Effects of metal ion in cationic Pd(II) and Ni(II) phthalocyanines on physicochemical and photodynamic inactivation properties

•Novel nonperipheral 2-hydroxypyridine tetrasubstituted palladium(II) and nickel(II) phthalocyanines and their quarternized derivatives.•Photophysicochemical studies of the two new quarterner phthalocyanines.•Antibacterial efficiency of novel phthalocyanines against Gram (+) Methicillin-resistant Staphylococcus aureus (MRSA) and Gram (-) Aeromonas hydrophila through photodynamic therapy (PDT).