Structures and Photoluminescent Properties of Two Complexes Based on Dipyrido[3,2-a: 2′, 3′c] phenazine and 2,4.-Biphenyldicarboxylic Acid

Two new complexes [Cd(2,4 '-bpdc)(DPPZ)](2)n center dot nH(2)O (1) and [Zn(2,4.-Hbpdc)(2)(DPPZ)] center dot H2O (DPPZ = dipyrido[3,2-a: 2 ', 3 '-c] phenazine, 2,4.-H(2)bpdc = 2,4.-biphenyldicarboxylic acid) have been hydrothermally synthesized. The structure of complex 1 was determined by single-crystal X-ray diffraction diffraction and further characterized by elemental analysis, IR spectrum, powder X-ray diffraction (XRD) and single-crystal X-ray diffraction. Complex 1 has 1D chains, which are further connected by p-p stacking interactions of neighbouring chains, generating a steady 3D supramolecular structure. Complex 2 shows the isolated mononuclear units, which are further extended to a 2D supramolecular layered structure through p-p stacking interactions and hydrogen bonds. Furthermore, complexes 1 and 2 exhibit green photoluminescent properties at room temperature.