Graphene-induced tiny flowers of organometallic polymers with ultrathin petals for hydrogen peroxide sensing

Liang, Guodong; Zheng, Limin; Bao, Suping; Gao, Haiyang; Zhu, Fangming; Wu, Qing

doi:10.1016/j.carbon.2015.06.005

Cited by 11 publications

(3 citation statements)

References 56 publications

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“…Research on luminescent transition metal complexes has gained momentum since it was recognized that such compounds can be successfully applied as optical sensors, − emitters in organic light-emitting diodes (OLEDs), − photocatalysts, − and dyes for bioimaging. − Most of these applications make use of luminescence displayed by such materials. Therefore, understanding of the photophysical properties and the structure–function relationships is essential for engineering suitable materials.…”

Section: Introductionmentioning

confidence: 99%

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

et al. 2016

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Photophysical properties of four new platinum(II) complexes comprising extended ppy (Hppy = 2-phenylpyridine) and thpy (Hthpy = 2-(2'-thienyl)pyridine) cyclometalated ligands and acetylacetonate (acac) are reported. Substitution of the benzene ring of Pt-ppy complexes 1 and 2 with a more electron-rich thiophene of Pt-thpy complexes 3 and 4 leads to narrowing of the HOMO-LUMO gap and thus to a red shift of the lowest energy absorption band and phosphorescence band, as expected for low-energy excited states of the intraligand/metal-to-ligand charge transfer character. However, in addition to these conventional spectral shifts, another, at first unexpected, substitution effect occurs. Pt-thpy complexes 3 and 4 are dual emissive showing fluorescence about 6000 cm(-1) (∼0.75 eV) higher in energy relative to the phosphorescence band, while for Pt-ppy complexes 1 and 2 only phosphorescence is observed. For dual-emissive complexes 3 and 4, ISC rates kISC are estimated to be in order of 10(9)-10(10) s(-1), while kISC of Pt-ppy complexes 1 and 2 is much faster amounting to 10(12) s(-1) or more. The relative intensities of the fluorescence and phosphorescence signals of Pt-thpy complexes 3 and 4 depend on the excitation wavelength, showing that hyper-intersystem crossing (HISC) in these complexes is observably significant.

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Section: Introductionmentioning

confidence: 99%

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

et al. 2016

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“…The results can be attributed to the greater surface area and defects in the PB‐mpz structure in comparison with PB, in agreement with the results obtained by Job's method. An increase in the surface area or a change in the geometry of the PB films may also lead to a very low detection limit , . The PB‐modified electrodes show a linear response to hydrogen peroxide reduction in the range of 0 to 2.5 × 10 –3 mol L –1 .…”

Section: Resultsmentioning

confidence: 99%

Improvement in Efficiency of the Electrocatalytic Reduction of Hydrogen Peroxide by Prussian Blue Produced from the [Fe(CN)₅(mpz)]^2– Complex

et al. 2017

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Hydrogen peroxide is one of the most important molecules in chemical signaling in living organisms. Because of this, its sensing is indispensable for the diagnosis of many diseases. Among the materials used for the detection and quantification of H 2 O 2 , Prussian Blue (PB) has been highlighted due to its performance. Therefore, the search for alternatives or the improvement of PB performance is a challenge. In this context, our motivation was to evaluate how the ligand N-methylpyrazinium affects the structure and reactivity of Prussian Blue films [a]

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“…Nevertheless, the adhesion of PB requires high-quality active supports for immobilization [29][30][31]. Therefore, reduced graphene oxide (rGO) is introduced to increase the surface area of the electrode [32,33]. Meanwhile, rGO is endowed with ideal electrochemical properties, such as large a two-dimensional electrical conductivity and a large amount of edge-plan-like defects, enhancing the direct electron transfer between the enzyme's active sites and the electrode [34].…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Amperometric Glutamate Oxidase Microbiosensor Based on a Reduced Graphene Oxide/Prussian Blue Nanocube/Gold Nanoparticle Composite Film-Modified Pt Electrode

Chen

et al. 2020

Sensors

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A simple method that relies only on an electrochemical workstation has been investigated to fabricate a highly sensitive glutamate microbiosensor for potential neuroscience applications. In this study, in order to develop the highly sensitive glutamate electrode, a 100 µm platinum wire was modified by the electrochemical deposition of gold nanoparticles, Prussian blue nanocubes, and reduced graphene oxide sheets, which increased the electroactive surface area; and the chitosan layer, which provided a suitable environment to bond the glutamate oxidase. The optimization of the fabrication procedure and analytical conditions is described. The modified electrode was characterized using field emission scanning electron microscopy, impedance spectroscopy, and cyclic voltammetry. The results exhibited its excellent sensitivity for glutamate detection (LOD = 41.33 nM), adequate linearity (50 nM–40 µM), ascendant reproducibility (RSD = 4.44%), and prolonged stability (more than 30 repetitive potential sweeps, two-week lifespan). Because of the important role of glutamate in neurotransmission and brain function, this small-dimension, high-sensitivity glutamate electrode is a promising tool in neuroscience research.

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Graphene-induced tiny flowers of organometallic polymers with ultrathin petals for hydrogen peroxide sensing

Cited by 11 publications

References 56 publications

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

Improvement in Efficiency of the Electrocatalytic Reduction of Hydrogen Peroxide by Prussian Blue Produced from the [Fe(CN)₅(mpz)]^2– Complex

A Highly Sensitive Amperometric Glutamate Oxidase Microbiosensor Based on a Reduced Graphene Oxide/Prussian Blue Nanocube/Gold Nanoparticle Composite Film-Modified Pt Electrode

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Graphene-induced tiny flowers of organometallic polymers with ultrathin petals for hydrogen peroxide sensing

Cited by 11 publications

References 56 publications

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

Modulation of Intersystem Crossing Rate by Minor Ligand Modifications in Cyclometalated Platinum(II) Complexes

Improvement in Efficiency of the Electrocatalytic Reduction of Hydrogen Peroxide by Prussian Blue Produced from the [Fe(CN)5(mpz)]2– Complex

A Highly Sensitive Amperometric Glutamate Oxidase Microbiosensor Based on a Reduced Graphene Oxide/Prussian Blue Nanocube/Gold Nanoparticle Composite Film-Modified Pt Electrode

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Improvement in Efficiency of the Electrocatalytic Reduction of Hydrogen Peroxide by Prussian Blue Produced from the [Fe(CN)₅(mpz)]^2– Complex