Base-Resistant Ionic Metal-Organic Framework as a Porous Ion-Exchange Sorbent

Aamod V Desai; Arkendu Roy; Partha Samanta; Biplab Manna; Sujit K Ghosh

doi:10.1016/j.isci.2018.04.004

Base-Resistant Ionic Metal-Organic Framework as a Porous Ion-Exchange Sorbent

iScience. 2018 May 25:3:21-30. doi: 10.1016/j.isci.2018.04.004. Epub 2018 Apr 12.

Authors

Aamod V Desai¹, Arkendu Roy¹, Partha Samanta¹, Biplab Manna¹, Sujit K Ghosh²

Affiliations

¹ Department of Chemistry, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411 008, India.
² Department of Chemistry, Indian Institute of Science Education and Research (IISER), Dr. Homi Bhabha Road, Pashan, Pune 411 008, India; Centre for Energy Science, IISER Pune, Pune 411 008, India. Electronic address: sghosh@iiserpune.ac.in.

Abstract

A systematic approach has been employed to obtain a hydrolytically stable cationic metal-organic framework (MOF). The synthesized two-dimensional Ni(II)-centered cationic MOF, having its backbone built from purely neutral N-donor ligand, is found to exhibit uncommon resistance over wide pH range, particularly even under highly alkaline conditions. This report presents a rare case of a porous MOF retaining structural integrity under basic conditions, and an even rarer case of a porous cationic MOF. The features of stability and porosity in this ionic MOF have been harnessed for the function of charge- and size-selective capture of small organic dye through ion-exchange process across a wide pH range.

Keywords: Coordination Chemistry; Materials Chemistry; Porous Material.