摘要
Synthesis and X-ray structural characterization of three complexes of type cis-[M(dafone) 2 (NCS) 2 ] (M = Co(II), 1; Ni(II), 2; Zn(II), 3; dafone = 4,5-diazafluoren-9-one) and a polymer cis-[Cd(dafone)(NCS) 2 ] n (4) have been reported. Each of the four complexes is crystallized in orthorhombic crystal system. Structural study reveals that each metal(II) centre in the four complexes adopts distorted octahedral geometry with MN 6 chromophore in 1-3 and MN 4 S 2 chromophore in 4. The room temperature steady-state fluorescent intensity of dafone in dimethyl formamide at 402 nm is found to be quenched in these reported dafone complexes (1-4). © 2014 Indian Academy of Sciences.