Synthesis, characterization of N,N′-bis(2-hydroxynaphthalidene)phenylene-1,2-diamine with M(II)(M = Ni, Zn and Fe) Schiff-base complexes and their non-linear optical studies by z-scan technique

► We report the synthesis and characterization of N,N′-bis(2-hydroxynaphthalidene)phenylene-1,2-diamine of M (M = Ni(II), Zn(II) and Fe(II)) Schiff-base complexes. ► Non-linear optical measurements of the complexes carried out at 532 nm using nanosecond laser pulses show optical nonlinearity. ► Among the samples, nickel complex displaying maximum optical limiting capability. Being optical limiters, these samples can have potential applications in optoelectronics and photonics.