Zinc(II) mononuclear complexes with Schiff base derivatives of 2-aminofluorene. Synthesis, structural characterization, and optical properties

Three Schiff base ligands derived from 2-aminofluorene and 3-methoxysalicylaldehyde (HL1), 3-ethoxysalicylaldehyde (HL2), or 2-formyl-6-hydroxymethyl-p-cresol (HL3) were synthesized and structurally characterized by X-ray diffraction on single crystals. The mononuclear complexes [Zn(L1)2] (4), [Zn(L2)2] (5), [Zn(L3)2]·CHCl3 (6a), and [Zn(L3)2] (6b) containing the monoanionic form of these ligands were obtained and structurally characterized. Luminescent properties of the ligands and complexes were investigated in solid-state.