Abstract
The reaction of an Eu(III) complex of the protonated form of the macrocyclic Schiff base derived from 1,3-diamino-2-hydroxypropane and 2,6-diformylphenol, [Eu(H4L)Cl3], with three equivalents of base results in a mononuclear complex of the triply deprotonated form of the ligand, [Eu(HL)]. The photophysical properties of the [Eu(HL)] complex are discussed on the basis of emission and excitation spectra, as well as of the emission decay times. The [Eu(HL)] complex in a reaction with cobalt(II) chloride gives a heterometallic Eu(III)-Co(II) macrocyclic complex, [EuCo(HL)(CH3OH)2Cl]2Cl2·4CH3OH. In the presence of base and an excess of cobalt(II) chloride the starting [Eu(H4L)Cl3] complex is converted to a dinuclear Co(II) complex, [Co2(H2L)Cl2(CH3OH)2]·1.5CH3OH.
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