The Coordination- and Photochemistry of a New Dinuclear Copper(I) Bis(diphenylphosphino)methane (1 : 2) Complex

• Published in: Russian journal of coordination chemistry 2020-07, Vol.46 (7), p.505-512
• Main Authors: Liu, K. G., Gao, X. M., Li, J. Z., Wei, X. W., Wang, R., Huang, Y., Yan, X. W.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Chloride ions; Coordination compounds; Copper; Crystal structure; Inorganic Chemistry; Methane; Optical properties; Photochemistry; Photoluminescence; Physical Chemistry; Room temperature
• ISSN: 1070-3284; 1608-3318
• DOI: 10.1134/S1070328420070052

In our attempts to identify new species in the preparation of copper(I)-Dppm (Dppm = bis(diphenylphosphino)methane) complexes under the condition of excess Dppm, we isolated and analyzed a new binuclear copper(I)-Dppm complex, namely, [(μ 2 -η 1 ,η 1 -Dppm) 2 Cu 2 (η 1 -Dppm) 2 (μ 2 -Cl)](BF 4 ) ( I ). We report here the synthesis, crystal structure (CIF file CCDC no. 1912269), characterizations by various spectroscopic (IR, 1 HNMR, UV−Vis, powder XRD) techniques and the thermal and luminescent properties of this complex. Its X-ray crystal structure reveals a discrete cationic binuclear copper(I)-Dppm (1 : 2) species for the first time. The binuclear copper centres are bridged by a pair of cis -Dppm molecules and one chloride ion, and further consolidated by two trans -Dppm molecules in mono-dentate fashion. It exhibits cyan photoluminescence in the solid state at room temperature. This work not only addresses the concern of structural information of binuclear copper(I)-Dppm (1 : 2) complex, but also provides a new way to incorporate sterically hindered ligands into the {Cu(μ 2 -η 1 ,η 1 - trans -Dppm) 2 Cu} scaffold for novel luminous properties .