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[Preparation, characterization and chromatographic performance of curcumin bonded silica stationary phase].

A curcumin bonded silica stationary phase (CCSP) for high performance liquid chromatography was prepared by using gamma-glycidoxypropyltrimethoxysilane (KH-560) as coupling reagent. Its structure was characterized by elemental analysis, Fourier transform infrared spectroscopy and thermal analysis. The chromatographic performance and the retention mechanism on the new packing material were evaluated by using neutral, acidic and basic compounds as solute probes and methanol-water as binary mobile phases. A comparative study with ODS was carried out as well. The results showed that CCSP appeared to be excellent reversed-phase stationary phase with versatile chromatographic functions. The curcumin ligand bonded on silica gel can provide n-pi and pi-pi action sites for different analytes because of its integrated conjugated system. Additionally, the polar hydroxyl and carbonyl groups of curcumin facilitated dipoledipole and hydrogen-bonding interactions between the ligand and solutes in the effective separation process. In comparison with ODS, CCSP has the advantages in fast separation of polar compounds because of its weaker hydrophobicity and various synergistic sites.