Issue 15, 2022

Molecular recognition of catechols on the crystal-like surface of periodic mesoporous organosilica containing pyridinylethynylpyridine

Abstract

A new periodic mesoporous organosilica (PMO) containing pyridinylethynylpyridine (PEPy) was successfully synthesized under basic conditions in the presence of a cationic surfactant. PEPy-PMO had a unique mesoporous structure with crystal-like walls, in which PEPy is periodically aligned. Catechols were adsorbed effectively on the PEPy moieties of the PMO surface in a mixed solvent of Et2O and hexane. The specific adsorption of catechols onto PEPy-PMO occurred with a high adsorption constant, which was evaluated using non-linear Langmuir plots. 2D HETCOR NMR and molecular dynamics calculations indicated that catechols were bound to PEPy by specific interactions, which is still a plausible mechanism. The adsorbed catechols can be easily released into the organic solvent and the recovered PEPy-PMO performed repeatedly the adsorption of catechols.

Graphical abstract: Molecular recognition of catechols on the crystal-like surface of periodic mesoporous organosilica containing pyridinylethynylpyridine

Supplementary files

Article information

Article type
Research Article
Submitted
22 Mar 2022
Accepted
05 May 2022
First published
09 May 2022

Inorg. Chem. Front., 2022,9, 3669-3678

Molecular recognition of catechols on the crystal-like surface of periodic mesoporous organosilica containing pyridinylethynylpyridine

M. Waki and S. Inagaki, Inorg. Chem. Front., 2022, 9, 3669 DOI: 10.1039/D2QI00608A

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