Hydrothermal synthesis and crystal structure of a mixed-valence Cu(I)/Cu(II) complex: [Cu4(ophen)4(mtp)] (Hophen=2-hydroxy-1,10′-phenanthroline, mtp=2-methyl-terephthalate acid)

A new organic-inorganic hybrid mixed-valence Cu(I)/Cu(II) complex [Cu4(ophen)4(mtp)] (1) (Hophen=2-hydroxy-1,10′-phenanthroline, mtp=2-methyl-terephthalate acid) has been hydrothermally synthesized and characterized by XPS spectrum, FTIR spectrum and X-ray single-crystal diffraction. Compound 1 belongs to monoclinic system, space group P2(1)/n, a=10.281(2), b=15.188(3), c=15.333(3) Å, β=105.072(3)°, V=2311.8(8) Å3, Z=2, R1=0.0441. Compound 1 consists of two Cu2(ophen)2+ building units linked by mtp ligand to form a dumbbell shape.