Synthesis, structural investigations and magnetic properties of dipyridinated manganese phthalocyanine, MnPc(py)2

Only Ku-band microwave absorption by Fe3O4/ferrocenyl-CuPc hybrid nanospheres

“…As reported in Fig. 5(a), the dielectric relaxation of the hybrids is consistent with the Debye model due to the single Cole-Cole semicircle of the plotting of e 00 versus e 0 [34]. According to the previous reports, there are many factors making contributions to the magnetic loss, such as magnetic hysteresis, eddy current loss, and domain-wall displacement [35].…”

Synthesis and Characterization of Some Five-Coordinated Tetraazaporphyrin and Phthalocyanine Manganese(III) Complexes

“…[29] According to paper [16] there is intramolecular electron transfer resulting in the formation of two new forms of Mn II complex -the radical-cation Pc +• Mn I ⋅nPy and radicalanion Pc -• Mn III ⋅nPy, which are confirmed by UV-vis spectra (λ max 560, 880 and 480, 840 nm, correspondingly). The possibility of formation of the μ-oxo complex (MnPcPy) 2 O was shown in paper [30] . However, it takes place when PcMn is dissolved in pyridine solution, but not in the process of the macrocycle complexation with Mn II salt.…”

Isomorphic complexes formed by recrystallisation of M(II)Pc (M(II)=Mg, Mn and Zn) in liquid 2-amino-3-picoline

“…The exposure of MnPc(2A3P) in pyridine solution on the air condition transforms the Mn complex into the l-oxo-bis[phthalocyaninato(2-)]manganese(III) complex as a result of the oxidation [18]. These processes have been described in details in the previous paper [9]. In the case of ZnPc(2A3P) in pyridine solution are no observed any change during expose on air or moist atmosphere.…”

“…The obtained MgPc(2A3P) Â 2A3P, MnPc(2A3P) Â 2A3P and ZnPc-(2A3P) Â 2A3P crystals are stable under air atmosphere, but in solution, the M(II)Pc(2A3P) complexes are moderately stable due to the exchange of the axial ligand. In the case of Mg and Mn complexes in dry pyridine the exchange of 2A3P to pyridine leads to the formation of biaxially coordinated MgPc(py) 2 [8] and MnPc(py) 2 [9], while in the case of Zn to the monoaxially coordinated ZnPc(py) complex [10,15]. The equilibrium between the form of the complexes in pyridine solution strongly depends on the environment conditions, like moist atmosphere, or on the expose to air.…”

“…As concerns the MgPc, MnPc and ZnPc compounds, they all show similar columnar stacks of the molecules in the solid from [5][6][7]. However, in the case of the structures of their additive complexes with N-donating bases, only the biaxial (4 + 2) complexes of MgPc and of MnPc, and monoaxial (4 + 1) in case of ZnPc are known from the X-ray diffraction studies [8][9][10]. By analogy with these experimental results, one could expect that with 2-amino-3-picoline (2A3P) the respective M(II)Pc complexes, showing the similar central M coordination geometries, corresponding to coordination number 4 + 2 for Mg(II) and Mn(II), but 4 + 1 for Zn(II) would be formed.…”