Photoswitchable Electrocatalysis and Catalyzed Chemiluminescence Using Photoisomerizable Monolayer-Functionalized Surfaces and Pt Nanoparticles

Niazov, Tamara; Shlyahovsky, Bella; Willner, Itamar

doi:10.1021/ja0707052

Cited by 99 publications

(71 citation statements)

References 14 publications

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“…Many other unique systems have been designed and studied using various photoswitchable spiropyran derivatives associated with modified electrodes, particularly in combination with different kinds of nanoparticles. For example, these systems demonstrated photoswitchable electrocatalysis in the presence of Pt nanoparticles , photochemically‐controlled deposition of Ag nanoclusters , patterning at the modified surfaces using Ag nanoparticles , photochemically‐controlled change of surface wettability with Au nanoparticles , etc. Electrodes functionalized with photoswitchable spiropyran derivatives have been used to realize Boolean logic gates and optical memory systems , design various electrochemical sensors , control ion transport through nanopores , assemble a multi‐signal responsive single‐molecule switch , realize surface systems with dual redox and proton gating , and perform many other highly sophisticated processes .…”

Section: Spiropyran‐merocyanine‐based Photoelectrochemical Switchesmentioning

confidence: 99%

Modified Electrodes and Electrochemical Systems Switchable by Light Signals

Katz¹

2018

Electroanalysis

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This article is an overview of extensive research efforts in many laboratories in the last two decades in the area of light‐switchable electrochemical systems and modified electrodes. Electrochemical reactions, including electrocatalytic and bioelectrocatalytic processes, have been reversibly activated and inhibited upon irradiation with light at different wavelengths. In order to realize these light activated or inhibited processes, the electrodes or/and reacting molecules were functionalized with photoisomerizable molecules including various derivatives of diarylethene, phenoxynaphthacenequinone, azobenzene and spiropyran/merocyanine. Photochemical reactions of these species resulted in change of their redox activity, conformation and electrical charge. All these changes affected electrode surfaces or (bio)molecules resulting in switching ON‐OFF corresponding (bio)electrochemical processes. Various systems based on different light‐controlled reactions are reviewed and discussed with specific examples and with many illustrating figures. Possible extensions of the research area and future applications are briefly overviewed in the conclusion section. The present comprehensive review is addressed to a broad scientific community, including newcomers to the area.

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Section: Spiropyran‐merocyanine‐based Photoelectrochemical Switchesmentioning

confidence: 99%

Modified Electrodes and Electrochemical Systems Switchable by Light Signals

Katz¹

2018

Electroanalysis

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“…Nanoscale noble metals, such as platinum (Pt) , gold (Au) , and palladium (Pd) , silver (Ag) have commonly been used for the construction of H 2 O 2 sensors because of their large specific surface areas, high conductivities, and excellent electrocatalytic activities. However, the expensive cost of noble metals for H 2 O 2 sensors led to investigation of other alternatives of low‐cost inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Cuprous Oxide/Gold Nanocomposites for Nonenzymatic Amperometric Sensing of Hydrogen Peroxide

et al. 2017

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In this work, a facile preparation method of cuprous oxide/gold (Cu2O/Au) nanocomposite was successfully developed. The process consisted of one‐pot co‐reduction of HAuCl4 and CuSO4 using ascorbic acid (AA) as a reducing agent at room temperature under magnetic stirring. The structures and compositions of the as‐prepared products were characterized by SEM, EDS, and XRD. Cyclic voltammetry and chronopotentiometry studies revealed that the as‐prepared cubic Cu2O/Au nanocomposites showed enhanced performance towards the non‐enzymatic catalytic reduction of hydrogen peroxide (H2O2) when compared to single‐component Cu2O nanocubes. The linear range of H2O2 determination spanned over 4 orders of magnitude (1 μM∼16.7 mM) and the detection limit was low as 0.45 μM (S/N=3). The enhanced performance of cubic Cu2O/Au was attributed to: i) the synergistic effect between Cu2O and Au, ii) the increase in surface area induced by the reduced size of the nanocubes, and iii) the improved electrical conductivity due to the presence of Au in the particles. Overall, the cubic Cu2O/Au nanocomposites prepared by the proposed method hold great promise for future practical use in H2O2 detection.

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“…The switchable electrocatalytic interface for BFC-based sensors usually employ specific materials with tunable functions. These typical examples include monolayer photoisomer linked to bio-catalysts with photoswitchable bioelectrocatalytic processes, [17][18][19] and pH-sensitive redox polymer switched between the redox active andi nactive states upon pH-induced swelling and shrinking processes, [20][21][22][23] etc. However,t hese developed switchable electrodes can only switch between the ON and OFF states with limited ability for sensora pplication.…”

Section: Introductionmentioning

confidence: 99%

Rational Tuning of the Electrocatalytic Nanobiointerface for a “Turn‐Off” Biofuel‐Cell‐Based Self‐Powered Biosensor for p53 Protein

Han

Chabu

et al. 2015

Chemistry A European J

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Herein, a novel tunable electrocatalytic nanobiointerface for the construction of a high-sensitivity and high-selectivity biofuel-cell (BFC)-based self-powered biosensor for the detection of transcription factor protein p53 is reported, in which bilirubin oxidase (BOD)/DNA supramolecular modified graphene/platinum nanoparticles hybrid nanosheet (GPNHN) works as a new enhanced material of biocathode to control the attachment of target, and thus tune the electron-transfer process of oxygen reduction for transducing signaling magnification. It is found that in the presence of p53, the strong interaction between the wild-type p53 and its consensus DNA sequence on the electrode surface can block the electron transfer from the BOD to the electrode, thus providing a good opportunity for reducing the electrocatalytic activity of oxygen reduction in the biocathode. This in combination with the glucose oxidation at the carbon nanotube/Meldola's blue/glucose dehydrogenase bioanode can result in a current/or power decrease of BFC in the presence of wild-type p53. The specially designed BFC-based self-powered p53 sensor shows a wide linear range from 1 pM to 1 μM with a detection limit of 1 pM for analyzing wild-type p53. Most importantly, our BFC-based self-powered sensors can detect the concentrations of wild-type p53 in normal and cancer cell lysates without any extensive sample pretreatment/separation or specialized instruments. The present BFC-based self-powered sensor can provide a simple, economical, sensitive, and rapid way for analyzing p53 protein in normal and cancer cells at clinical level, which shows great potential for creating the treatment modalities that capitalize on the concentration variation of the wild-type p53.

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Photoswitchable Electrocatalysis and Catalyzed Chemiluminescence Using Photoisomerizable Monolayer-Functionalized Surfaces and Pt Nanoparticles

Cited by 99 publications

References 14 publications

Modified Electrodes and Electrochemical Systems Switchable by Light Signals

Modified Electrodes and Electrochemical Systems Switchable by Light Signals

Facile Synthesis of Cuprous Oxide/Gold Nanocomposites for Nonenzymatic Amperometric Sensing of Hydrogen Peroxide

Rational Tuning of the Electrocatalytic Nanobiointerface for a “Turn‐Off” Biofuel‐Cell‐Based Self‐Powered Biosensor for p53 Protein

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