Organization of triazolephthalocyanines in Langmuir–Blodgett films

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Abstract
Langmuir monolayers were prepared using a new class of non-centrosymmetric macrocycles, the triazolephthalocyanines, differently substituted with aliphatic chains and/or thiophene subunits. Different monolayer behaviour and film deposition have been observed among the different macrocycles. Compounds substituted with two long aliphatic chains on the isoindole ring opposite to the triazole unit have shown the best monolayer behaviour. Stable monolayers were successfully transferred onto CaF 2 substrates which had been made hydrophobic. The Langmuir–Blodgett films were characterized by IR and UV–VIS linear dichroism. In-plane orientation of some of the macrocycles was observed when nickel(ii) acetate was added to the aqueous subphase.

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