Synthesis, Crystal Structure, and Properties of a Dinuclear Cu(I) Cluster

• Published in: Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2013-10, Vol.188 (10), p.1340-1350
• Main Authors: Huo, Lili, Chai, Wenxiang, Song, Li, Zhang, Xiaoli, Tian, Qingxia, Liang, Jiaping, Shi, Hongsheng, Shu, Kangying
• Format: Article
• Language: English
• Subjects: Copper; Crystal structure; Dinuclear copper(I) cluster; Ligands; luminescence; substituent of triarylphosphine ligand; supramolecular; Thermogravimetric analysis
• ISSN: 1042-6507; 1563-5325
• DOI: 10.1080/10426507.2013.765875

A new dinuclear copper(I) cluster complex, [(o-Tol) 3 PCuI 2 CuP(o-Tol) 3 (DMF)] (1) ((o-Tol) 3 P = tris(2- methylphenyl)phosphine, DMF = N, N′-dimethylformamide), has been synthesized and the crystal structure was determined by a single-crystal X-ray diffraction study. The dinuclear copper(I) cluster molecule containing an asymmetric Cu 2 I 2 P 2 O core and the dinuclear clusters are fused together by a strong π-π stacking interaction to form asupramolecular one-dimensional (1D) chain. After having compared the relevant complexes composed of CuI and monodentate triarylphosphine ligands, the impact of the substituent of the triarylphosphine ligand to the subsequent complex structure has also been discussed.Except for a strong π-π* bond, the complex 1 also exhibits a weak metal-to-ligand charge transfer (MLCT) absorption bond in the 430-530-nm region and displays a weak green-yellow emission when irradiated by ultraviolet (UV) light. The thermogravimetric analysis demonstrates that its thermal stability is good, and the corresponding PXRD analysis has revealed that the final, organic-free decomposed product is CuI.