Journal
APPLIED SURFACE SCIENCE
Volume 545, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.148993
Keywords
Slipped-cofacial J-type phthalocyanine dimers; Floating layers; Langmuir-Schaefer films; Supramolecular organization; UV/Vis/NIR spectral studies; Femtosecond nonlinear absorbance
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Funding
- Ministry of Education and Science of the Russian Federation [FZZM2020-0006, 075-03-2020-046/1]
- Ministry of Science and Higher Education
- RFBR [19-03-00763a, 19-57-04002bel_mol_a, 20-07-00181a]
- Russian Federation [MK3767.2019.9]
- [0090-2019-0003]
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Based on a comprehensive theoretical and experimental approach, a low-defect thin film of stable dimeric phthalocyanine zinc complex was prepared, showing a tendency towards ordered H-aggregation. The research also demonstrated the potential applications of the material in mixed two- and three-photon absorption and nonlinear attenuation of intense irradiation.
Based on a comprehensive theoretical and experimental approach, a low-defect thin film of stable dimeric phthalocyanine zinc complex (bis[2-hydroxy-9(10),16(17), 23(24)-tri-tert-butylphthalocyaninel zinc - J-[(PcZn)-Pc-OH-Zn-t](2)) was prepared. It is shown that the dye forms stable amorphous edge-on monolayers at the air/water interface with an insignificant content of cylindrical 3D aggregates. These floating layers keep their structure when transferred by the Langmuir-Schaefer method onto a solid substrate, demonstrating a tendency towards ordered H-aggregation with preserving their linear molecular properties. Mixed two- and three-photon absorption of femtosecond laser pulses (280 fs) was firstly detected on this sample, as well as the ability of a material to the nonlinear attenuation of the intense irradiation, which is important for optical limiting.
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