Synthesis, structure and dielectric properties of the 2D K-tetrazole complex [K 2(4-TPA) 2(H 2O) 2] n

Abstract

The 2-D K(I)-tetrazole metal–organic complex, [K 2(4-TPA) 2(H 2O) 2] n ( 1), which is constructed by the [K 2O 4N] n inorganic skeleton chains bridged by the 4-TPA linkers, has been synthesized and characterized by single crystal X-ray crystallography and temperature-dependence dielectric constant( ε) measurement under the alternating electric field, (4-TPA = 2-(4-(1 H-tetrazol-5-yl)pyridinium-1-yl) acetate). The ε of temperature dependence remains unchanged almost within the measured temperature range of 90 K to 430 K at 1 M Hz, and the ε of frequency dependence shows a significant decline from 6.7 to 4.6 within the measured frequency range of 200–1 MHz at room temperature. And it is consistent with the low dielectric loss ( ε 2/ ε 1) behavior, which is attributed to the highly ordered polarization mechanism.