期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 3, 页码 1093-1097出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201909352
关键词
chirality; circular dichroism; materials science; structure elucidation; X-ray diffraction
资金
- Hong Kong Research Grants Council [PolyU 253009/18P]
- National Natural Science Foundation of China [21902139]
Reported here is the first crystallographic observation of stereospecific bindings of l- and d-lysine (Lys) in achiral MFI zeolites. The MFI structure offers inherent geometric and internal confinement effects for the enantiomeric difference in l- and d-Lys adsorption. Notable differences have been observed by circular dichroism (CD) spectroscopy and thermogravimetric analysis (TGA). Distinct l- and d-Lys adsorption behaviours on the H-ZSM-5 framework have been revealed by the Rietveld refinement of high-resolution synchrotron X-ray powder diffraction (SXRD) data and the density-functional theory (DFT) calculations. Despite demonstrating the approach for l- and d-Lys over MFI zeolites at an atomistic resolution, the differential adsorption study sheds light on the rational engineering of molecular interaction(s) with achiral microporous materials for chiral separation purposes.
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