Structure and Dual Emission of a Heteropentanuclear Er4Yb Complex

By virtue of versatile coordination modes of 8-hydroxyquinoline and acetate, a new mixed lanthanide complex Er4Yb, {[Er2(hfac)4(μ3-CH3COO)(μ3-OH)]2}{μ-HMq}2{Yb(hfac)(μ4-CH3COO)2} (hfac− = hexafluoroacetylacetonate; HMq = 2-methyl-8-hydroxyquinoline) was isolated. The luminescence measurements show that upon irradiation with [n → π*] absorption of HMq at λex = 400 nm, “dual emission” from both erbium (III) and ytterbium (III) has been achieved, respectively.