摘要
近年来已有二百多种液晶气相色谱固定液,用来分离各种异构体.国内研究较多的是芳羧酸酯类液晶,用来分离各种二元取代苯异构体.我们也用此类液晶色谱柱分离了一些芳香族化合物的异构体.为了改进这类液晶固定液的性能,我们曾把极性基团引入这类液晶分子的对苯二酚环上,发现引入一个邻位溴原子,对二元取代苯异构体有较好的分离性能.为了进一步研究这类含溴的芳羧酸酯类液晶,把液晶分子两端的烷氧基碳数增加,并把它们涂在玻璃毛细管柱上,研究它们对二甲苯、甲酚的二元取代异构体的分离性能.
Four new liquid erystalline aryl diesters,bromo-p-hydroquinoldi-(p-n-alkoxy-benzoate)homologes,in which the alkyl group is n-amyl,hexyl,heptyl and octyl,are used as GC stationary phases coated on glass capillary columns.Separation of isomeric xylenes,cresols and xylenols on these columns was studied.Relative retention of these isomers was determined and it seems that bromo-p-hydroquinol di-(p-a nyloxybenzoate)is a better phase for the above separations,although the four liquid crystals all show satisfactory separation of isomeric xylenes and cresols.
出处
《化学学报》
SCIE
CAS
1985年第2期195-198,共4页
Acta Chimica Sinica
