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Abstract:
Six new composites derived from the intercalation of the MPS3 phases (M
= MnII, CdII) with the macrocyclic manganese(III) complex
[MnL(H2O)(2)].NO3(H2O) (LH2 = Schiff base macrocyclic ligand derived
from the condensation of 2-hydroxy-5-methyl-1,3-benzene-dicarbaldehyde
and 1,2-diamine-benzene) were obtained by two different synthetic
procedures: a conventional and a microwave assisted method. The
composites [MnL](0.25)K0.15Mn0.80PS3(H2O)(-1.0) (1), and
[MnL](0.25)K0.15Cd0.80PS3( H2O)(-0.5) (2) were obtained by the
conventional method, after stirring a suspension of the corresponding
potassium precursor and the macrocyclic complex for two weeks, while
[MnL](0.35)K0.05Mn0.80PS3(H2O)(-1.0) (3) and [MnL]
0.25K0.15Cd0.80PS3(H2O)(-0.5) (4) after stirring for four weeks at room
temperature. Using a microwave assisted reaction permitted to obtain in
a shorter period of time as compared with the conventional method,
composites [MnL](0.20)K0.20Mn0.80PS3(H2O)(-1.0) (5) and
[MnL](0.15)K0.25Cd0.80PS3(H2(O))(-0.5) (6). All the MnIII/MnIII
composites show a bulk antiferromagnetic behavior. However, the
spontaneous magnetization present at low temperature in the potassium
precursor K0.40Mn0.80PS3(H2O)(-1.0) is observable in composite
[MnL](0.20)K0.20Mn0.80PS3(H2O)(-1.0) (5), while it is completely absent
in composites [MnL](0.25)K0.15Mn0.80PS3(H2O)(-1.0) (1) and
[MnL](0.35)K0.05Mn0.80PS3(H2O)(-1.0) (3).
