Determination of Enantiomeric Excess by Solid-Phase Extraction Using a Chiral Metal-Organic Framework as Sorbent.

Metal-organic frameworks (MOFs) have recently attracted considerable attention because of their fascinating structures and intriguing potential applications in diverse areas. In this study, we developed a novel method for determination of enantiomeric excess () of (±)-1,1'-bi-2-naphthol by solid-phase extraction (SPE) using a chiral MOF, Co(l-tyr), as sorbent. After optimization of the experimental conditions, a good linear relationship between the and the absorbance of the eluate (² = 0.9984) was obtained and the standard curve was established at the concentration of 3 mmol L¹. The values of (±)-1,1'-bi-2-naphthol samples can be rapidly calculated using the standard curve after determination of the absorbance of the eluate. The method showed good accuracy, with an average error of 2.26%, and is promising for analysis.