波谱学杂志 ›› 1994, Vol. 11 ›› Issue (2): 181-186.

• 研究论文 • 上一篇    下一篇

大分子中磁偶极弛豫的分离

缪希茄1,2, 胡皆汉1, 韩秀文1   

  1. 1. 中国科学院大连化学物理研究所, 大连 116023;
    2. 中国科学院武汉物理研究所波谱及原子分子物理国家重点实验室, 武汉 430071
  • 收稿日期:1993-02-18 修回日期:1993-04-05 出版日期:1994-06-05 发布日期:2018-01-20

THE SEPARATION OF HETERONUCLEAR DIPOLAR RELAXATION IN MACROMOLECULE

Miao Xijia1,2, Hu Jiehan1, Han Xiuwen1   

  1. 1. Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023;
    2. State key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of physics, The Chinese Academy or
  • Received:1993-02-18 Revised:1993-04-05 Online:1994-06-05 Published:2018-01-20

摘要: 提出采用仅与偶极弛豫有关的13C核同1H核之间的核交叉弛豫速率来考察分子内部运动状况。给出了实际用于考察分子运动状况的关系式,从理论上阐明了本文方法比传统上直接采用常规测定的13C核纵向弛豫时间T1、演向弛豫时间T2及NOE增强因子η来研究分子运动状况的方法要合理。建立了既适用于小分子又适用于大分子自旋系统13C核总自旋弛豫中偶极弛豫分离的公式.

关键词: 大分子, 偶极弛豫, 非偶极弛豫核交叉弛豫速率, 13C核自旋弛豫

Abstract: It is proposed that only the heteronuclear cross relaxation rates between 13C and 1H,which are only dependent on the diporlar relaxation,are used to investigate the mo-lecular internal motions,The new method is more reasonable than the conventional one in theory where the nuclear longitudinal relaxation time T1,transvcrse relaxation T2 and NOE factor η are used to study the molecular internal motions. The general formu-la separating the contribution of dipolar relaxation to the total 13C spin relaxation is set up. It can be applied not only to small molecules inside extreme narrowing condi-tion but also to macromolecules outside extreme narrowing.

Key words: Macromolecule, Dipolar relaxation, Nondipolar relaxation, Nuclear cross relaxation, 13C spin relaxation