Cyclic triimidazole (C9H6N6, 1) has been known since 1973 [1]. Despite this, the scarce availability of its precursors together with tedious synthetic protocols, constituted a major impediment in its use. A simple procedure for the preparation of fairly good quantities of 1 has been reported only recently [2], allowing further investigations on its properties and reactivity. One of the interesting features of this ligand is the presence of three nitrogen atoms with idealized D3h symmetry that can be used in the synthesis of coordination compounds, thus making 1 an appealing tecton for molecular design. In this regard, we have investigated the coordination ability of 1 toward copper(I) derivatives, which are known to display a rich structural chemistry due to the d10 electronic configuration of the metal ion [3]. Moreover, besides the number of different structural motifs obtainable by simply varying reaction conditions, many Cu(I) derivatives display tunable phosphorescent emission at room temperature and a long luminescence lifetime that can be affected by external stimuli such as temperature and pressure [3].     Here we report the results of our investigations on the reactivity of 1 with copper(I) halides (CuX, with X = I, Br) which, by changing the reaction conditions (i.e. solvent, temperature), afforded a variety of structural types, namely: 1D, 2D and 3D polymeric networks. The photophysical characterization of the coordination polymers was performed in the solid state, showing a different emission behavior for the various networks.