Studies on Synthesis, Optical and Magnetic Properties of Zn, Mn, Co and Ni Complexes of Biphenylenedicarboxylic Acid Ligands

•Fluorescence intensity of complex [Zn(Hbpda) 2 (4,4′-dipy) 2] is enhanced than ligand.•Complexes [Mn(Hbpda)2(4,4′-dipy)3]n, [Ni(bpda)(4,4′-dipy)1.5 •4H2O]n and [Ni(bpda)(2,2′-dipy) •2H2O]n have ferromagentic property.•Complexes [Co(Hbpda)2(4,4′-dipy)2], [Mn(bpda)(2,2′-dipy)]n and [Co(bpda)(2,2′-dipy) •2H2O]n have antiferromagentic property.