摘要
要采用密度泛函B3LYP(Becke,three-parameter,Lee-Yang-Parr)和HF(Hatree-Fock)方法,从理论上探讨了1,3-双(1-苯基-1H-四唑-5-巯基)-乙酰苯腙(DAPHZ)钳形受体对卤素阴离子的识别机理,结果发现DAPHZ受体以其钳形结构中的-N-H基团与卤素阴离子间形成双侧红移氢键进行识别.经BSSE校正后DAPHZ…F^-,DAPHZ…Cl^-和DAPHZ…Br^-体系的分子识别相互作用能ΔE_(CP)分别为-327.5,-163.5和-148.3kJ·mol^(-1),说明钳形DAPHz受体对F^-具有最好的识别能力.此外,采用自然键轨道(NBO)计算,相关H原子化学位移计算及分子中原子(AIM)等理论分析了识别体系中红移氢键的电子结构和性质,结果表明APHZ受体对卤素阴离子的识别能力的相对顺序为DAPHZ…F^->>DAPHZ…Cl^-≈DAPHZ…Br^-.
The recognition mechanism of the 1,3-di (1-phenyl-lH-tetrazole-5-thiol)-acetylphenylhydrazone tweezers receptor (DAPHZ) for the halogen anions was discussed at the density function Becke, three-parameter, Lee-Yang-Parr (B3LYP) and Hatree-Fock (HF) methods. The results showed that recognition mechanism was performed by using red-shift hydrogen bond between N-- H bonds of the DAPHZ and the halogen anions X- (X = F- , C1- and Br- ). The calculated interaction energies (AEcp) with basis set super-position error (BSSE) correction of the three complexes are --327.5,--163.5 and --148. 3 kJmol-1 (HF/3-21G), respectively. Natural bond orbital theory (NBO) analysis, Atoms in molecules (AIM) theory and the chemical shift calculation of the related atoms has been used to investi- gate the electronic structure and properties of the red-shift hydrogen bond between N--H bonds of the DAPHZ and the halogen anions X- , and the results revealed that the relative recognition ability of the DAPHZ tweezer receptor for the halogen anions are in the order of DAPHZ...F-〉〉 DAPHZ...C1-≈ DAPHZ...Br .
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2011年第5期809-815,共7页
Journal of Atomic and Molecular Physics
基金
天水师范学院"青蓝"人才工程基金
国家自然基金(51063006)
教育部重点研究计划(211189)
关键词
分子识别
钳形受体
卤素阴离子
红移氢键
molecular recognition, tweezer receptor, halogen anions, redshift hydrogen bond
作者简介
刘艳芝(1976-),女,河北枣强人,硕士,讲师,主要研究领域为分子模拟与材料化学.E—mail:liuyanzhi@mail.tsnc.edu.cn