Metal organic ionic framework based on the ionic metal complex and organic moiety as counter ion: A review

Abstract

Metal organic ionic frameworks (MOIFs) or inorgano-organic salts (IOSs) are the product of an ionic interaction between metal ionic complex and opposite organic ion in water, through ion exchange mechanism. These are not dissociated in solvent which makes them different from classical salts. In this review, the metal complexes anions and organic partner such as imidazolium, quaternary alkyl ammonium, pyridinium and phosphonium ions have been taken into account to prepare a mile-ground for MOIFs. The nature, properties, ionic mechanism and related aspects of MOIFs have been discussed. Various approaches for probing ionic interactions in MOIFs have been summarized and applicable areas of functionalized materials related to MOIFs have been discussed. With this background, the MOIFs composed of transition metal anionic complexes and quaternary ammonium/imidazolium/phosphonium compounds, have been categorized as a part of this review. Mostly, the review of last three decades is considered but some earlier studies have also been included in this article. The recent developments in this field have also been focused as a part of this study.

Keywords

• MOIFs
• Inorgano-organic salts
• Quaternary ammonium
• Metallic anion
• Organic cation