Issue 13, 2020

The construction of helicate metal–organic nanotubes and enantioselective recognition

Abstract

Intriguing 1D single-walled metal–organic nanotubes (MONTs) Zn2(RR-CHCAIP)Py2(H2O) (HMOF-2) were successfully self-assembled using a semirigid homochiral ligand, 5,5′-((1R,2R)-cyclohexane dicarbonyl bis(azanediyl)) diisophthalic acid (RR-CHCAIP) with zinc salt, which was constructed from an organic ligand similar to the twin blades of a propeller with the Zn2(COO)4(H2O)(Py)2 cluster acted as the SBU, and the terminal pyridine auxiliary ligand capping at the Zn atoms played a key role in the formation of the 1D single nanotubes. The fluorescence of the HMOF-2 emulsion could be effectively quenched by D/L-lactic acid, D/L-tartaric acid enantiomers and D/L-alanine via hydrogen bonding interactions with the inwall of MONTs, which suggested this to be a remarkable chiral sensor for α-hydroxyl carboxylic acid and amino acid enantiomers with good sensitivity and enantioselectivity. Comparatively, HMOF-2 showed a negligible response towards D/L-mandelic acid and D/L-tyrosine, which chiefly arose from the confinement effect and the host–guest interaction of MONTs with the analytes. The construction strategy of MONTs based on the homochiral propeller-like ligand that bridges two metallic pillars will open new perspectives for developing self-assembling chiral MONTs with unique and practically useful enantioselective functions.

Graphical abstract: The construction of helicate metal–organic nanotubes and enantioselective recognition

Supplementary files

Article information

Article type
Paper
Submitted
27 Oct 2019
Accepted
13 Feb 2020
First published
14 Feb 2020

J. Mater. Chem. C, 2020,8, 4453-4460

The construction of helicate metal–organic nanotubes and enantioselective recognition

Y. Zhao and X. Zhang, J. Mater. Chem. C, 2020, 8, 4453 DOI: 10.1039/C9TC05859A

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