedingungen ermçglicht, meist mit hoher Empfindlichkeit.

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Integrating polythiophene derivates to PCN-222(Fe) for electrocatalytic sensing of L-dopa

Cited by 41 publications

References 36 publications

Porphyrinic MOF Film for Multifaceted Electrochemical Sensing

Porphyrinic MOF Film for Multifaceted Electrochemical Sensing

Fe-Loaded MOF-545(Fe): Peroxidase-Like Activity for Dye Degradation Dyes and High Adsorption for the Removal of Dyes from Wastewater

Porphyrinischer MOF‐Film für vielfältige elektrochemische Sensorik

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