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- W3128401387 abstract "Carbon quantum dots (CQDs) are considered as good chromatographic separation materials. However, due to the hydrophily of the synthesized CQDs, their applications in HPLC are limited to HILIC for separating strong polar compounds only. In this work, a novel amphipathic CQDs with both hydrophobicity and hydrophily is developed as mixed-mode stationary phase for RPLC/HILIC. To give CQDs certain hydrophobicity, 1,8-diaminooctane is chosen as one of the carbon sources for introducing alkyl chain into CQDs. The amphipathic CQDs modified silica (CQDs/SiO2) stationary phase has typical characteristic of RPLC/HILIC. Both hydrophobic and hydrophilic compounds including alkylbenzenes, polycyclic aromatic hydrocarbons, nucleosides and bases, amino acids, β-adrenoceptor blockers and agonists, sulfonamides, antibiotics and alkaloids obtain satisfactory separation on this CQDs/SiO2 column. 14 nucleosides and bases commonly existing in living organisms achieve good separation on this amphipathic CQDs/SiO2 column within 25 min and the resolutions reach 1.33–13.83 with an average column efficiency of 18,800. The retention mechanism of this novel CQDs/SiO2 column is investigated by linear solvation energy relationship model. It is found that hydrophobic interaction, π-π stacking, hydrogen-bonding and electrostatic interactions are main retention interactions under RPLC mode. This work provides a new approach for synthesis of amphipathic CQDs. Also, it indicates that amphipathic CQDs with versatile functional properties have great prospect in separation science." @default.
- W3128401387 created "2021-02-15" @default.
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- W3128401387 date "2021-05-01" @default.
- W3128401387 modified "2023-09-27" @default.
- W3128401387 title "Amphipathic carbon quantum dots-functionalized silica stationary phase for reversed phase/hydrophilic interaction chromatography" @default.
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- W3128401387 doi "https://doi.org/10.1016/j.talanta.2021.122148" @default.
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