Determination of quercetin using a photo-electrochemical sensor modified with titanium dioxide and a platinum(II)-porphyrin complex

Tian, Li; Wang, Binbin; Chen, Ruizhan; Gao, Ye; Chen, Yanling; Li, Tianjiao

doi:10.1007/s00604-014-1374-7

Cited by 19 publications

(7 citation statements)

References 34 publications

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“…Li and co-workers developed a photoelectrochemical sensor based on porphyrins to detect quercetin, a bioactive polyphenol compound used to prevent different human diseases, like cancer and diabetes. 261 The developed device consisted of a composite film containing titanium dioxide and a platinum porphyrin complex PtP (Scheme 13) deposited on a glassy carbon electrode by drop casting. Different parameters of the prepared electrode TiO 2 /PtP/GCE were studied and optimized, such as the optimal mass of TiO 2 , the illumination time and the applied potential.…”

Section: Photoelectrochemical Sensorsmentioning

confidence: 99%

Porphyrinoids for Chemical Sensor Applications

et al. 2016

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Porphyrins and related macrocycles have been intensively exploited as sensing materials in chemical sensors, since in these devices they mimic most of their biological functions, such as reversible binding, catalytic activation, and optical changes. Such a magnificent bouquet of properties allows applying porphyrin derivatives to different transducers, ranging from nanogravimetric to optical devices, also enabling the realization of multifunctional chemical sensors, in which multiple transduction mechanisms are applied to the same sensing layer. Potential applications are further expanded through sensor arrays, where cross-selective sensing layers can be applied for the analysis of complex chemical matrices. The possibility of finely tuning the macrocycle properties by synthetic modification of the different components of the porphyrin ring, such as peripheral substituents, molecular skeleton, coordinated metal, allows creating a vast library of porphyrinoid-based sensing layers. From among these, one can select optimal arrays for a particular application. This feature is particularly suitable for sensor array applications, where cross-selective receptors are required. This Review briefly describes chemical sensor principles. The main part of the Review is divided into two sections, describing the porphyrin-based devices devoted to the detection of gaseous or liquid samples, according to the corresponding transduction mechanism. Although most devices are based on porphyrin derivatives, seminal examples of the application of corroles or other porphyrin analogues are evidenced in dedicated sections.

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Section: Photoelectrochemical Sensorsmentioning

confidence: 99%

Porphyrinoids for Chemical Sensor Applications

et al. 2016

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“…Current responses associated with various analyte concentrations are useful for detection limit determination while scan rate modulation is important for kinetic studies. For example, this approach was taken for detecting quercetin, a natural therapeutic drug, via a modified glassy carbon electrode with titanium oxide and a Pt‐based porphyrin; [5] for quantifying L‐cysteine via a gold electrode modified with a peripherally alkanethiolated‐CoPc; [6] for sensing anionic pollutants using ferrocene‐containing macrocyclic amides; [7] and sensing industrially and environmentally relevant phenols with biosensors based on ITO and peripherally substituted boron subphthalocyanines (BsubPcs) [8] . In the latter case, improved responses were observed when using modified BsubPc‐electrodes with enzymes (phenyl oxidases), especially when the BsubPc molecule had 6 peripheral phenoxy groups (ie.…”

Section: Introductionmentioning

confidence: 99%

Variables of the Analytical Electrochemical Data Acquisition for Boron Subphthalocyanines

et al. 2021

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The electrochemical behavior of boron subphthalocyanines (BsubPcs) has been investigated using cyclic voltammetry in the presence of various solvents, internal standards, supporting electrolytes, working electrodes, and sweep voltage scan rates. We have focused on halogenated BsubPcs (Cl−Cl6BsubPc, Cl−Cl12BsubPc, F−F6BsubPc, F−F12BsubPc) and a non‐halogenated baseline (Cl−BsubPc). Halogenated BsubPcs are of interest to the field due to their promising advances as organic electronic materials for applications based on redox or electron transfer processes. We had pre‐established a standard operating procedure (SOP) for electrochemical data acquisition, but it was timely to consider alternative variables, their impact on the electrochemical data and re‐establish an alternative SOP. We observed modest shifts (up to 49 mV) of the BsubPc redox potentials when changing the internal standard, working electrode and/or the electrolyte concentration. In scan rate range between 20 and 250 mV s−1, the peak (ir)reversibility for F−F6BsubPc and F−F12BsubPc remained unchanged and the electron transfers at the surface electrode remained diffusion‐controlled.

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“…Moreover, the UV-curing post-printing treatment option enables the deposition on organic flexible substrates and inkjet printing allows for direct patterning of arbitrary patterns. Such capability may be highly useful for the fabrication of electrochemical sensors [53,54], photochemical cells with special electrode geometry [55] or inverted structure polymer solar cells [56,57,58] because in all these devices patterned titania layers are needed.…”

Section: Resultsmentioning

confidence: 99%

Cold-Setting Inkjet Printed Titania Patterns Reinforced by Organosilicate Binder

et al. 2015

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Abstract:A hybrid organo-silica sol was used as a binder for reinforcing of commercial titanium dioxide nanoparticles (Evonic P25) deposited on glass substrates. The organo-silica binder was prepared by the sol-gel process and mixtures of titania nanoparticles with the binder in various ratios were deposited by materials printing technique. Patterns with both positive and negative features down to 100 µm size and variable thickness were reliably printed by Fujifilm Dimatix inkjet printer. All prepared films well adhered onto substrates, however further post-printing treatment proved to be necessary in order to improve their reactivity. The influence of UV radiation as well as of thermal sintering on the final electrochemical and photocatalytic properties was investigated. A mixture containing 63 wt % of titania delivered a balanced compromise of mechanical stability, generated photocurrent density and photocatalytic activity. Although the heat treated samples yielded generally higher photocurrent, higher photocatalytic activity towards model aqueous pollutant was observed in the case of UV cured samples because of their superhydrophilic properties. While heat sintering remains the superior processing method for inorganic substrates, UV-curing provides a sound treatment option for heat sensitive ones.

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Determination of quercetin using a photo-electrochemical sensor modified with titanium dioxide and a platinum(II)-porphyrin complex

Cited by 19 publications

References 34 publications

Porphyrinoids for Chemical Sensor Applications

Porphyrinoids for Chemical Sensor Applications

Variables of the Analytical Electrochemical Data Acquisition for Boron Subphthalocyanines

Cold-Setting Inkjet Printed Titania Patterns Reinforced by Organosilicate Binder

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