Optical Properties and Supramolecular Organization of Mix-Substituted Phthalocyanine Holmium Complex in Langmuir-Schaefer Films

Аlexander V. Kazаk,^a@ Nadezhda V. Usol’tseva,^a Antonina I. Smirnova,^a Yulia А. Dyakova,^b,c Маrgarita А. Маrchenkova,^b,c Boris V. Nabatov,^с Еlena Yu. Tereschenko,^b,c and Igor V. Kholodkov^d

^aResearch Institute of Nanomaterials, Ivanovo State University, 153025 Ivanovo, Russia

^bNational Research Centre “Kurchatov Institute”, 123182 Moscow, Russia

^cA.V. Shubnikov Institute of Crystallography of Russian Academy of Sciences, 119333 Moscow, Russia

^dResearch Institute of Macroheterocyclic Сompounds, Ivanovo State Universit y of Chemistry and Technology, 153000 Ivanovo, Russia

^@Corresponding E-mail: alexkazak86@gmail.com

The structural and functional properties of new mix-substituted phthalocyanine holmium complex the thin films (1,4,8,11,15,18-hexaoctyloxy-23,24-dichlorophthalocyaninate hydroxyholmium) (A₃B-Ho type) obtained under different initial conditions, were studied by optical methods and atomic force microscopy. The surface morphology of thin film samples was determined by atomic force microscopy using the tapping mode. Analysis of the internal structure homogeneity of the films via the spatial distribution of the fluorescent signal was fulfilled by confocal microscopy. We have studied the conditions of the floating layers formation and transferring them onto a solid substrate by Langmuir-Schaefer technique. The optical properties of the films were studied by spectrophotometry and spectrofluorometry. Selection of conditions of floating layers formation and their transfer onto the solid substrate under the constant control of the supramolecular organization in the films has allowed us to solve the problem of displaying the fluorescent properties in the films of the holmium complex with mix-substituted phthalocyanine (A₃B-Ho type), in contrast to previously investigated phthalocyanine derivatives of A₃B, ABAB or AABB types, which have not indicated the fluorescence in films.

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Optical Properties and Supramolecular Organization of Mix-Substituted Phthalocyanine Holmium Complex in Langmuir-Schaefer Films

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