Supramolecular Switching of Ion-Transport in Nanochannels

Kumar, B. V. V. S. Pavan ; Sonu, K. P. ; Rao, K. Venkata ; Sampath, S. ; George, Subi J. ; Eswaramoorthy, M. (2018) Supramolecular Switching of Ion-Transport in Nanochannels ACS Applied Materials & Interfaces, 10 (28). pp. 23458-23465. ISSN 1944-8244

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Official URL: http://doi.org/10.1021/acsami.8b07098

Related URL: http://dx.doi.org/10.1021/acsami.8b07098

Abstract

Noncovalent approaches to achieve smart ion-transport regulation in artificial nanochannels have garnered significant interest in the recent years because of their advantages over conventional covalent routes. Herein, we demonstrate a simple and generic approach to control the surface charge in mesoporous silica nanochannels by employing π-electron-rich charged motifs (pyranine-based donors) to interact with the surface of mesoporous silica modified with π-electron-deficient motifs (viologen-based acceptors) through a range of noncovalent forces, namely, charge-transfer, electrostatic, and hydrophobic interactions. The extent of each of these interactions was independently controlled by molecular design and pH, while employing them in a synergistic or antagonistic fashion to modulate the binding affinity of the charged motifs. This enabled the precise control of the surface charge of the nanochannels to achieve multiple ion-transport states.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
Keywords:Ion Transport; Nanochannels; Noncovalent Functionalization; Supramolecular Gating; Charge Transfer Interaction; Multiple Gating States.
ID Code:117705
Deposited On:30 Apr 2021 05:22
Last Modified:30 Apr 2021 05:22

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