Stabilization of (CuX) (n) Clusters (X = Cl, Br, I; n=2, 4, 5, 6, 8) in Mono- and Dithioether-Containing Layered Coordination Polymers

More than 50 of layered (i.e., 2D) coordination polymers containing (CuX) (n) clusters (X = Cl, Br, I; n = 2, 4, 5, 6, and 8) as secondary building units (SBUs) and mono- and dithioether as assembling ligands are described. This mini-review is separated into two categories; mono- (10) and dithioether (45 polymers), devoted on 2D networks. Within these 55 2D structures visited, the occurrence of the SBU motifs (CuX) (n) where n = 2, 4, 5, 6, and 8 are dominated by the rhomboids (Cu2X2Sx; 30) and the closed and open cubanes (Cu4I4S4; 16). Only 10 different other SBU motifs are found in these 2D materials (note that one polymer shares two different motifs). Some emission properties are also provided. Generally, closed cubane cluster-containing coordination polymers exhibit more intense emissions than the rhomboid dimers, which are very weakly or non-emissive.