Kinetics of reduction of Se (IV) by vitamin C with green synthesis of cluster-grapes nanoparticles: A Mechanistic approach on electron-transfer of nanoparticle growth rates

2021 ◽  
pp. 131575
Author(s):  
Refat Hassan
Keyword(s):  
Electron Transfer ◽  
Vitamin C ◽  
Green Synthesis ◽  
Growth Rates ◽  
Nanoparticle Growth ◽  
Mechanistic Approach ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Chicken liver sulfite oxidase. Kinetics of reduction by laser-photoreduced flavins and intramolecular electron transfer

Biochemistry ◽  
1988 ◽  
Vol 27 (8) ◽  
pp. 2918-2926 ◽  
Author(s):  
Cary A. Kipke ◽  
Michael A. Cusanovich ◽  
Gordon Tollin ◽  
Roger A. Sunde ◽  
John H. Enemark
Keyword(s):  
Electron Transfer ◽  
Sulfite Oxidase ◽  
Chicken Liver ◽  
Intramolecular Electron Transfer ◽  
Kinetics Of ◽  
Kinetics Of Reduction

Outer-sphere electron transfer reactions of aqua(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-1-acetato) nickel(II) and (III).

2003 ◽  
Vol 81 (2) ◽  
pp. 186-192 ◽  
Author(s):  
Robert I Haines ◽  
Dean R Hutchings
Keyword(s):  
Electron Transfer ◽  
Exchange Rate ◽  
Outer Sphere ◽  
Second Order ◽  
Marcus Theory ◽  
Pendant Arm ◽  
Key Words Nickel ◽  
Kinetics Of ◽  
Kinetics Of Reduction ◽  
Sphere Mechanism

The outer-sphere oxidation of the nickel(II) complex of the deprotonated pendant-arm macrocycle, 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-1-acetate, [NiL1(OH2)]+ by bis-(1,4,7-triazacyclononane)nickel(III), [Ni(tacn)2]3+ has been studied in aqueous perchlorate media. The reaction displays reversible second-order behaviour and the kinetic study reveals the forward and reverse rate constants for the reaction: [Formula: see text] The kinetics show the forward reaction to be acid dependent, a feature that is attributed to protonation of the acetato group of the nickel(II) complex. Using Marcus theory, the self-exchange rate for the [NiL1(OH2)]+/2+ couple has been calculated. The nickel(II/III) electron transfer is a reversible one electron process with E° = 1.04 V (vs. S.H.E.). The formation of the authentic nickel(III) product has been confirmed by esr spectroscopy. The kinetics of reduction of the [NiL1(OH2)]2+ species by Fe2+(aq) exhibits a second-order rate law, the reaction being independent of acid. Using the calculated self-exchange rate for the nickel complex, its reaction with Fe2+(aq) has been examined in terms of an inner- versus outer-sphere mechanism. Key words: nickel(III), pendant-arm macrocycles, hexaaquairon(II), outer sphere, kinetics, Marcus theory.

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