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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Polyethyleneimine-functionalized carbon dots and their precursor co-immobilized on silica for hydrophilic interaction chromatography
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Polyethyleneimine-functionalized carbon dots and their precursor co-immobilized on silica for hydrophilic interaction chromatography

机译：聚乙烯亚胺官能化的碳点及其前体在二氧化硅上进行亲水性相互作用色谱法

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摘要

A new strategy based on synergistic effect of the carbon dots and their precursor was proposed to enhance the selectivity of hydrophilic interaction liquid chromatography (HILIC). In this work, polyethyleneimine (PEI) and PEI-functionalized carbon dots (PEICDs) mix-grafted silica packing material was prepared to act as a novel HILIC stationary phase. Both inner and outer surface of the porous silica are decorated with the mixture of PEI and carbon dots. This stationary phase, namely Sil-PEI/CDs, demonstrate enhanced retention ability and selectivity toward polar analytes, with which 11 nucleosides and nucleobases and 9 ginsenosides can be nicely separated. The Sil-PEI/CDs (RSD 0.12% - 0.54%) exhibited even better stability than the traditional PEI modified stationary phase (RSD 0.39% - 0.87%) within 40 h of continuously elution. And excellent column efficiency was observed from Sil-PEI/CDs (similar to 65,000 plates/m for cytidine). The strategy of mixed stabilization revealed a new method to prepare good performanced carbon dots based chromatographic column. (C) 2019 Elsevier B.V. All rights reserved.
机译：提出了一种基于碳的点和其前体的协同作用的新策略，以增强亲水性相互作用液相色谱（HILIC）的选择性。在这项工作中，聚乙烯亚胺（PEI）和PEI官能化点（PEICDs）MIX-接枝制备二氧化硅填充材料以充当新的HILIC固定相。多孔质二氧化硅的两个内表面和外表面与PEI和碳的点的混合物的装饰。此固定相，即SIL-PEI /光盘，表现出更加保持朝向极性分析物，与11个的核苷和核碱基和9种人参皂甙能很好地被分离能力和选择性。所述SIL-PEI / CDS（RSD 0.12％ - 0.54％）显示出更好的稳定性比传统的PEI改性的固定相（RSD 0.39％ - 0.87％）的连续洗脱40小时之内。和从SIL-PEI观察到优良的柱效/ CDS（类似于65000块板/米为胞苷）。混合稳定化策略揭示了一种新方法，以制备基于色谱柱性能良好1，碳圆点。 （c）2019 Elsevier B.v.保留所有权利。

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