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A new complex[Cd(nph)(bix)]n (1,H2nph =4-nitrophthalic acid,bix =1,4-bis(imidazol-l-yl)-benzene) has been successfully synthesized under hydrothermal conditions.Its structure has been characterized by elemental analysis,IR spectrum,TG,single-crystal and powder X-ray diffractions.The Cd2+ ion has a distorted octahedral environment with four O atoms from two nph ligands and two N atoms from two bix ligands.Each bix acts as a cis-conformation bridging ligand to link the neighboring[Cd2(nph)]subunit to form tetranuclear subunits with 42-ring,which are bridged again by bix ligands to yield a two-dimensional network structure.It was stabilized by C-H…O hydrogen bonding and π-π interactions,and extended into a 3D supramolecular architecture.Moreover,the luminescent properties of complex 1 have been investigated in the solid state.