This article describes the effect of modification with organic bases such as uracil () and polyethyleneimine () on the adsorption and chromatographic properties of poly(1-trimethylsilyl-1-propyne) () used as a stationary phase () in packed and capillary columns. It was shown that the sorbents prepared on the basis of diatomite Chromosorb P NAW support and successively modified with 9 wt.% PTMSP and 1 wt.% U (or PEI) (PC-U and PC-PEI samples, respectively), have a mesoporous structure. The IR spectrum shows the presence of carbonyl groups in the sorbent modified with uracil. The impregnation of the sorbent with a polyethyleneimine solution leads to the appearance in the spectrum of bands characterizing NH stretching and bending vibrations, as well as a band at 1310 cm which can be attributed to CN bond vibrations. The chromatographic properties of the studied sorbents differ significantly from the properties of the initial PTMSP. Packed columns PC-U and PC-PEI, as well as capillary columns with a polyethyleneimine-modified PTMSP layer, allow one to selectively separate mixtures of polar and non-polar compounds and structural isomers of hydrocarbons. Methanol on these columns is eluted in the form of a symmetrical peak separately from propane, propylene and other associated hydrocarbon impurities in commercial (technical, target) n-butane.

中文翻译：

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有机碱改性聚(1-三甲基硅基-1-丙炔)色谱柱的性能

本文介绍了尿嘧啶 () 和聚乙烯亚胺 () 等有机碱修饰对填充柱和毛细管柱中用作固定相 () 的聚(1-三甲基硅基-1-丙炔) () 的吸附和色谱性质的影响。结果表明，基于硅藻土 Chromosorb P NAW 载体制备并相继用 9 wt.% PTMSP 和 1 wt.% U（或 PEI）（分别为 PC-U 和 PC-PEI 样品）改性的吸附剂具有介孔结构。红外光谱显示尿嘧啶改性的吸附剂中存在羰基。用聚乙烯亚胺溶液浸渍吸附剂会导致光谱中出现表征 NH 伸缩和弯曲振动的谱带，以及 1310 cm 处的谱带，该谱带可归因于 CN 键振动。所研究的吸附剂的色谱特性与初始 PTMSP 的特性显着不同。填充柱 PC-U 和 PC-PEI 以及带有聚乙烯亚胺改性 PTMSP 层的毛细管柱可以选择性分离极性和非极性化合物的混合物以及碳氢化合物的结构异构体。这些柱上的甲醇以对称峰的形式与商业（技术、目标）正丁烷中的丙烷、丙烯和其他相关烃杂质分开洗脱。