%0 Generic %A Hou, Lei %A Shi, Wen-Juan %A Wang, Yao-Yu %A Wang, Hai-Hua %A Cui, Lin %A Chen, Peng-Xiang %A Shi, Qi-Zhen %D 2011 %T Trinuclear-based Copper(I) Pyrazolate Polymers: Effect of Trimer π-Acid···Halide/Pseudohalide Interactions on the Supramolecular Structure and Phosphorescence %U https://acs.figshare.com/articles/dataset/Trinuclear_based_Copper_I_Pyrazolate_Polymers_Effect_of_Trimer_Acid_Halide_Pseudohalide_Interactions_on_the_Supramolecular_Structure_and_Phosphorescence/2701003 %R 10.1021/ic101901w.s002 %2 https://acs.figshare.com/ndownloader/files/4376950 %K Supramolecular Structure %K solvothermal reactions %K UV radiation %K room temperature %K 2I %K 3N %K HL %K SCN %K Cu 2X motifs %K CuX 2 %K ligand charge transfer %K Cu 3 units %K building units %K complexes exhibit %K pyridyl groups %K novel sandwich substructures %X Under different situations, solvothermal reactions of 3,5-diethyl-4-(4-pyridyl)-pyrazole (HL) with CuX or CuX2 (X = Cl, Br, I, and SCN) afforded five copper(I) coordination polymers, {CuX[CuL]3·solvent}n (X = Cl, 1; Br, 2; I, 3; X = SCN and solvent = MeCN, 4) and {Cu2I2[CuL]3}n (5). X-ray diffraction analyses show that all the complexes have trinuclear [CuL]3 (referred as Cu3) secondary building units featuring planar nine-membered Cu3N6 metallocycles with three peripheral pyridyl groups as connectors, which are further linked by CuX or Cu2X2 motifs to generate single- or double-strand chains. Interestingly, the Cu(I) atoms within the Cu3 units in 15 behave as coordinatively unsaturated π-acid centers to contact soft halide/pseudohalide X atoms of CuX and Cu2X2 motifs, which lead to novel sandwich substructures of [(Cu3)(Cu2X2)(Cu3)] (X = Br, I, and SCN) in 24. In addition, both the π-acid [Cu3]···X contacts and intertrimer Cu···Cu interactions contribute to the one-dimensional (1D) double-strand and 2D/3D supramolecular structures of 15. All of these complexes exhibit high thermostability and bright solid-state phosphorescence upon exposure to UV radiation at room temperature. The emissions arise from the mixtures of metal-centered charge transfer, metal to ligand charge transfer, and halide-to-ligand charge transfer excited states, and can be tuned by intermolecular π-acid [Cu3]···halide/pseudohalide contacts. %I ACS Publications