Synthesis, structure and dielectric properties of the 2D K-tetrazole complex [K_2(4-TPA)_2(H_2O)_2]n

摘要

The 2-D K(I)-tetrazole metal-organic complex, [K_2(4-TPA) _2(H_2O)_2]., (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-(1H-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.