Aggregation of platinum-containing complexes YAK91 and SAF-23 containing NNC-type chromophore was studied using 1H, 195Pt and DOSY - NMR spectroscopy in solution. The molecules under study contain the same heterocyclic chromophore with a chlorine atom bound to platinum, and differ in the position of aromatic radical containing hydrocarbon chains of different lengths. The experimental data were analyzed using indefinite non-cooperative and cooperative self-association models for proton chemical shifts and a dimer model for the diffusion coefficient. The obtained results indicate a good correspondence of the K value obtained from various methods: titration of proton chemical shifts and measurement of the diffusion properties of the system. It is concluded that of all the tridentate platinum-containing compounds studied in the project, the YAK-91 and SAF-23 studied in this work have the highest values of self-association constants.
NMR spectroscopy, luminescent platinum-containing complexes, self-association
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