几种咔唑衍生物(有机光导材料)的13C核磁共振谱的研究

我们测定了3-溴咔唑,3,6二溴咔唑,9-(2',3'-环氧丙基)咔唑,9-(2',3'-环氧丙基)-3-溴咔唑和9-(2',3'-环氧丙基)-3,6-二溴咔唑(后分别简称化合物1,2,3,4,5)的宽带去偶谱、偏共振谱和非去偶谱。通过对它们的¹³C核磁共振谱的数据分析比较,就以下几方面进行了归纳总结:①信号的归属方法;②环氧丙基的¹³C化学位移范围;③偶合常数的范围,这些归纳总结有助于确定此类化合物的价键特征和结构。

13C NMR RESEARCHES OF SEVERAL CARBAZOLE DERIVATIVES (ORGANIC PHOTOCONDUCTOR MATERIAL)

In this paper the ¹³C NMRresearch of 3-bromo-carbazole, 3,6-dibro-mo-carbazole, 9-(2',3'-epoxypropyl) carbazole, 9-(2',3'-epoxypropyl)-3-bromo-carbazole and 9-(2',3'-epoxypropyl)-3, 6-dibromo-carbazole has been made.The proton noise decoupled, proton off-resonance decoupled and ¹³C-¹Hcoupled NMRspectra for five carbazole derivatives are measured. The ¹³C NMRspectra data of them are analysed and compared. The following, points are summarized: (1) assignment methods of the resonance signals in¹³C NMR; (2) chemical shift range of epoxypropyl; (3) the range of coupling constants. The points described may be useful for determining valence bond characteristic and structure of these compounds.The experimental results show that carbon-13 chemical shifts, one-bond coupling and two-bond coupling constants of carbazole derivatives have fixed regularity. Therefore, they not only provide a powerful basis for determining structure but also bear some significance for study of ¹³C NMRof carbazole derivatives and complexes.