New Framework Iodoargentates: M(en)₃Ag₂I₄ (M = Zn, Ni) with Tridymite Topology

Two novel framework compounds, Zn(en) 3Ag2I4 (1) and Ni(en) 3Ag2I4 (2), have been synthesized by a self-assembly reaction. Both of them contain an unexpected framework, Ag2I4(2-) with tridymite topology, and the discrete M(en)3(2+) cations are located in the channels. Their thermal properties and circular dichroism spectra were investigated.