Two isomorphic hybrids M(en)3Ag2I4 (M = Zn and Ni) showing distinct dielectric feature

Abstract In this paper, the dielectric spectroscopy was studied for two isomorphic hybrids, Zn(en) 3 Ag 2 I 4 and Ni(en) 3 Ag 2 I 4 . Two hybrids show temperature-independent dielectric permittivity and loss with eʹ ≈ 6.7 and eʺ ≈ 0.03 at temperatures below 200 K for Zn(en) 3 Ag 2 I 4 versus eʹ ≈ 1.24 and eʺ ≈ 0.01 at temperatures below 250 K for Ni(en) 3 Ag 2 I 4 , as well as a dielectric anomaly and thermally assisted dielectric relaxation at elevated temperature. The anomaly peak temperature is ca. 300 K for Zn(en) 3 Ag 2 I 4 versus ca. 380 K for Ni(en) 3 Ag 2 I 4 in eʹ-T plots. Additionally, the eʹ value is 3 Ag 2 I 4 , which is a low-κ material. The dielectric property distinction between two hybrids results from their different structural rigidity.