Photolysis and Photodegradation of N-Substituted Phthalimides with a Cymantrenyl Moiety

The photochemical behavior of substituted phthalimides with carboxylate groups associated with the cymantrenyl fragment is studied by infrared spectroscopy (IR), nuclear magnetic resonance (NMR) spectroscopy, UV-visible spectroscopy, and cyclic voltammetry (CV). During the formation of hemilabile dicarbonyl chelate complexes, a sharp change in the electronic, electrochemical, and optical properties of compounds is observed. According to the dynamic light scattering (DLS) method, further irradiation of solutions of these complexes leads to the formation of previously undescribed stable nanoparticles in liquid media containing manganese in two degrees of oxidation Mn²⁺/Mn⁺ and a phthalimide fragment associated with a Cp-ring coordinated or uncoordinated with manganese(I).