In what sense? Please be more specific. On one hand, it is about the size. Nanomaterials are materials whose particle size is roughly in the range 1-100 nm. For example, porphyrins and phthalocyanines (typical N-heterocyclic compounds) with bulky substituents can have molecular size of >1 nm, so that they fall into the range. Furthermore, polypeptides and proteins fall into this size category, not to mention synthetic oligomers and polymers. However, one should also have in mind that molecular compounds have an exact constant composition, contrary to typical nanomaterials.
All nanoparticles have a large specific surface area. For example, a cube with a size of 1 nm has a specific surface of 6000 m2 / cm3. Therefore, such systems will be able to reduce the Gibbs energy of the surface due to the aggregation or adsorption of heterocyclic compounds. If there is an electron acceptor on the surface of the nanoparticles, then heterocyclic compounds can form a donor-acceptor bond with the surface of the nanoparticles.
Nanostructure material has unique properties, such as its surface, morphology, shape, (porous nanosheet, nanotubes, nanorods, etc). Heterocyclic compound may be in the range of nanometer scale, at the same time multiring structure of (heterocyclic compound) having different features/characteristic other than nanomaterial.
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