Kinetics and mechanism of bimolecular electron transfer reaction in quinone-amine systems in micellar solution

2005 ◽  
Vol 122 (8) ◽  
pp. 084512 ◽  
Author(s):  
Manoj Kumbhakar ◽  
Sukhendu Nath ◽  
Tulsi Mukherjee ◽  
Haridas Pal
Keyword(s):  
Electron Transfer ◽  
Micellar Solution ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Kinetics And Mechanism

scholarly journals Kinetics and Mechanism of Electron Transfer Reaction of an Adipato Bridged Iron(III)-Salen Complex with Dithionite Ion in Perchloric Acid Medium

2015 ◽  
Vol 88 (3) ◽  
pp. 259-266 ◽  
Author(s):  
Pius O. Ukoha ◽  
Simeon Atiga ◽  
Oguejiofo T. Ujam ◽  
Jonnie N. Asegbeloyin ◽  
Obinna C. Okpareke ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Acid Medium ◽  
Perchloric Acid ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Kinetics And Mechanism ◽  
Salen Complex ◽  
Dithionite Ion

Studies on Kinetics and Mechanism of the Oxidation of Cobalt(Iii) Bound And Unbound Alpha - Hydroxy Acids By Tetramethylammonium Chlorochromate

2015 ◽  
Vol 2 (2) ◽  
pp. 64-69
Author(s):  
Dayanandhan1.R ◽  
Subramani.K
Keyword(s):  
Electron Transfer ◽  
Hydroxy Acid ◽  
Transfer Reaction ◽  
Bond Cleavage ◽  
Electron Transfer Reaction ◽  
Kinetics And Mechanism ◽  
Hydroxy Acids ◽  
Intermediate Radical ◽  
Alpha Hydroxy Acids ◽  
Kinetics Of

The kinetics of induced electron transfer reaction has been attempted presently with Tetra Methyl Ammonium Chloro Chromate (TMACC) and pentaammine cobalt (III) complexes of α-hydroxy acid in the presence of micelles. The Tetra Methyl Ammonium Chloro Chromate (TMACC) oxidizes cobalt (III) bound and unbound α-hydroxy acids. In Tetra Methyl Ammonium Chloro Chromate (TMACC) induced electron transfer in the complex, the intermediate radical formed dissociates in a nearly synchronous C-C bond cleavage and the rest of it proceeding with C-H fission yielding cobalt (III) complex. With increase in surfactant Sodium Lauryl Ethersulphate (SLES) concentration, an increase in the rate was observed.

FT-EPR Study of Spin-correlated Radical Pairs Formed by Electron Transfer Quenching of Porphyrin Triplets in Micellar Solution

1998 ◽  
Vol 02 (04) ◽  
pp. 353-361 ◽  
Author(s):  
VOLKER WEIS ◽  
HANS VAN WILLIGEN
Keyword(s):  
Electron Transfer ◽  
Statistical Model ◽  
Rate Constant ◽  
Micellar Solution ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Cetyltrimethylammonium Chloride ◽  
Radical Pairs ◽  
Homogeneous Solutions ◽  
Kinetics Of

The spin-correlated radical pairs (SCRPs) formed by photoinduced electron transfer from zinc tetrakis(4-sulfonatophenyl)porphyrin ( ZnTPPS ) to quinones in micelles of the cationic surfactant cetyltrimethylammonium chloride ( CTAC ) were studied by means of Fourier transform EPR (FT-EPR). It is shown that variation of the power of the microwave pulse allows the separation of EPR signals arising from SCRPs and free radicals. The measured kinetics of radical formation can be accounted for in terms of a statistical model taking into account the non-uniform distribution of the solutes over the micelles. The rate constant of electron transfer quenching (kq) of the ZnTPPS triplet state by duroquinone (DQ) is found to be 1.05 × 106 s−1. The FT-EPR measurements gave information also on the kinetics of the homogeneous electron transfer reaction DQ − + DQ → DQ + DQ − in CTAC solution in which the DQ − anion radicals were generated by light-induced electron transfer from ZnTPPS . It is found that the dependence of the rate of this reaction on quinone concentration deviates from the linear relationship found in homogeneous solutions. A statistical model is proposed to account for the data. Based on this model, the rate constant of the self-exchange reaction (k ex ) is 4.1 × 106 s−1. From results obtained with duroquinone and benzoquinone as acceptors, it is concluded that ZnTPPS is located at the micelle/water interface.

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