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Inorganic Chemistry

Inorganic Chemistry

IF: 4.3
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Enhanced Enantioselective Sensing of 1,1′-Bi-2-naphthol and Mandelic Acid by Proportional Fluorescence Sensor 3DOM Zn-MOF-74-l-Trp with Hierarchical Macro?…

Published:11 December 2024 DOI: 10.1021/acs.inorgchem.4c04464
Mengyun Lu, Xinwen Jia, Wenjing Zhang, Wuduo Zhao, Ajuan Yu, Gangfeng Ouyang

Abstract

The enantioselective performance of porous chiral metal–organic frameworks (CMOFs) is closely related to the pore size and uniformity of easily accessible active sites. The chiral recognition efficiency of microporous CMOFs is hindered by the restricted diffusion of the guest. Hierarchical porous chiral CMOFs with multiple pore size regimes ranging from micropores to macropores have emerged as potential candidates in chiral separation applications. 3DOM Zn-MOF-74 crystalline porous material with ordered macro–micropore structure was prepared with a general bottom-up strategy by carrying out the controllable confined growth of Zn-MOF-74 precursor in a removable three-dimensional ordered macroporous (3DOM) polystyrene (PS) template. Then l-tryptophan ( l -Trp) was introduced into MOFs by the strategy of postsynthetic modifications, and finally, a chiral hierarchical porous functional material 3DOM Zn-MOF-74-l-Trp was successfully fabricated. Based on the two luminescent centers from the achiral ligand H4DOBC and chiral ligand l-Trp, the proportional fluorescence sensor 3DOM Zn-MOF-74-l-Trp was hopeful to be applied in the field of enantioselective fluorescence sensing. The enantioselectivity factor values of microporous M-Zn-MOF-74-l-Trp for 1,1′-bi-2-naphthol (Binol) and mandelic acid (MA) were 1.08 and 1.12, respectively. In comparison, the construction of hierarchical porous structure greatly enhanced the chiral recognition performance, which may be due to the improved mass-transfer efficiency of chiral guest molecules and highly swelled accessibility to the chiral recognition sites in this CMOF composite, making the enantioselectivity factor values correspondingly increased to 1.29 and 2.26, respectively.

Substances (5)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Sodium hydroxide 1310-73-2 NaOH 1358 suppliers $14.00-$17490.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1313 suppliers $11.20-$12200.00
Ethanol 64-17-5 C2H6O 955 suppliers $10.00-$28350.00
Methanol 67-56-1 CH4O 895 suppliers $9.00-$7620.00
Styrene 100-42-5 C8H8 738 suppliers $7.62-$2055.90

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