Chlorosubstituted Copper Phthalocyanines: Spectral Study and Structure of Thin Films

• Published in: Molecules (Basel, Switzerland) Vol. 25; no. 7; p. 1620
• Main Authors: Sukhikh, Alexandr, Bonegardt, Dmitry, Klyamer, Darya, Krasnov, Pavel, Basova, Tamara
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01-04-2020; MDPI
• Subjects: Chlorides - chemistry; Chlorine; Copper; Crystal growth; Crystal structure; Crystallites; Crystallography; Crystallography, X-Ray; Crystals; DFT calculations; Glass substrates; Indoles - chemistry; Infrared spectroscopy; Investigations; Models, Molecular; Molecular Conformation; Molecular Structure; Organometallic Compounds - chemistry; phthalocyanines; Polycrystals; Raman spectra; Raman spectroscopy; single crystal structure; Single crystals; Spectrum Analysis, Raman; Sublimation; Substrates; Thin films; Transistors; Vacuum; vibrational spectra; X-ray diffraction; phthalocyanines; X-ray diffraction; single crystal structure; vibrational spectra; DFT calculations; thin films
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules25071620

In this work, the tetra-, octa- and hexadecachloro-substituted copper phthalocyanines CuPcCl
(where x can equal 4, 8 or 16) were investigated by the methods of vibrational (IR and Raman) spectroscopy and X-ray diffraction. The assignment of the most intense bands, both in IR and Raman spectra, was carried out on the basis of DFT calculations. The structure of a CuPcCl
single crystal grown by sublimation in vacuum was refined for the first time. The effect of chloro-substitution on the structure of CuPcCl
thin films deposited in a vacuum onto a glass substrate at 50 and 200 °C was studied. It was shown that CuPcCl
formed polycrystalline films with the preferential orientation of the (100) crystallographic plane of crystallites parallel to the substrate surface when deposited on a substrate at 50 °C. Introduction of more Cl-substituents into the phthalocyanine macrocycle leads to the formation of amorphous films on the substrates at 50 °C. At the elevated substrate temperature, the growth of polycrystalline disordered films was observed for all three copper phthalocyanines.