期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
一类单氟代三联苯液晶化合物氟原子朝向对质谱碎片的影响及异构体的分离
- 阜阳欣奕华材料科技有限公司 品质部, 安徽 阜阳 236000
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DOI：10.13763/j.cnki.jhebnu.nse.2019.05.008
Effect of Fluorine Atom Orientation of Single-fluoro Terphenyl Liquid Crystal Compounds on Mass Spectrometry Fragments and Separation of Isomer
摘要/Abstract
为了确定氟朝向对一类单氟代三联苯液晶单体质谱碎片的影响，利用气相色谱-质谱联用仪（GC-MS）和NMR对6种单氟代三联苯液晶单体进行了分析.实验结果表明：氟原子朝向的差异影响特征裂解碎片的丰度，氟原子对于相同朝向的烷基断裂峰有正向作用；相反，通过H1/H2数值可以判断异构体的氟原子朝向.同时做了2组单氟代三联苯化合物及异构体的分离研究，在液相手性柱条件下，异构体得到了很好分离.该试验可以为此类液晶材料的分析及定性提供参考.
In order to determine the effect of fluorine atom orientation on the mass spectrometry fragments of single-fluoro triphenyl liquid crystal monomers,six single-fluoro triphenyl liquid crystal monomer compounds' qualitative researches have been conducted with gas chromatography-mass spectrometry (GC-MS) and NMR.The experimental results show that the difference in the fluorine atom orientation affect the abundance of the cracked fragments,and the positive effects are contributed to alkyl cleavage peaks which have the same orientation with fluorine atom.Conversely,the fluorine atom orientation can be judged by the H1/H2 value between isomers.At the same time,two groups single-fluoro triphenyl compounds and its isomers' separation researches have been performed with HPLC method.Under the condition of liquid chiral column,the isomers can be well separated.This experiment has a great reference meaning for the qualitative analysis of such liquid crystal materials.
关键词
参考文献 11
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