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Title: Differential adsorption of L- and D-lysine on achiral MFI zeolites as determined by synchrotron X-ray powder diffraction and thermogravimetric analysis
Authors: Chen, T 
Huang, B 
Day, S
Tang, CC
Tsang, SCE
Wong, KY 
Lo, TWB 
Issue Date: 13-Jan-2020
Source: Angewandte chemie international edition, 13 Jan. 2020, v. 59, no. 3, p. 1093-1097
Abstract: 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.
Keywords: Chirality
Circular dichroism
Materials science
Structure elucidation
X-ray diffraction
Publisher: Wiley-VCH
Journal: Angewandte chemie international edition 
ISSN: 1433-7851
EISSN: 1521-3773
DOI: 10.1002/anie.201909352
Rights: © 2020 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
This is the peer reviewed version of the following article: Chen, T., Huang, B., Day, S., Tang, C. C., Tsang, S. C. E., Wong, K. Y., & Lo, T. W. B. (2020). Differential Adsorption of l‐and d‐Lysine on Achiral MFI Zeolites as Determined by Synchrotron X‐Ray Powder Diffraction and Thermogravimetric Analysis. Angewandte Chemie, 132(3), 1109-1113, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
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