Cobalt(II) perchlorate reacts with tridentate chelating Schiff base, N-((phenyl)formylidene)-N′-(2-aminoethyl)ethane-1,2-diamine (pfad) and azide in methanol–acetonitrile solution in 1:1:3 molar ratio to afford a chiral cobalt(III) complex [Co(pfad)(X)3] (1). The meridional arrangements of three N atoms of the tridentate chelator and three N 3 - in cobalt(III) center that construct a 3D supramolecular network through N–H…N hydrogen bonding and weak π…π interaction. Single band at 435 nm is observed in the solid-state emission spectrum.
