Chemistry What are molecular aggregates? Detailed!

Mi has found molecular aggregates, hoping for this supramolecule.

A new substance is formed, which is composed of molecules that are not covalently bonded to each other, and is called supramolecule. This work originally originated in the early eighties. Countless molecules of the same group are arranged together in a regular and orderly manner due to weak interactions, and the substances formed are called supramolecular aggregates.

In contrast, polymers are macromolecules formed by covalent bonds between monomers, and supramolecules are combinations of different molecules held together by non-covalent bonds. Supramolecular aggregates, although not polymers, also have polymers on a macroscopic scale.

nature. Polymers are polymerized reactions between monomers.

In synthesis, supramolecular aggregates are "synthesized" due to weak interactions between different molecules, and this synthesis is called assembly or self-assembly ("assembly" refers to the assembly of chemists to assemble, and "self-assembly" refers to the automatic orderly assembly of molecules in the reaction system due to weak interactions between each other). The method of supramolecular assembly can be the attraction of positive and negative charges between molecules, the formation of new hydrogen bonds between different molecules, and the formation of infinitely continuous large complexes by multicoordination ligands and multicoordination metal atoms due to coordination.

It can also be a new system formed by the special mutual recognition between antigen cells and antibody cells, or even some groups and inorganic substances in polymers.

co-crystallization system, etc. The compound molecules that can be assembled are similar to the "monomers" of polymers to some extent, but the range of such "monomers" is wider, which can be inorganic, organic, polymer, and even cells. This "monomer" does not carry the reactive groups that a polymer "monomer" must have.

Therefore, the study of compound molecules with weakly interacting "groups" that can be used for assembly, similar to the study of new monomers of polymers; Studying the method by which molecules can be assembled with each other is similar to studying new polymerization reactions of polymers. Therefore, supramolecular aggregates provide new fields and new ideas for polymer chemists to study new "polymers".

Supramolecular aggregates have macropolymers because they are an ordered collection of countless molecules.

(except that this polymer is not formed by covalent bonding), so it can also be used as a "polymer" material. However, at present, most of the assembled supramolecular aggregates are two-dimensional systems (membranes), which have a small area and can only be used as functional materials.

Use. If it can be assembled into a three-dimensional system, it should have a wider use, which is one of the hot areas of polymer chemistry research.

A lot of branches together.