A Cationic Two-Dimensional Zn(II) Coordination Polymer, Crystal Structure and Fluorescence Emission

Abstract

The reaction of 1,4-bis ((2H-benzo[d]imidazol-2-yl)methyl) naphthalene and pyridinium 1,1,2,3,3-pentacyanopropenide (PCP) with Zn(II) salts yielded twodimensional (2D) chain coordination polymer ([Zn (C 26 H 20 N 4 ) 2 2? ][C 8 N 5 -] 2 ). The 2D structure was synthesized via solvothermal synthesis; and structurally characterized by elemental analysis, thermogravimetric analysis, and singlecrystal X-ray diffraction. The X-ray single crystal revealed that [Zn(C 26 H 20 N 4 ) 2 2? ][C 8 N 5 -] 2 is comprised of the [Zn(C 26 H 20 N 4 ) 2 2? ] cationic chains and PCP anion [C 8 N 5 -] 2 . As a result of the porous nature of the cationic 2D network, the PCP-anions are located at the rhombic windows that balance the charge of 2D structure. The luminescent and thermal properties were also investigated. The fluorescence emission of the coordination polymer was investigated in the presence of hydrocarbon molecules such as (anthracene, toluene, and benzene).