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    Thin-film materials based on phthalocyanine derivatives: structure and physico-chemical properties

    Year: 2019

    Authors: Kazak, Alexandr; Marchenkova, Margarita; Smirnova, Antonina; Dubinina, Tatiana; Seregin, Alexey; Rogachev, Alexandr; Usol'tseva, Nadezhda

    Organizations: Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [16.1037.2017/4.6]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-03-00763a, 19-57-04002bel_mol_a]; Russian FederationRussian Federation [MK-3767.2019.9]

    Country: Sevastopol, RUSSIA

    In order to establish the effect of the molecular structure of mix-substituted phthalocyanine derivatives on its supramolecular organization in thin-films, the floating layers of three A(3)B-type phthalocyanine derivatives were obtained. Their supramolecular organization was determined and it was found that the studied compounds form homogeneous stable floating layers on the water surface. Structure parameters of floating layers depend both on the length of aliphatic substituents (R = CnH2n+1) and the metal complexing agent. Ligands I and II form stable monolayer structures, which the layer packing periods increase with the elongation of aliphatic substituents: the lattice parameter (d) is 1.93 and 2.3 nm for ligands I (n = 6) and II (n = 8), correspondingly. During further compression of the formed monolayers, ligands I and II form stable bilayers, in which the arrangement of molecules remains similar to the structure of the previous monolayers. These bilayers contain minor inclusions of 3D aggregates. Metal complex III forms only stable monolayer (d = 2.06 nm), upon further compression of which 3D aggregates included in the monolayer are formed.
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