N-Acetylcysteine versus arsenic poisoning: A mechanistic study of complexation by molecular spectroscopy and density functional theory

2021 ◽  
pp. 117168
Author(s):  
Moumita Das ◽  
Keshav Kumar Singh ◽  
Eram Khan ◽  
Rajeev K. Sinha ◽  
Ranjan K. Singh ◽  
...  
2020 ◽  
Vol 19 (07) ◽  
pp. 2050025
Author(s):  
Nadjet Deddouche ◽  
Hafida Chemouri

A comparative theoretical study of the kinetics of the Diels–Alder (DA) reaction between empty fullerene (C[Formula: see text]) and lithium ion encapsulated fullerene ([Formula: see text]) with 1,3 cyclohexadiene (C[Formula: see text]H[Formula: see text]) was carried out. This reaction takes place in a photovoltaic cell. The effect of the encapsulated [Formula: see text] ion on the conversion rate of solar energy into electricity has been highlighted through calculations based on the density functional theory (DFT). In addition, a static study using the global conceptual DFT indices, as part of the demonstration of the significant electrophilic power of the fullerene nanostructure, was carried out to show the effect of encapsulating the [Formula: see text] ion in this nanoparticle on the electrophilic power of Li[Formula: see text]@C[Formula: see text] and therefore on the acceleration of the reaction. The relationship between the HOMOdonor–LUMOacceptor energy difference and the DA reaction acceleration, and therefore the acceleration of light conversion (a rapid conversion implies a small gap), has been thoroughly examined. Moreover, a mechanistic study of the kinetics of the DA reaction of the fullerene involved in an organic photovoltaic cell has been carried out. In this section, a concerted synchronous mechanism with no effect of [Formula: see text] encapsulation on the synchronicity of the reaction was observed. Finally, it was revealed that Li[Formula: see text]@C[Formula: see text] reacted approximately 2466 times faster than C[Formula: see text]. Moreover, the experimental results were found in good agreement with the computer calculations.


2010 ◽  
Vol 321 (1-2) ◽  
pp. 83-91 ◽  
Author(s):  
Shaofeng Yang ◽  
John Adjaye ◽  
William C. McCaffrey ◽  
Alan E. Nelson

RSC Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 4014-4021 ◽  
Author(s):  
Liang Pu ◽  
Zhong Zhang ◽  
Qian-shu Li ◽  
R. Bruce King

The reaction of (MePPh2)4WCl2 with C3O2 results in stepwise cleavage of the two CC double bonds in C3O2 to give tungsten complexes containing phosphinoketenylidene and phosphinocarbyne ligands. The mechanism of this has been elucidated using density functional theory.


2016 ◽  
Vol 55 (6) ◽  
pp. 2855-2863 ◽  
Author(s):  
Junling Meng ◽  
Xiaojuan Liu ◽  
Congting Sun ◽  
Chuangang Yao ◽  
Lifang Zhang ◽  
...  

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