Created a coordination polymer based on radicals for next-generation electronics

Materials with unpaired electrons on two-dimensional honeycomb lattices have attracted much attention from scientists as

potential candidates for future spintronicsand photonic devices, as well as next generation electronics. Organic radical-based coordination polymer (CR) is one of the candidates for such materials. It has a structure containing metal atoms at the center of a repeating sequence of organic radicals. Several CPs have now been prepared on a radical basis with a honeycomb lattice structure. However, in-depth investigation of their functions and material development are often difficult due to their instability and poor crystallinity.

Radicals are atoms or moleculeswith an unpaired electron in the outer shell. The lack of pairing with another electron makes it extremely reactive with other substances, so radicals tend to be very short-lived. However, there are some radicals that last even under everyday conditions of temperature and pressure. These stable radicals exhibit electrical, magnetic and photoemissive properties similar to those of inorganic materials such as metals, oxides and chalcogenides.

The IMS team has developed a recipe for KPs thatdurable in environmental conditions. It uses a completely new triangular organic radical, the tris (3,5-dichloro-4-pyridyl) methyl radical, or trisPyM. It is not only stable, but also exhibits photoluminescence in solution and solid state. In addition, by combining trisPyM with a zinc-containing Zn (II) molecule and obtaining trisZn, scientists have developed a stable, crystalline and photoluminescent CP based on radicals with a two-dimensional honeycomb lattice structure.

TrisZn is just proofconcept of our recipe, and many radical CPs can in principle be obtained simply by using different metal ions or metal complex elements. I hope that some of these materials will find practical applications or show unprecedented possibilities. phenomena that advance materials science.

Tetsuro Kusamoto of IMS

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Lattice structure coordinationpolymers are composed of metal ions or small clusters bound by organic ligands. These materials are microporous structures with pore sizes of a few nanometers. They are characterized by high pore identity, large surface area, and high porosity values. MOFs can form spatial one-, two-, or three-dimensional structures. The choice of metal, organic ligand and synthesis method determines the size and geometry of the pores.