吉林大学学报(理学版) ›› 2025, Vol. 63 ›› Issue (6): 1784-1794.

• • 上一篇    下一篇

水液相下2α-Ala→Mg2+清除.OH反应的密度泛函理论

姜春旭1, 王佐成2, 赵红迪2, 吴静3, 聂雅琪3, 孙冠军3, 张雪娇1   

  1. 1. 白城师范学院  理论计算中心, 吉林 白城137000; 2. 海南科技职业大学  医药学院,  海口571126; 3. 海南科技职业大学 机电工程学院, 海口 571126
  • 收稿日期:2025-02-13 出版日期:2025-11-26 发布日期:2025-11-26
  • 通讯作者: 王佐成 E-mail:wangzc188@163.com

Density Functional Theory  of  2α-Ala→Mg2+ Scavenging .OH Reaction in Aqueous Phase

JIANG Chunxu1,  WANG Zuocheng2,  ZHAO Hongdi2,  WU Jing3,  NIE Yaqi3,  SUN Guanjun3,  ZHANG Xuejiao1   

  1. 1. Theoretical Computing Center,  Baicheng Normal University,  Baicheng 137000,  Jilin Province, China; 
    2. College of Medicine,  Hainan Vocational University of Science and Technology,  Haikou 571126, China; 3. College of Electrical and Mechanical Engineering,  Hainan Vocational University of Science and Technology,  Haikou 571126,  China
  • Received:2025-02-13 Online:2025-11-26 Published:2025-11-26

摘要: 在M06-2X/6-311+G(d,p)//MN15/6-311++G(3df,2pd)理论水平上, 研究生命体水液相环境(1.013×105 Pa, 310.15 K)条件下2α-Ala→Mg2+(双丙氨酸螯合镁)与羟基自由基(.OH)反应的机理. 考察2α-Ala→Mg2+.OH的提H和加成两个反应通道. 计算结果表明: 提H反应能垒为20.1~62.3 kJ/mol, 均为放热反应; 加成反应能垒为65.7~70.9 kJ/mol,反应少许吸热. 因此, 生命体内2α-Ala→Mg2+易通过输出H原子的方式清除.OH.

关键词: 双丙氨酸螯合镁, 羟基自由基, 自洽反应场理论, 密度泛函理论, 自由能垒

Abstract: We studied  the mechanism of the reaction between 2α-Ala→Mg2+ (bis-alanine chelating magnesium)  and  .OH (hydroxyl radical) in the aqueous phase environment of living organisms (1.013×105 Pa,  310.15 K) at the level of M06-2X/6-311+G(d,p)//MN15/6-311++G(3df,2pd)  theory, and investigated two reaction channels of  2α-Ala→Mg2+ and .OH for the hydrogen abstraction and addition. The calculation results show   that the energy barrier for the hydrogen abstraction reaction is from 20.1 to 62.3 kJ/mol,  all of which are exothermic reactions. The energy barrier for the addition reaction is from 65.7 to 70.9 kJ/mol,  with a slight endothermic reaction. Therefore,  2α-Ala→Mg2+ in living organisms can easily scavenge .OH by abstracting H atoms.

Key words: bis-alanine chelating magnesium,  , hydroxyl radical,  ,  , self-consistent reaction field theory,  , density functional theory, free energy barrier

中图分类号: 

  • O641.12