The electo -optical properties of flexible PDLC films doped with one mono -ligand alkyl/alkoxy/alkeneoxy-azobenzene with Pd metal -complex and three bi -ligands salicylaldiminates with Cu metal -complex metallomesogens (MOMs) as a function of MOM concentration under natural aging have been evaluated. The results indicate that, MOM -doped PDLC films exhibit improvements of their switching voltages and optical transmissions before and after natural aging.