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首页> 外文期刊>American Journal of Analytical Chemistry >A Study of the Behavior of Alkyl Side Chains Phenols and Arenes in Polar and Nonpolar GC Stationary Phases
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A Study of the Behavior of Alkyl Side Chains Phenols and Arenes in Polar and Nonpolar GC Stationary Phases

机译：极性和非极性气相色谱固定相中烷基侧链苯酚和芳烃的行为研究

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Gas chromatographic measurements of the relative retention times of alkyl-substituted arenes and phenols on capillary columns at temperatures of 125 – 140°C have shown that logarithms of retention times increase bilinearly with the number of carbon atoms in the molecule. It was found that in a high density stationary phase, the longer alkyl side chains of compounds in question are subject to cyclization as a result of the resistance force of this phase affecting molecules during their thermal and diffusion motion. Consequently, common conventional aromatic-aliphatic molecules become new molecules with quasi-alicyclic rings. In comparison with the conventionally conceived molecules, the resulting aromatic–quasi-alicyclic molecules are characterized by rather different, possibly even completely different non-covalent interactions between the molecules, which then affect the retention characteristics. Moreover, cyclization facilitates the mixing of n-alkyl arenes and n-alkyl phenols with high-molecular stationary phases, because the thermodynamic condition for mixing is better fulfilled.
机译：气相色谱法测定的烷基取代的芳烃和苯酚在125 – 140°C的温度下在毛细管柱上的相对保留时间表明，保留时间的对数随分子中碳原子数的增加呈双线性增长。发现在高密度固定相中，由于该相的抗力影响分子在其热运动和扩散运动中的作用，因此所讨论化合物的较长烷基侧链受到环化作用。因此，普通的常规芳族脂族分子成为带有准脂环族环的新分子。与常规构想的分子相比，所得的芳族-半脂环族分子的特征在于分子之间的非共价相互作用相当不同，甚至可能完全不同，从而影响保留特性。此外，环化有利于正烷基芳烃和正烷基苯酚与高分子固定相的混合，因为更好地满足了混合的热力学条件。

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