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首页> 外文期刊>CHROMATOGRAPHY >Development of a C70-Fullerene Bonded Silica-Monolithic Capillary and Its Retention Characteristics in Liquid Chromatography
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Development of a C70-Fullerene Bonded Silica-Monolithic Capillary and Its Retention Characteristics in Liquid Chromatography

机译：C 70 -富勒烯键合硅胶-单分子毛细管的建立及其在液相色谱中的保留特性

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摘要

In this report, C_(70)-fullerene (C70), which has aspheric structure and greater π electrons compared to C_(60)-fullerene (C60), was effectively immobilized onto the surface of a silica-monolithic capillary, and then the retention characteristics for polycyclic aromatic hydrocarbons (PAHs) due to π-π interaction were evaluated in liquid chromatography (LC). For the immobilization of C70, a C70 derivative via thermal reactive agent, perfluorophenylazide (PFPA) and N -hydroxysuccinimide (NHS) was synthesized. In comparison with a typical thermal reaction in an oil bath and a microwave, the latter reaction provided higher yield. Then, both the C70 and C60 monoliths were evaluated by LC with a variety of PAHs as the solutes. The results suggested that the specific interactions, such as dipole and induced dipole interactions were contributed between the bonded C70 and PAHs. Absorption spectra of PAHs with C60 or C70 and a computer simulation also supported these interactions. Furthermore, the comparison of the separations for PAHs and brominated benzenes with the C70 column and a porous graphite carbon packed column suggested that the interactions based on the polarization of the molecules contributed the separations.
机译：在这份报告中，与非碳原子结构（C60）富勒烯（C60）相比，具有非球面结构和更大π电子的C_（70）-富勒烯（C70）被有效地固定在硅胶整体毛细管的表面，然后在液相色谱（LC）中评估了由于π-π相互作用引起的多环芳烃（PAH）的保留特性。为了固定C70，通过热反应剂，全氟苯叠氮化物（PFPA）和N-羟基琥珀酰亚胺（NHS）合成了C70衍生物。与在油浴和微波中的典型热反应相比，后者反应提供了更高的产率。然后，使用多种PAH作为溶质，通过LC对C70和C60整体材料进行了评估。结果表明，键合的C70和PAHs之间存在特定的相互作用，例如偶极和诱导偶极相互作用。具有C60或C70的PAH的吸收光谱和计算机模拟也支持了这些相互作用。此外，通过C70色谱柱和多孔石墨碳填充塔对PAHs和溴化苯的分离进行的比较表明，基于分子极化的相互作用有助于分离。

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