Luminescent properties of heterotrinuclear 3d-4f complexes constructed from a naphthalenediol-based acyclic bis(salamo)-type ligand

Heterotrinuclear 3d-4f metal complexes with an naphthalenediol-based acyclic bis(salamo)-type ligand have been synthesized and structurally characterized. The coordination modes of three acetate ions are different in the complexes 1-3. Spectral titration clearly shows that the heterotrinuclear complexes [Zn2(L)La(OAc)3] (1), [Zn2(L)Ce(OAc)3] (2) and [Zn2(L)Dy(OAc)3(CH3OH)]·CH2Cl2 (3) were acquired by the substitution reaction of the reported homotrinuclear Zn(II) complex with 1 equiv. of Ln(NO3)3 (Ln3 + = La3 +, Ce3 + and Dy3 +).125