title: Simple and Facile Approach To Create Charge Reversible Pores via Hydrophobic Anchoring of Ionic Amphiphiles.
abstract: Mesoporous silica-based charge reversal systems have gained significant attention in recent years due to a variety of applications such as drug delivery, dye adsorption, catalysis, chromatography, etc. Such systems often use covalent strategies to immobilize functional groups on the silica scaffold. However, lack of dynamism, modularity, and postsynthetic flexibility associated with covalent routes limit their wider applicability. Alternatively, supramolecular routes are gaining increased attention owing to their ability to overcome these limitations. Here, we introduce a simple and facile noncovalent design for a highly reversible assembly of charged amphiphiles within mesopores. Hexyl pendant groups were covalently attached to the surface to provide hydrophobic anchoring for charged amphiphiles to enable facile switching of surface charge of the mesoporous silica. These charge-switchable surfaces were used for fast and selective adsorption of dyes from aqueous solutions.
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit and ‡Supramolecular Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bangalore 560064, India.
authors.forename: K P
authors.initials: KP
authors.lastname: Sonu
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit and ‡Supramolecular Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bangalore 560064, India.
authors.forename: B V V S
authors.initials: BV
authors.lastname: Pavan Kumar
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit and ‡Supramolecular Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bangalore 560064, India.
authors.forename: Subi J
authors.initials: SJ
authors.lastname: George
authors.affiliation: Nanomaterials and Catalysis Lab, Chemistry and Physics of Materials Unit and ‡Supramolecular Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research , Jakkur P.O., Bangalore 560064, India.
authors.forename: Muthusamy
authors.identifier: http://orcid.org/0000-0002-5015-3094
authors.initials: M
authors.lastname: Eswaramoorthy
keywords: charge reversal; dye adsorption; hydrophobic interaction; mesoporous materials; recyclable scaffold; supramolecular chemistry