**3. Conclusions and perspectives**

and P(P)<sup>4</sup>

be potentially synthesized.

146 Descriptive Inorganic Chemistry Researches of Metal Compounds

found on the Zn‐centres.

**Figure 4.** Structures of the [ZnP(P)<sup>4</sup>

]2

permission conveyed through Copyright Clearance Center, Inc.

2−/P2− were shown to be very similar for both ligands. The full P‐modification of the

species

units (**Figure 4**).

stacks, binding modes I (a), II (b), and III (c), calculated at the B3LYP/6‐31G\*

level of theory. Republished with permission of Journal of Theoretical and Computational Chemistry, Kuznetsov [66];

porphyrin core was found to decrease the Mn+‐ligand binding energies; however, the MP(P)<sup>4</sup> compounds studied were shown to be stable according to the Ebind values and therefore can

Also in 2016, due to motivation by the phenomenon of formation of stacks by regular metal‐

without any linkers or substituents was performed [66]. Three modes of binding or coordina‐

The 'convexity‐to‐convexity' dimer I was found to be the most stable compound with the highest binding energy. In the dimer I, the strongly convex shape of both monomer units was demonstrated. The Zn–Zn distances in the dimer I, ca. 3.5 Å, were computed to be signifi‐ cantly shorter than in two other dimers. In the dimer I, significant decrease of the charge was

loporphyrins, the computational check of the stack formation between the MP(P)<sup>4</sup>

tion were found to be possible between the monomeric ZnP(P)<sup>4</sup>

Thus, as can be seen from this micro‐review, core modification of the porphyrins and their derivatives with other elements than N is a very promising and productive approach to modify and fine‐tune their structures, electronic and coordination properties and reactivities. The research in this area has already been quite productive and brought for our attention numerous compounds with unusual novel structures and properties, which makes these species great candidates for different fields in chemistry and nano‐ technology. Without any doubts, studies in this area will be continued and broadened. Based on the considered studies of porphyrin derivatives core‐modified by other ele‐ ments, we can summarize subareas (or research directions), which would be necessary to focus on to employ the core‐modified porphyrins for the design of building blocks for nanotechnology:

