Dynamic isotope effects on relaxation of quadrupolar nuclei in 12 simple organic molecules

作     者：毛希安 andM.Holz 

作者机构：Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics Chinese Academy of Sciences Wuhan 430071 China Institur fuer Physikalishe Chinese und Elektrochemie der Universitaet Karlsruhe 75000 Karlsruhe Bundesrepublik Deutschland 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：1995年第38卷第4期

页      面：393-400页

核心收录：

学科分类：0810[工学-信息与通信工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070303[理学-有机化学] 0703[理学-化学] 0704[理学-天文学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project supported by the Alexander von Humboldt-Foundation of Germany and the Chinese Academy of Sciences 

主　　题：relaxation of quadrupolar nuclei isotope effect molecular motions moment of inertia. 

摘      要：Dynamic isotope effects on relaxation rate of quadrupolar nuclei are preliminarily reported. The relaxation rates of 17O and 14N in 12 simple organic molecules and their 18 corresponding deuterated species have been systematically measured. The principal components of the molecular inertia tensors have been calculated. The results show that there is an intrinsic correlation between the dynamic isotope effects of the relaxation rate and the static isotope effects of the molecular inertia. The concepts of molecular collision frequency and translation-rotation coupling have been introduced into the NMR relaxation theory. Therefore, a reasonable explanation of the experimental results has been given.