HPLC Retention Behavior of Poly-Aromatic-Hydrocarbons on Aminopropyl Silica Gels Modified with Cu(II)- and Ni(II)-Phthalocyanine Derivatives in Non-polar Eluent

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  • HPLC Retention Behavior of Poly Aromatic Hydrocarbons on Aminopropyl Silica Gels Modified with Cu 2 and Ni 2 Phthalocyanine Derivatives in Non polar Eluent

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A comparative study was conducted to elucidate the mechanism underlying the separation of poly-aromatic-hydrocarbons (PAHs) and related compounds thereof on a column packed with silica gels modified with Ni(II)- or Cu(II)-phthalocyanine derivatives (PCS) (Ni- or Cu-PCSD column) and commercially available PYE® and NPE® columns with a non-polar eluent, such as n-hexane. It has been revealed that the dominant interaction responsible to the separation of PAHs on the Cu-PCSD and the PYE® columns with n-hexane is the π–π interaction; however, in the separation of PAHs having 4 rings such as pyrene on the Ni-PCSD column, participation of π–d interaction was indicated. The predominant role of π–π interaction in the separation of PAHs of less than three rings on the Ni-PCSD column was demonstrated using anthracene. All the columns possessed planar recognition ability and were estimated to be potentially useful in the separation and the analysis of PAHs.

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