制备两种基于聚 (乙烯) 改性基色谱静止相和分子形状识别的形状受限异构体的两形状树突型小分子凝器
Lan Ma1, Yuanyuan Li1, Le Shang1
1State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
Journal of chromatography. A
|August 23, 2024
概括
使用聚乙烯 (arylene ether) 树突体的新型基于的静止相提供了像PAHs和PCBs这样的形状受限异构体的优越分离. 与商业选择相比,这些新型HPLC列提供了增强的选择性和性能.
科学领域:
- 分离科学 分离科学
- 染色体学 染色体学 是一种染色学.
- 材料科学 材料科学 材料科学
背景情况:
- 具有相似物理化学性质的异构体的分离,特别是几何异构体,由于它们的相似极性和不同的分子形状,具有挑战性.
- 开发先进的静止相对于实现异构体分离的高选择性至关重要.
- 基于聚 (乙烯) 的树突体提供独特的多功能分支结构和适合染色学应用的自我组装特性.
研究的目的:
- 合成和描述两种基于聚 (乙烯) 的两性双胞胎树突性有机小分子凝剂PAE-ANT和PAE-PA.
- 将这些剂固定在二氧化表面上,以创建新的高性能液态染色学 (HPLC) 静止相 (SiO2@PAE-ANT和SiO2@PAE-PA).
- 评估这些新的静态相的分子形状选择性和分离性能,用于各种形状受限的异构体和极性化合物.
主要方法:
- 合成基于聚 (乙烯) 的树突性有机小分子凝剂 (PAE-ANT和PAE-PA).
- 这些剂与二氧化表面的结合形成SiO2@PAE-ANT和SiO2@PAE-PA静止相.
- 这些相作为HPLC列的应用,用于在HILIC模式下分离非极性异构体 (PAHs,PCBs,托科菲醇,胡卜素),几何性异构体 (乙乙醇),极性化合物 (烯酸,烯酸) 和强极性化合物 (核化物,核基).
主要成果:
- 无论SiO2@PAE-ANT和SiO2@PAE-PA都表现出高分子形状选择性,用于非极性形状受限异构体和几何异构体.
- 与商业C18和列相比,这些新型列表现出优异的分离性能和更灵活的选择性.
- SiO2@PAE-ANT对非极性异构体的线性选择性略高于SiO2@PAE-PA,这归因于有序的空间结构和多个弱相互作用中心 (疏水性,疏水性,结合,π-π相互作用).
结论:
- 树突性有机小分子凝器在二氧化表面的有序凝,结合多种相互作用,是分离形状受限异构体的关键.
- 在SiO2@PAE-ANT和SiO2@PAE-PA阶段的集成和有序的功能组是它们高分子形状选择性的主要驱动因素.
- 修改树突性有机小分子凝器的结构和功能组,可以调整分子定向,识别能力和形状受限异构体的分离机制.
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