A novel stable Cu-I complex based on an unconjugated bisanthryl-tethered diimine ligand with tri-coordinate mode

摘要

The first air-stable mononuclear Cu-I complex (1) based on an unconjugated bisanthryl-tethered diimine ligand has been synthesized and characterized by elemental analysis, ESI-MS, UV-vis, FT-IR spectra and TGA analysis. X-ray diffraction analysis at room temperature reveals that complex 1 crystallizes in a monoclinic system, space group P2(1)/c with a=15.611(3) angstrom, b=24.412 (5) angstrom, c=15.430 (6) angstrom, beta=114.49 (3)degrees, V=5351.3 (19) angstrom(3), rho(calc)=1.359 g cm(-3), mu=0.472 mm(-1) and Z=4. The crystal structure of 1 features a mononuclear tricoordinated complex with a distorted triagonal planar geometry. The Cu-I center is coordinated to three imine N atoms of two Schiff base ligands, while the remaining one imine N atom keeps uncoordinated. UV-vis absorption and emission spectra indicate that the complexation of metal ion has slight influence on the electronic structure of the ligand. TGA analysis confirms that complex 1 is stable up to 253 degrees C.