Retention characteristics of alkylated polycyclic aromatic hydrocarbons in normal phase liquid chromatography
Retention characteristics of alkylated polycyclic aromatic hydrocarbons in normal phase liquid chromatography
复制标题
烷基化多环芳烃在正相液相色谱中的保留特性
DOI：
10.1007/bf02311523
复制
发表时间：
1988
期刊：
影响因子：
1.7
通讯作者：
A. Colmsjö
中科院分区：
文献类型：
--
作者：
C. Östman;A. Colmsjö
用硅胶、氨丙基改性硅胶和氰丙基改性硅胶研究了苯和芘的多甲基和单正烷基衍生物以及多环芳烃（PAH）的保留特性。研究的化合物组的选择性的差异被发现之间的三个阶段。在甲基系列中，观察到log（k′）与碳数关系图中的线性行为偏离。这些被解释在芳香环系统内的π-电子离域的差异。此外，甲基取代对选择性的影响随着芳环数目的增加而降低。得到的结果表明，在正相模式下使用的氰基柱中的主要吸附位点，至少对于PAH分子，是氰基。
Retention characteristics of series of polymethyl and mono-n-alkyl derivatives of benzene and pyrene, and also of parent polycyclic aromatic hydrocarbons (PAH), were studied using silica and aminopropyl- and cyanopropyl-modified silica. Differences in the selectivities for the studied compound groups were found between the three phases. Deviations from linear behaviour in plots of log (k′)vs. carbon number were observed for the methyl series. These are explained in terms of differences in π-electron delocalisation within the aromatic ring systems. Further, the effect of methyl substitution on selectivity decreased with an increasing number of aromatic rings. Results were obtained which indicated that the primary adsorption site in a cyano column used in normal phase mode, at least for PAH molecules, is the cyano group.