One of the most pressing environmental concerns of our age is the escalating level of atmospheric CO . Intensive efforts have been made to investigate advanced porous materials, especially porous organic polymers (POPs), as one type of the most promising candidates for carbon capture due to their extremely high porosity, structural diversity, and physicochemical stability. This review provides a critical and in-depth analysis of recent POP research as it pertains to carbon capture. The definitions and terminologies commonly used to evaluate the performance of POPs for carbon capture, including CO capacity, enthalpy, selectivity, and regeneration strategies, are summarized. A detailed correlation study between the structural and chemical features of POPs and their adsorption capacities is discussed, mainly focusing on the physical interactions and chemical reactions. Finally, a concise outlook for utilizing POPs for carbon capture is discussed, noting areas in which further work is needed to develop the next-generation POPs for practical applications.

The escalating atmospheric CO concentration is one of the most urgent environmental concerns of our age. To effectively capture CO , various materials have been studied. Among them, alkylamine-modified metal-organic frameworks (MOFs) are considered to be promising candidates. In most cases, alkylamine molecules are integrated into MOFs through the coordination bonds formed between open metal sites (OMSs) and amine groups. Thus, the alkylamine density, as well as the corresponding CO uptake in MOFs, are severely restricted by the density of OMSs. To overcome this limit, other approaches to incorporating alkylamine into MOFs are highly desired. We have developed a new method based on Brønsted acid-base reaction to tether alkylamines into Cr-MIL-101-SO H for CO capture. A systematic optimization of the amine tethering process was also conducted to maximize the CO uptake of the modified MOF. Under the optimal amine tethering condition, the obtained tris(2-aminoethyl)amine-functionalized Cr-MIL-101-SO H (Cr-MIL-101-SO H-TAEA) has a cyclic CO uptake of 2.28 mmol g at 150 mbar and 40 °C, and 1.12 mmol g at 0.4 mbar and 20 °C. The low-cost starting materials and simple synthetic procedure for the preparation of Cr-MIL-101-SO H-TAEA suggest that it has the potential for large-scale production and practical applications.

Alkylamine modified MOF prepared with a less polar solvent (cyclohexane) has a higher alkylamine loading amount and higher CO2 uptake than when prepared in a more polar solvent (dichloromethane).

Metal‐organic frameworks (MOFs) have emerged as a significant class of porous materials renowned for their well‐defined structures and various applications in the last few decades. As a novel category of solid adsorbents, MOFs have overshadowed many traditional porous materials owing to their chemically tunable structures, extraordinarily large porosity, and convenient functionalization procedures. Focused on the gas storage aspect of MOFs, this chapter elaborates the storage of some important gases (hydrogen, carbon dioxide, methane, and others) and features their applications in the areas of renewable energy conservation, environmental protection, and prospective biomedicines.