New catalytic systems for the fixation of carbon dioxide. 1. Copolymerization of carbon dioxide and propylene oxide with new rare-earth catalysts-RE(P204)3-Al(i-Bu)3-R(OH)n

1991 ◽  
Vol 24 (19) ◽  
pp. 5305-5308 ◽  
Author(s):  
Xianhai Chen ◽  
Zhiquan Shen ◽  
Yifeng Zhang
Keyword(s):  
Carbon Dioxide ◽  
Rare Earth ◽  
Propylene Oxide ◽  
Catalytic Systems ◽  
Fixation Of Carbon Dioxide

scholarly journals COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE UNDER in-situ SUPPORTED RARE EARTH TERNARY CATALYST

2012 ◽  
Vol 012 (4) ◽  
pp. 446-452 ◽  
Author(s):  
Hongwei LU ◽  
Yusheng QIN ◽  
Xianhong WANG ◽  
Xiaojiang ZHAO ◽  
Fosong WANG
Keyword(s):  
Carbon Dioxide ◽  
Rare Earth ◽  
Propylene Oxide ◽  
Ternary Catalyst

Copolymerization of carbon dioxide and propylene oxide under inorganic oxide supported rare earth ternary catalyst

2011 ◽  
Vol 49 (17) ◽  
pp. 3797-3804 ◽  
Author(s):  
Hongwei Lu ◽  
Yusheng Qin ◽  
Xianhong Wang ◽  
Xiangguang Yang ◽  
Suobo Zhang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Rare Earth ◽  
Propylene Oxide ◽  
Inorganic Oxide ◽  
Ternary Catalyst

Atom Condensed Fukui Function for Condensed Phases and Biological Systems and Its Application to Enzymatic Fixation of Carbon Dioxide

2019 ◽  
Author(s):  
Javier Oller ◽  
David A. Sáez ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Molecular System ◽  
Chemical Reactivity ◽  
Nucleophilic Attack ◽  
Stable Conformation ◽  
Fukui Functions ◽  
Reactivity Descriptors ◽  
Dynamics Simulations ◽  
Fixation Of Carbon Dioxide

<div><div><div><p>Local reactivity descriptors such as atom condensed Fukui functions are promising computational tools to study chemical reactivity at specific sites within a molecule. Their applications have been mainly focused on isolated molecules in their most stable conformation without considering the effects of the surroundings. Here, we propose to combine QM/MM Born-Oppenheimer molecular dynamics simulations to obtain the microstates (configurations) of a molecular system using different representations of the molecular environment and calculate Boltzmann weighted atom condensed local reac- tivity descriptors based on conceptual DFT. Our approach takes the conformational fluctuations of the molecular system and the polarization of its electron density by the environment into account allowing us to analyze the effect of changes in the molecular environment on reactivity. In this contribution, we apply the method mentioned above to the catalytic fixation of carbon dioxide by crotonyl-CoA carboxylase/reductase and study if the enzyme alters the reactivity of its substrate compared to an aqueous solution. Our main result is that the protein en- vironment activates the substrate by the elimination of solute-solvent hydrogen bonds from aqueous solution in the two elementary steps of the reaction mechanism: the nucleophilic attack of a hydride anion from NADPH on the α, β unsaturated thioester and the electrophilic attack of carbon dioxide on the formed enolate species.</p></div></div></div>

scholarly journals MECHANISM OF FIXATION OF CARBON DIOXIDE IN THE KREBS CYCLE

1941 ◽  
Vol 139 (1) ◽  
pp. 483-484
Author(s):  
H.G. Wood ◽  
C.H. Werkman ◽  
Allan Hemingway ◽  
A.O. Nier
Keyword(s):  
Carbon Dioxide ◽  
Krebs Cycle ◽  
Fixation Of Carbon Dioxide
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