Switchable Dielectric Materials Based on 2-Methylimidazole

摘要

Two novel coordination polymers with molecular structures(2MI)^+[Zn(2MI)Cl_3]^-(1) and(2MI)^+NO_3^-(2) based on ligand 2-methylimidazole(2MI) were synthesized under solution method. Compound 1 crystallizes in the monoclinic system, space group Cc with a=7.489(2), b=13.448(4), c=13.983(4) ?, β=98.402(2)°, Z=4 and V=102.246(2) ?~3. Compound 2 crystallizes in the orthorhombic system, space group pnma with a=14.296(3), b=6.3180(12), c=7.3862(13) ?, β=90°, Z=4 and V=667.1(2) ?~3. Dielectric measurements show compounds 1 and 2 have reversible dielectric anomalous behaviors with variation frequencies at different temperature.