**Acknowledgements**

The chapter was supported by the Romanian National Authority for Scientific Research, CNCS-UEFISCDI, project code PN-III-P1-1.1-PD-2021-0169 and contract number PD 106 and Romanian Academy within the research programs "*Colloids and dispersed systems*" and "*EPR and fluorescence studies on supramolecular interactions in inhomogeneous systems*" of the "Ilie Murgulescu" Institute of Physical Chemistry.
