Metal organic frameworks (MOF) are a class of compounds consisting of metal ions or clusters coordinated to organic ligands to form one-, two-, or three-dimensional structures.
In some cases, the pores are stable during elimination of the guest molecules (often solvents) and could be refilled with other compounds. Because of this property, MOFs are of interest for the storage of gases such as hydrogen and carbon dioxide. Other possible applications of MOFs are in gas purification, in gas separation, in water remediation, in catalysis, as conducting solids and as supercapacitors.
Covalent organic frameworks (COF) are a class of materials that form two- or three- dimensional structures through reactions between organic precursors resulting in strong, covalent bonds to afford porous, stable, and crystalline materials.
COFs emerged as a field from the overarching domain of organic materials as researchers optimized both synthetic control and precursor selection. These improvements to coordination chemistry enabled non-porous and amorphous organic materials such as organic polymers to advance into the construction of porous, crystalline materials with rigid structures that granted exceptional material stability in a wide range of solvents and conditions.
A organic solid-state electrolyte (OSSE) is a organic solid ionic conductor and electron-insulating material and it is the characteristic component of the solid-state battery. It is useful for applications in electrical energy storage in substitution of the liquid electrolytes found in particular in lithium-ion battery.
The organic thermoelectric materials(OTE) show the thermoelectric effect in a strong or convenient form.
The organic thermoelectric effect refers to phenomena by which either a temperature difference creates an electric potential or an electric potential creates a temperature difference. These organic materials are mainly used for body sensing devices, etc.
Photopolymerization initiators are used in many fields to generate photocurable composites. These composites are polymerized by irradiation with UV light and electron beam which leads to altered physical properties of the composites such as solubility, viscosity and adhesiveness. In particular, the phenomenon in which a liquid changes into a solid is most useful and is applied to surface-treating techniques in fields including paints, printing inks, dental materials, lithography, photoresist, etc.
Thermal polymerization initiators are compounds that generate radicals or cations upon exposure to heat. For example, azo compounds such as AIBN and organic peroxides such as BPO are well-known thermal radical initiators, and benzenesulfonic acid esters and alkylsulfonium salts have been developed as thermal cation initiators.
Photosensitizer is a molecule that produces a chemical change in another molecule in a photochemical process. They are commonly used in polymer chemistry in reactions such as photopolymerization, photocrosslinking, and photodegradation.
UV absorber is a substance that can absorb the ultraviolet part of sunlight or fluorescent sources. It can convert high-energy ultraviolet light energy into heat or release non-destructive longer light waves, thereby protecting substances added with UV absorbers from UV rays. Mainly used as a light stabilizer for plastics, rubber, coatings, dyes, etc., to prevent their photodecomposition.
Photoredox catalysis is a branch of photochemistry that uses single-electron transfer. Photoredox catalysts are generally drawn from three classes of materials: transition-metal complexes, organic dyes, and semiconductors.