Chiral metal–organic framework coated quartz crystal microbalance for chiral discrimination?
RSC Advances Pub Date: 2015-03-24 DOI: 10.1039/C5RA01204J
Abstract
The development of novel methods for chiral discrimination remains a challenging and important area due to the structural similarity but significantly different roles of enantiomers in biological and environmental systems. Here we report a 3D chiral porous Zn–organic framework (Zn2(bdc)(L-lac)(dmf)·DMF) coated quartz crystal microbalance (QCM) sensor for chiral discrimination of four pairs of enantiomers. The adsorption isotherms of the enantiomers on Zn2(bdc)(L-lac)(dmf)·DMF follow the Dubinin–Astakhov equation. The QCM sensor shows excellent sensitivity and enantioselectivity. The chiral recognition ability of the Zn2(bdc)(L-lac)(dmf)·DMF sensor was temperature and concentration dependent. The chiral selectivity factor ranged from 1.36 (S/R-1-(1-naphthyl)ethylamine) to 2.20 (S/R-1-phenylethylamine) at 25 °C. The good chiral recognition capacities of enantiomers provide Zn2(bdc)(L-lac)(dmf)·DMF potential for the discrimination of enantiomers.
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Journal Name：RSC Advances
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CAS no.: 89640-58-4
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