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Supramolecular Switching of Ion-Transport in Nanochannels

Kumar, B V V S Pavan and Sonu, K P and Rao, K Venkata and Sampath, S and George, Subi J and Eswaramoorthy, M (2018) Supramolecular Switching of Ion-Transport in Nanochannels. In: ACS APPLIED MATERIALS & INTERFACES, 10 (28). pp. 23458-23465.

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Official URL: https://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 pi-electron-rich charged motifs (pyranine-based donors) to interact with the surface of mesoporous silica modified with pi-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: Journal Article
Additional Information: Copyright of this article belong to AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 09 Aug 2018 15:40
Last Modified: 09 Aug 2018 15:40
URI: http://eprints.iisc.ac.in/id/eprint/60384

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