液态DMF中N－14四极耦合常数的实验测定  

Determination of the Quadrupole Coupling Constant of N-14 in Liquid DMF

作　　者：黎明 毛希安[1] 

机构地区：[1]武汉磁共振和原子分子物理国家重点实验室,中国科学院武汉物理研究所

出　　处：《Chinese Journal of Chemical Physics》1995年第1期5-9,共5页化学物理学报（英文）

摘　　要：本文利用质子的１３Ｃ卫星峰与１２Ｃ主峰的弛豫速率之差为纯的偶极偶极机制这一原理，较精确地测定了２５℃时ＤＭＦ分子的取向相关时间．结合分子中Ｎ－１４的四极弛豫时间，得到了液态ＤＭＦ分子中Ｎ－１４核的四极耦合常数为３．４２ＭＨｚ．Abstract In the present paper, the molecular reorientation correlation time of DMF at 298K was accurately determined based on the fact that the difference or the rclaxation rates between the 12C main peak and the 13C satelitc of the aldehyde proton is described by the pure dipole-dipole relaxation mechanism. Having obtained the N-14 quadrupolar relaxahon time and the correlation bine of DMF experimentally, we calculated the N-14 quadrupole coupling constant in liquid DMF. By averaging from different experiments, the result has been found to be 3.42MHz, which is in good agreement with the estimation data in the literature

关 键 词：DMF 耦合常数 氮14 弛豫速率 

分 类 号：O613.61[理学—无机化学] O623.542[理学—化学]