新型含氟液晶类化合物的质谱研究

Mass Spectra of Some New Fluorinated Liquid Crystals

本文报道66个新型含氟液晶类化台物的电子轰击电离质谱(EIMS)。66个化台物分为三个类型,即炔醚类、炔酯类和炔类.并利用MS/MS联用技术和高分辨质谱(HRMS)数据研究了三种不同类型化合物的裂解机理,并总结其觇律性,结果将有助于未知的类似化合物的结构鉴定。

The EI mass spectra of sixty-six new fluorinated liquid crystal compounds, including three types, were studied. The fragmentation mechanism has been discussed. The results may be summarized as follows: for type A, the C-O bond cleavage of centric bridge occurred predominatly leading to formation of the ion which was very easy to lose CnH2n; for type B, the α-cleavage of the centric bridge carbonyl gave the characteristic ion and for type C, they all showed strong molecular ion peaks, the fragmentation pathways of the latter were very simple.