【作者】 李临生； 张丽娜； 兰云军； 熊静；

【Author】 LI Lin-sheng ZHANG Li-na, LAN Yun-jun, XIONG Jing (Key Laboratory of Leather, Zhejiang Province, Wenzhou University, Wenzhou 325027), LI Lin-sheng and ZHANG Li-na (Institute of Applied Chemistry, Shaanxi University of Science and Technology, Xianyang 712081)

【机构】 温州大学浙江省皮革重点实验室；

【摘要】 15N的天然丰度比13C低,其相对灵敏度为质子的0．19％,为13C的 2．1％;15N磁矩为-0．28304;核磁共振范围宽,其δ范围达800以上,15N NMR 化学位移和14N的基本一致;15N-NMR比13C对环境因素则更为敏感、复杂,氮谱对取代基的敏感性约为碳谱的2倍左右;氮的驰豫时间比13C长4～5倍;由1H 核引起的15N共振峰裂分符合n+1规则,1JNH比较大;NOE最大值可达到 -4．933;介绍了各类含氮化合物的15N-NMR化学位移的范围。更多还原

【Abstract】 The characteristics of 15N - NMR were summarized. The natural abundance of 15N is lower than13C and its relative sensitivity is 0.19% of 1H, and 2.1% of 13C, magnetic moment of 15N is -0.28304, so the resonance peaks of 15N are weak. The chemical shifts of 15N - NMR and 14N - NMR are almost identical, 15N -NMR spectrum extend over 800 ppm. 15 N - NMR is sensitive to environmental factors, the sensitivity of 15 N to substituent effect is about 2 times as 13 C. The relaxation period of 15 N is about 4 ~ 5 times as 13 C. The coupling constants 1 J NH are prominent. The NOE maximum of 15N- NMR can reach to -4.933. The ranges of 15N - NMR chemical shifts of various nitrogen compounds were presented.更多还原