New mixed valence defect dicubane cobalt(II)/cobalt(III) complex: Synthesis, crystal structure, photoluminescence and magnetic properties

A new defect dicubane cobalt(II)/cobalt(III), [(CoII2CoIII2L4 2(H2O)(CH3COO)(CH3COOH]. 4H2O (1) where H2L = [1-(3-hydroxypropyliminomethyl)naphthalene-2-ol], has been synthesized and structurally characterized. The solid state photoluminescence properties of complex (1) display red emission while H2L exhibits blue emission at room temperature. Variable-temperature magnetic susceptibility measurements on the complex (1) in the range 2-300 K indicate a antiferromagnetic interaction.113