Abstract
An O2S2-macrocycle L incorporating three aromatic subunits was synthesized and structurally characterized by X-ray analysis. Four coordination polymers of L with copper(I) halides (Cl, Br and I) adopting different topologies and network patterns depending on the anions are reported. Reactions of L with copper(I) chloride and copper(I) bromide yielded a single-stranded one-dimensional (1D) coordination polymer [CuCl2(L)(CH3CN)]n (1) with an oxidized copper(II) centre and a double-stranded 1D coordination polymer [(Cu2Br2)(L)2]·4CH2Cl2]n (2), with each strand linked by a rhomboid-type Cu2Br2 unit. However, the reaction with copper(I) iodide under the same conditions gave an emissive mixture of supramolecular isomers with an identical composition {[Cu4I4(L)2]·CH2Cl2}n, adopting a regular (3a) and a tilted (3b) square-grid-type 2D coordination polymers via cubane-type Cu4I4 linking. The XRPD results also confirmed the binary mixture. The conformational diversity in the ligand leads to a variation in overall structural motifs of the supramolecular isomers.
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