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ISSN 1998-9539

Stability of Manganese(II) Phthalocyanine Films in Ambient Air

Pavel A. Yunin,a,b@ Yury I. Sachkov,a,c Vladislav V. Travkin,a,c and Georgy L. Pakhomova,c
aInstitute for Physics of Microstructures of the Russian Academy of Sciences, 603087 Nizhny Novgorod, Russian Federation
bLobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russian Federation
cIvanovo State University of Chemistry and Technology, 153000 Ivanovo, Russian Federation
@Corresponding author E-mail:
Manganese phthalocyanine (PcMn) stands out among the well-known paramagnetic molecules for being both an extraordinary and unsteady complex. These characteristics are likely interrelated, which complicates interpretation of the experimental data. Notably, that conclusion on the PcMn instability follows from the coordination activity and redox-behavior of molecules in solutions, whereas the ‘extraordinary’ magnetic and electric properties are measured in solid samples. In this paper we consider PcMn films that for a month were kept in inert atmosphere as well as in regular laboratory conditions and studied by the optical spectroscopy, X-ray diffraction, secondary ion mass spectroscopy and surface control methods. It is shown that ageing of solid-state PcMn samples affects the molecular packing and microstructure of crystals and causes changes in their surface morphology and impurity concentration. However, these changes are reversible and unrelated to bulk heterogeneous chemical reactions, oxidation in particular.
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