LI Bin,LIU Fang,ZHANG Xuejiao,et al.Theoretical study on the chiral flip of amphoteric lysine molecule catalyzed by hydroxyl anion in water-liquid phase environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(02):73-82.
LI Bin,LIU Fang,ZHANG Xuejiao,et al.Theoretical study on the chiral flip of amphoteric lysine molecule catalyzed by hydroxyl anion in water-liquid phase environment[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(02):73-82. DOI: 10.13471/j.cnki.acta.snus.2022C006.
Theoretical study on the chiral flip of amphoteric lysine molecule catalyzed by hydroxyl anion in water-liquid phase environment
Using M06-2X and MN15 methods of density functional theory, combining with SMD model method of self consistent reaction field theory, the chiral flip of amphoteric lysine molecule catalyzed by hydroxyl anion in water-liquid phase environment was investigated. The study of reaction process shows that through the process of extracting
α
-H proton from hydroxyl anion water clusters and extracting H proton of water clusters from carbanion
α
-C, lysine molecules could achieve chiral flip. The potential energy surface shows that the energy barrier of the lysine molecules chiral flip rate-determining step is between 51.1 kJ/mol and 59.9 kJ/mol when the clusters of hydroxyl anion water molecules interact with
α
-H and carbonyl O hydrogen bonds; the energy barrier of the lysine molecules chiral flip rate-determining step is between 52.8 and 58.0 kJ/mol when the clusters of hydroxyl anion water molecules interact with
α
-H and amino group N hydrogen bonds, they are much lower than the energy barrier 110 kJ/mol of chiral flip of amphoteric lysine molecule in water-liquid phase environment. The results show that the hydroxyl anions play a catalytic role on the chiral flip of lysine molecules in water-liquid phase environment, alkaline environment is insalubrious.
关键词
赖氨酸手性反转密度泛函理论自洽反应场理论过渡态能垒
Keywords
lysinechiral flipdensity functional theoryself consistent reaction field theorytransition stateenergy barrier
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