Zero valent iron as an electron transfer agent in a reaction system based on zero valent iron/magnetite nanocomposites for adsorption and oxidation of Sb(III)

2018 ◽  
Vol 85 ◽  
pp. 155-164 ◽  
Author(s):  
Weibin Li ◽  
Fenglian Fu ◽  
Zecong Ding ◽  
Bing Tang
Keyword(s):  
Electron Transfer ◽  
Reaction System ◽  
Zero Valent Iron

Cysteine-enhanced reductive degradation of nitrobenzene using nano-sized zero-valent iron by accelerated electron transfer

2021 ◽  
Vol 100 ◽  
pp. 110-116
Author(s):  
Yuanming Peng ◽  
Yunsong Mu ◽  
Chao Xue ◽  
Anwei Chen ◽  
Liang Peng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Zero Valent Iron ◽  
Reductive Degradation

A novel radical polymerization system initiated by a redox reaction with NHPI and xanthone

2017 ◽  
Vol 8 (41) ◽  
pp. 6356-6361 ◽  
Author(s):  
Xu Yan ◽  
Lihua Zhang ◽  
Qian Liu ◽  
Guan Wang ◽  
Xiaofei Liu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Radical Polymerization ◽  
Redox Reaction ◽  
Transfer Reaction ◽  
Reaction System ◽  
Electron Transfer Reaction ◽  
Polymerization System

A novel redox reaction system consisting of xanthone (XT) andN-hydroxyphthalimide (NHPI) for radical polymerization is developed where NHPI and XT experience a one-electron-transfer reaction, which produces two kinds of radicals, PINO radicals and cycloketyl (CK) radicals.

scholarly journals Customized exogenous ferredoxin functions as an efficient electron carrier

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Zhan Song ◽  
Cancan Wei ◽  
Chao Li ◽  
Xin Gao ◽  
Shuhong Mao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Protein Interactions ◽  
Reaction System ◽  
Protein Protein Interactions ◽  
Electron Transfer Process ◽  
Potential Measurement ◽  
Electron Carrier ◽  
Electron Transfer Pathway ◽  
Biological Electron Transfer

AbstractFerredoxin (Fdx) is regarded as the main electron carrier in biological electron transfer and acts as an electron donor in metabolic pathways of many organisms. Here, we screened a self-sufficient P450-derived reductase PRF with promising production yield of 9OHAD (9α-hydroxy4-androstene-3,17-dione) from AD, and further proved the importance of [2Fe–2S] clusters of ferredoxin-oxidoreductase in transferring electrons in steroidal conversion. The results of truncated Fdx domain in all oxidoreductases and mutagenesis data elucidated the indispensable role of [2Fe–2S] clusters in the electron transfer process. By adding the independent plant-type Fdx to the reaction system, the AD (4-androstene-3,17-dione) conversion rate have been significantly improved. A novel efficient electron transfer pathway of PRF + Fdx + KshA (KshA, Rieske-type oxygenase of 3-ketosteroid-9-hydroxylase) in the reaction system rather than KshAB complex system was proposed based on analysis of protein–protein interactions and redox potential measurement. Adding free Fdx created a new conduit for electrons to travel from reductase to oxygenase. This electron transfer pathway provides new insight for the development of efficient exogenous Fdx as an electron carrier. Graphical Abstract

The significant role of electron donating capacity and carbon structure of biochar to electron transfer of zero-valent iron

Chemosphere ◽  
2021 ◽  
pp. 132381
Author(s):  
Yangfan Yuan ◽  
Min Zhou ◽  
Jun Shi ◽  
Changai Zhang ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Significant Role ◽  
Zero Valent Iron ◽  
Carbon Structure

DYNAMIC THEORY OF ELECTRON TRANSFER PROCESS

1988 ◽  
Vol 02 (05) ◽  
pp. 743-752
Author(s):  
YIN ZHEN
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Transition Probability ◽  
Reaction System ◽  
Heat Bath ◽  
Initial State ◽  
Electron Transfer Process ◽  
Electron States ◽  
Adiabatic Electron Transfer ◽  
Electron Stimulated Desorption

Based on time-dependent Hartree-Fork approximation, we have developed a new technique for dealing with non-adiabatic electron transfer process and also obtained the formula for finding consistently the effective adiabatic parameter and the transition probability. Comparing to Landau-Zener theory our results indicate that the transition probability is greatly influenced by the coupling between the electron and the heat-bath. As the initial state of the electron is in the ground state, interaction between the electron and the heat-bath reduces the transition probability between the electron states. This can be explained that the transition probability from covalent to ionic state in a solute reaction system goes down due to the influence of the solvent. As the initial state of the electron is in the excited state, the coupling to the heat-bath acts to enhance the transition probability between the electron states. This can elucidate that desorption probability decreases in the process of the electron stimulated desorption in virtue of the heat-bath.

Effect of pH on PCP Remediation by Smectite Supported Pd / Fe

2013 ◽  
Vol 634-638 ◽  
pp. 3071-3074
Author(s):  
Bing Tao Liu ◽  
Guang Yu Zhu ◽  
Jia Yi Pu
Keyword(s):  
Reaction Rate ◽  
Ph Value ◽  
Reaction System ◽  
Reaction Rate Constant ◽  
Zero Valent Iron ◽  
Iron Corrosion ◽  
Effect Of Ph ◽  
The Difference ◽  
Dechlorination Reaction ◽  
Supported Pd

Due to its influence on iron corrosion and involvement in dechlorination reaction, the concentration of H+ is crucial to the reactivity and efficiency of nanosized Pd /Fe. In this study, PCP dechlorination by smectite-templated Pd/Fe was studied and the effect of pH on PCP dechlorination was investigated in detail. The reaction rate constant is critically dependant on the reaction pH over the range 6.0~10.0. The dechlorination rate increases rapidly with decreasing the reaction pH value when the pH is 6.0~8.0. The rate change is up to 3.346 folds with decreasing of per pH unit while it decreases down to 0.3338 when pH is in the range 8.0~10.0. The reductive efficiency of zero-valent iron (ZVI) was further investigated by spiking excess PCP in the reaction system. The maximal reaction efficiency of ZVI for PCP dechlorination attains to 78% when pH is 9.0. The difference between the dechlorination rate and reductive efficiency with respect to reaction pH suggest that ZVI could not be effectively utilized to reduce PCP under acidic condition.

scholarly journals Chromium–Salen Complex / Nitroxyl Radical Cooperative Catalysis:A New Combination for Aerobic Intramolecular Dearomative Coupling of Phenols

2020 ◽  
Author(s):  
Shota Nagasawa ◽  
Shogo Fujiki ◽  
Yusuke Sasano ◽  
Yoshiharu Iwabuchi
Keyword(s):  
Electron Transfer ◽  
Catalytic System ◽  
Good Yield ◽  
Nitroxyl Radical ◽  
Reaction System ◽  
Coupling Reaction ◽  
New Combination ◽  
Mechanistic Study ◽  
Reaction Conditions ◽  
Salen Complex

Herein we describe an aerobic intramolecular dearomative coupling reaction of phenols using a catalytic system with the combination of a chromium–salen (Cr–salen) complex and a nitroxyl radical. This novel catalytic system enables the construction of a spirocyclic dienone product, which is a potentially useful intermediate for the synthesis of various natural products such as alkaloids and phenylpropanoids from bisphenol in good yield under mild reaction conditions (under O2 and ambient temperature). A preliminary mechanistic study suggests that this reaction system is promoted by a cooperative electron transfer between the Cr(III)–salen complex, nitroxyl radical and bisphenol substrate.

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