Novel copper(I) complexes with extended pi. . .pi interactions: Synthesis, structure, characterization and spectroscopic properties

作者：Huang Ting Hong; Zhang Min Hua^*

来源：Inorganica Chimica Acta, 2014, 416: 28-34.

DOI：10.1016/j.ica.2014.03.011

• Copper(I) complexes
• pi-pi Stacking
• Crystal structure
• Optical properties

Based on ligand N,N'-bis(pyridin-2-ylmethylene) biphenyl-4,4'-diamine (pmbb), two compounds of [Cu-2 (pmbb)(CH3CN)(2)(PPh3)(2)](ClO4)(2 center dot)2DMF (1) and [Cu-2(pmbb) (PPh3)(2)(Cl)(2)] (2) have been synthesized and structurally characterized by IR, H-1 NMR, P-31 NMR and X-ray crystal structure analysis. Structural analysis reveals that both of these complexes contain the 1D embrace arrays, with different variations in p-stacking patterns and intermolecular C-H . . . pi interactions. Crystal structure of 1 contains 1D tape-like arrays constructed by C-H . . . pi and pi . . . pi interactions, and the ordered-layer-lattice DMF and ClO4 are located between one-dimensional arrays. For 2, pi-stacking interactions lead to the construction of 1D arrays and 2D sheet. The UV-Vis absorption spectra of complexes 1 and 2 reveal that pi-stacking types may play an important role in optical absorption. DFT studies indicate the stability may be 2 > 1. In addition, the emission spectrum of complex 1 in acetonitrile solvent and thermogravimetric analysis of 2 are also observed.

• 出版日期2014-5-24
• 单位天津大学