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A. V. Kazak^1,2*, K. S. Nikitin^3,1, I. S. Chikalov³, T. V. Dubinina⁴, I. V. Kholodkov³, N. V. Usol'tseva¹

Author affiliations
¹Nanomaterials Research Institute, Ivanovo State University,
Ivanovo, Russia
²Moscow Region State University,
Mytishchi, Russia
³Ivanovo State University of Chemistry and Technology,
Ivanovo, Russia
⁴Department of Chemistry, Lomonosov Moscow State University,
Moscow, Russia
*Corresponding author: alexkazak86@gmail.com

Abstract
Floating layers and Langmuir-Schaefer films of 2,3,9,10,16,17,23,24-octa-(3-(ethylthio)phenyl)phthalocyaninate of lutetium acetate were obtained. A floating layer of this compound was modeled and the geometric characteristics of the densest packing on the water surface were calculated. It is shown that the area per one molecule in the densest face-on monolayer packing is equal to 4.94 nm². Analysis of the floating layer compression isotherm, the electron absorption spectra of chloroform solution and thin films, as well as AFM images of the surface relief of Langmuir-Schaefer films showed that at the air/water interface as well as on a solid substrate, molecules are arranged by face-on type. Such organization on the aqueous subphase is probably related to the orienting effect of the acetate residue at the lutetium atom and sulfur atoms. By the method of electron absorption spectroscopy, it was found that the films contain small amount of J-type aggregates.

Keywords: phthalocyanine derivative, floating layers, Langmuir-Schaefer films, supramolecular organization, UV/Vis spectrum, aggregation