2d-Nitrogen MOFs Linkers

Charged N-donor linkers, usually azolates, are commonly used to prepare porous coordination polymers. Such linkers constitute five-membered heterocyclic azolates whose coordination mode is via the deprotonated sp2 N-donor atom. According to the number of nitrogen atoms in the heterocycle, azolate-based frameworks can be classified as follows. Metal azolate based frameworks are made of five-membered heterocycles containing variable numbers of nitrogen-donor atoms. Such frameworks make up the azole moiety, ranging from imidazoles containing two coordinating nitrogen atoms to tetrazole containing four coordinating nitrogen atoms, which deprotonate to form the azole anion. Increasing the number of N atoms results in increased acidity of the linker donor group. Different linkers provide variable coordination modes and angles, for example imidazolic acid anions provide an angle of 140, while pyrazolic acid has a shorter binding angle, i.e., an angle of 70. If all attachment sites are available, the binding mode and geometry of the azolate can be easily predicted. The azolate derived frameworks exhibit simple geometries, but a rich diversity of structural topologies is possible. Due to a similar binding mode to carboxylate-based linkers, aza-based N-donor linkers are known to form several cluster-based compounds. Among them, pyrazole salts lead to the formation of secondary building unit (SBU)-based frameworks. Therefore, high-performance MOFs can be obtained by using 2d-Nitrogen MOFs linkers as starting materials for MOFs construction.

CD Bioparticles manufactures and supplies 2d-Nitrogen MOFs linkers for MOFs synthesis. Contact us to find out how 2d-Nitrogen MOFs linkers can help you in your work.