Porous organic cages for gas separations

Abstract

Gases have played a crucial role in various industries, spanning from manufacturing and medicine to electronics. In these industries, the attainment of pure gases through effective separation methods has been...

Recent progress in iodine capture by macrocycles and cages

“…In contrast to MOFs and COFs that have extended networks, molecular cages, including covalent organic cages (COCs) [75][76][77] and metal-organic cages (MOCs), [78][79][80] are discrete molecules with well-defined cavities and usually present excellent solubility.…”

Adsorptive Separation of Methylfuran and Dimethylfuran by a Robust Porous Organic Cage

“…Porous organic cages (POCs) represent a novel category of porous organic molecular materials characterized by covalently bonded discrete supramolecular molecules with well-defined internal cavities. − The distinct and discrete nature of POCs bestows them notable advantages, such as solution processing, easy regeneration, and large-scale production. − These emerging molecular hosts and functional materials have garnered significant attention and exhibited flourishing development trends in various applications, including gas adsorption, molecular recognition, sensing, encapsulation, and catalyst supports. − Leveraging the hollow cavity with multiple pore windows, POCs enable facile host–guest recognition and selective adsorptive separation. − Additionally, the strategic incorporation of functional building blocks into the cage framework enhances the host–guest interactions, thereby facilitating the precise separation of specific compounds. , POCs have achieved significant progress in gas separation, but their exploration of liquid organic molecules remains limited and warrants further investigation. To our best knowledge, the utilization of POC adsorbents in separating liquid organic molecules has primarily been limited to mixtures such as mesitylene/4-ethyltoluene, cyclohexane/benzene, toluene/methylcyclohexane, and xylene isomers .…”

Progress of porous organic cages in photo/electrocatalytic energy conversion and storage applications

“…7,8 Owing to the diverse functionality and unique physicochemical properties of POCs, they have potential applications in gas storage and separation, porous liquids and membranes, proton conducting materials, and water channels. 2,4,9,10 Therefore, the design and development of next-generation POCs with unique architectures and rich functionalities have become a rewarding new direction in chemistry and materials science. The advantage of using cages compared to other crystalline porous materials is that these composites are synthesized employing a homogeneous solution, resulting in efficient mixing of their components.…”