Electron Transfer Mediated Electrochemical Biosensor for MicroRNAs Detection Based on Metal Ion Functionalized Titanium Phosphate Nanospheres at Attomole Level

2015 ◽  
Vol 7 (4) ◽  
pp. 2979-2985 ◽  
Author(s):  
Fang-Fang Cheng ◽  
Ting-Ting He ◽  
Hai-Tiao Miao ◽  
Jian-Jun Shi ◽  
Li-Ping Jiang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Metal Ion ◽  
Electrochemical Biosensor ◽  
Titanium Phosphate

Thermally Induced Electron Transfer in a CsCoFe Prussian Blue Derivative: The Specific Role of the Alkali-Metal Ion

2004 ◽  
Vol 116 (28) ◽  
pp. 3814-3817 ◽  
Author(s):  
Anne Bleuzen ◽  
Virginie Escax ◽  
Alban Ferrier ◽  
Françoise Villain ◽  
Michel Verdaguer ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Alkali Metal ◽  
Prussian Blue ◽  
Metal Ion ◽  
Specific Role ◽  
Alkali Metal Ion ◽  
Thermally Induced

On the Kinetics and Mechanism of Spontaneous Intramolecular Reduction of the Central Metal Ion in K2[Mn(IV)-2-α-hydroxyethyl isochlorin e4] Acetate in Aqueous Alkaline Solutions and its Relation to the Binding Sites of Manganese in Photosynthesis

1975 ◽  
Vol 30 (5-6) ◽  
pp. 327-332 ◽  
Author(s):  
Gerhard Vierke ◽  
Manfred Müller
Keyword(s):  
Electron Transfer ◽  
Metal Ion ◽  
Reaction Rates ◽  
Bimolecular Reaction ◽  
Reduction Reaction ◽  
Alkaline Solutions ◽  
Central Metal ◽  
Pseudo First Order Reaction ◽  
Spontaneous Reduction ◽  
Acid Base Equilibrium

Abstract Spectrophotometric investigation of the kinetics of the spontaneous reduction of the central metal ion in K2[Mn (IV)-2-α-hydroxyethyl-isochlorine e4] acetate in aqueous alkaline solution in the absence of any reducing agent reveals that it is a pseudo-first order reaction which is specifically hydroxide ion catalyzed. The pKα-value of the acid-base equilibrium has been estimated to be 14.4. Electron transfer to the central metal ion is the rate limiting step. The measurements of its temperature dependence yields an activation enthalpy of ∆H‡ = 12 kcal/mol and an entropy of activation ∆S‡ = - 30 e.u. thus indicating that the electron transfer step is a bimolecular reaction. The most likely reactant is water. The reduction reaction does not take place with appreciable reaction rates at physiological pH. Thus, when bound to a suitable ligand of the chlorin type, Mn (IV)-compounds are sufficiently stable with respect to autoxidation to play some role in biological redox reactions as postulated recently for the photoreactivation process of the water splitting system in photosynthesis.

Development of a Metal-Ion-Mediated Base Pair for Electron Transfer in DNA

2013 ◽  
Vol 19 (37) ◽  
pp. 12547-12552 ◽  
Author(s):  
Thomas Ehrenschwender ◽  
Wolfgang Schmucker ◽  
Christian Wellner ◽  
Timo Augenstein ◽  
Patrick Carl ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Base Pair ◽  
Metal Ion

scholarly journals An electrochemical biosensor exploiting binding-induced changes in electron transfer of electrode-attached DNA origami to detect hundred nanometer-scale targets

Nanoscale ◽  
2020 ◽  
Vol 12 (26) ◽  
pp. 13907-13911 ◽  
Author(s):  
Netzahualcóyotl Arroyo-Currás ◽  
Muaz Sadeia ◽  
Alexander K. Ng ◽  
Yekaterina Fyodorova ◽  
Natalie Williams ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electrochemical Biosensor ◽  
Direct Detection ◽  
Dna Origami ◽  
Nanometer Scale ◽  
Recognition Element ◽  
Induced Changes

Using DNA origami as the recognition element in an electrochemical biosensor enables the selective and direct detection of “mesoscale” virus-sized analytes.

Competitive electrochemical biosensing of biotin using cadmium-modified titanium phosphate nanoparticles and 8-channel screen-printed disposable electrodes

2017 ◽  
Vol 9 (26) ◽  
pp. 3983-3991 ◽  
Author(s):  
Daniel Martín-Yerga ◽  
Javier Carrasco-Rodríguez ◽  
Francisco J. García Alonso ◽  
Agustín Costa-García
Keyword(s):  
Electrochemical Biosensor ◽  
Titanium Phosphate ◽  
Electrochemical Biosensing ◽  
Screen Printed Electrodes ◽  
Screen Printed

Detection of biotin in multivitamin tablets was performed with a competitive electrochemical biosensor using cadmium-modified titanium phosphate nanoparticles and 8-channel screen-printed electrodes.

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