10124-27-3Relevant articles and documents
Mononuclear AlIII, GaIII and InIII, and heterodinuclear GaIIIMII (M = Zn, Cu, Ni, Co) complexes of a tetraiminodiphenol macrocyclic ligand
Dutta, Bula,Bag, Pradip,Nag, Kamalaksha
, p. 1182 - 1188 (2005)
Mononuclear aluminium(III), gallium(III) and indium(III) complexes [M III(LH2)(H2O)Cl](ClO4)2 · nH2O (1-3) of the tetraiminodiphenolate macrocyclic ligand L2- have been synthesized. The two uncoordinated imine nitrogens of these compounds are protonated and hydrogen bonded to the metal-bound phenolate oxygens to stabilize them against hydrolytic cleavage. The gallium(III) compound, 2, forms the heterodinuclear complexes [GaIIIM IIL(μ-OAc)(OAc)(H2O)][ClO4] (M = Co, 4; Ni, 5) and [GaIIIMIIL(μ-OAc)(OAc)][ClO4]. 2H2O (M = Cu, 6; Zn, 7). The presence of the core unit [Ga IIIMIIL(μ-OAc)(OAc)]+ in all the compounds has been ascertained by ESI-MS measurements. Complexes 1-3 show luminescence at room temperature between 505 and 490 nm. Spectrofluorimetric titrations of 2 with Zn(OAc)2 · 2H2O and Cu(OAc)2 · H2O in acetonitrile have shown that the formation of a 1: 1 GaIIIZnII complex occurs with the growth of luminescence intensity, while the formation of a GaIIICuII complex leads to the complete quenching of luminescence. Complexes 1-7 have been further characterized by their proton NMR spectra. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2005.
