Syntheses, structures and luminescent properties of two novel Zn (II) coordination polymers

Highlights: • Two new coordination polymers were synthesized and characterized. • The assembly processes of H₂TZMB and Zn(II) ions were studied to design intriguing coordination polymers. • Temperature and solvent play significant roles in determining the construction of coordination polymers. • The structural diversity and luminescent properties were also discussed. - Abstract: Two new coordination polymers, namely [Zn(TZMB)]_n (1) and {[Zn(TZMB)](H₂TZMB)]·(C₂H₅OH)_0.5(H₂O)_2.5}_n (2), (H₂TZMB = 4,4′-(1H-1,2,4-triazol-1-yl)methylene-bis(benzonic acid), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction analysis, elemental analysis (EA), IR spectrum analysis (IR), powder X-ray diffraction (PXRD), and thermogravimetric (TG) analysis. Single X-ray diffraction analysis reveals that complex 1 is a 3D 3,6-connected net with the point symbol of (6¹¹0.8⁴)(6³)₂ and complex 2 is a 2D 3-connected net with the point symbol of (6³). Furthermore, luminescent properties of complexes 1 and 2 were also investigated in detail.