Synthesis, structure and dielectric constant properties of a novel 1D coordination polymer[K(2-PTA)(H2O)]n

The fern-like 1D coordination polymer, [K(2-PTA)(H2O)]n (1), which is constructed by an inorganic skeleton chain [KO2]n with organic 2-PTA wings on both sides, has been synthesized and characterized by single crystal X-ray crystallography and dielectric constant (ε) measurement (2-PTA = 2-(5-(pyridin-2-yl)-2H-tetrazol-2-yl) acetic acid). The ε of temperature dependence maintains unchanged, and ε of frequency dependence shows a significant decline, which is attributed to the highly ordered polarization mechanism.

Graphical abstractSolvothermal treatment of KOH and 2-(5-(pyridin-2-yl)-2H-tetrazol-2-yl) acetic acid at 140 °C for 3 days produced a 1D metal–organic framework [K(2-PTA)(H2O)]n (1) in which [KO2]n chain acts as inorganic skeleton. The compound 1 shows a maximum ε1 value 38.9 (200 Hz), which drops to 4.6 at a relatively high frequency of 1 MHz.Figure optionsDownload full-size imageDownload as PowerPoint slide