Metal–Organic Frameworks for NO_x Adsorption and Their Applications in Separation, Sensing, Catalysis, and Biology

Abstract

Nitrogen oxide (NOx) is a family of poisonous and highly reactive gases formed when fuel is burned at high temperatures during anthropogenic behavior. It is a strong oxidizing agent that significantly contributes to the ozone and smog in the atmosphere. Thus, NOx removal is important for the ecological environment upon which the civilization depends. In recent decades, metal–organic frameworks (MOFs) have been regarded as ideal candidates to address these issues because they form a reticular structure between proper inorganic and organic constituents with ultrahigh porosity and high internal surface area. These characteristics render them chemically adaptable for NOx adsorption, separation, sensing, and catalysis. In additional, MOFs enable potential nitric oxide (NO) delivery for the signaling of molecular NO in the human body. Herein, the different advantages of MOFs for coping with current environmental burdens and improving the habitable environment of humans on the basis of NOx adsorption are reviewed.

Integrating TEMPO into a Metal–Organic Framework for Cooperative Photocatalysis: Selective Aerobic Oxidation of Sulfides

“…Metal–organic frameworks (MOFs), derived from different metal-oxo nodes and organic linkers with persistent porosity, large specific surface areas, and uniform open cavities, are distinct crystalline porous materials. − Due to the noticeable thermal and chemical durability and the availability of abundant and spatially distributed binding sites, MOFs containing various metal-oxo nodes and carboxyl organic linkers are one of the most widely studied categories. − So far, to obtain a better activity in diversified fields, a variety of strategies have been used for MOFs, including adding acid modulators, , changing solvents, loading metals, − constructing heterojunctions, − and so forth. In this context, this might be applicable in redox reactions powered by light over MOFs.…”

Computational Exploration of a Metal(II) Catecholate-Functionalized UiO-66 Nanoporous Metal–Organic Framework for Effective NOx Capture

“…2−4 Among them, NO x are considered as life threatening toxic gases present in the atmosphere, with NO 2 showing an even higher level of toxicity than NO. 2 Exhaust from transport vehicles is the primary source of NO 2 emission. 5 Exposure to NO 2 alters the respiratory paths and can cause death even at the ppm level of concentration.…”

“…9−11 Physisorption-based NO x adsorption with the use of efficient sorbents is a promising alternative strategy. 2 Among the family of porous materials, activated carbons 12 and diverse zeolites, including mordenite, ZSM-5, and faujasite, have been revealed as potential candidates for NO x capture; 13−20 however, they have some limitations due the high reactivity and acidic nature of NO x , which led to either a collapse of the porous structures or regeneration issues. More recently, nanoporous metal− organic framework (MOF) 21−36 structures have been proposed as an alternative solution for NO x capture at low pressure because of the large variety of NO x -specific adsorption sites that can be incorporated into their pore walls.…”

Modulating the Biomimetic and Fluorescence Quenching Activities of Metal–Organic Framework/Platinum Nanoparticle Composites and Their Applications in Molecular Biosensing

“…Metal–organic frameworks (MOFs), , as a unique type of crystalline porous material, are constructed by organic linkers and metal nodes via coordination chemistry. Featuring structural flexility, porosity, and ready chemical tailorability, MOFs are the subject of extensive and intense research, especially in the applications of biomedicine, − energy storage, − and absorption technology. − Actually, over the past two decades, considerable efforts have been mainly focused on designing and constructing MOF structures, such as the iso-reticular MOFs (IRMOFs), zeolitic imidazolate framework materials (ZIFs), porous coordination networks (PCNs), and materials of Institute Lavoisier (MILs) . However, the intrinsic low activity and instability of MOFs stemming from metal nodes are usually blocked by organic linkers, restricting their potential applications.…”