title: Indium-chlorine and gallium-chlorine tetrasubstituted phthalocyanines in a bulk system, Langmuir monolayers and Langmuir-Blodgett nanolayers--spectroscopic investigations.
abstract: The paper deals with spectroscopic characterization of metallic phthalocyanines (Pc's) (indium and gallium) complexed with chlorine and substituted with four benzyloxyphenoxy peripheral groups in bulk systems, 2D Langmuir monolayers and Langmuir-Blodgett nanolayers. An influence of the molecular structure of dyes (the presence of metal and of substitutes attached to the phthalocyanine macroring) on the in situ measurements of light absorption is reported. Molecular arrangement of the phthalocyanine molecular skeleton in the Langmuir monolayers on water substrate and in the Langmuir-Blodgett nanolayers is evaluated. A comparison of the light absorption spectra of the phthalocyanine monolayers with the spectra of the dyes in solution supports the existence of dye aggregates in the monolayer. It was shown that the type of dye aggregates (oblique and H types) depends markedly on the dye molecular structures. The NIR-IR, IR reflection-absorption and Raman spectra are also monitored for Langmuir-Blodgett nanolayers in non-polarized and polarized light. It was shown that the dye molecules in the Langmuir-Blodgett layers are oriented nearly vertically with respect to a gold substrate.
authors.affiliation: Faculty of Technical Physics, Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Bursa
authors.affiliation: Faculty of Technical Physics, Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland. Electronic address: danuta.wrobel@put.poznan.pl.
authors.forename: D
authors.initials: D
authors.lastname: Wróbel
authors.affiliation: Faculty of Technical Physics, Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Biadasz
authors.affiliation: Faculty of Technical Physics, Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Kędzierski
authors.affiliation: Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Lewandowska
authors.affiliation: Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Graja
authors.affiliation: Faculty of Technical Physics, Chair of Optical Spectroscopy, Poznan University of Technology, 60-965 Poznań, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Szybowicz
authors.affiliation: Gebze Institute of Technology, Department of Chemistry, Gebze 41400, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Durmuş
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry*; D007204:Indium / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods
chemical_list: D005456:Fluorescent Dyes; D007211:Indoles; D009942:Organometallic Compounds; C515959:phthalocyanine gallium chloride; D007204:Indium; C020758:indium trichloride
keywords: In situ light absorption measurements; Langmuir, Langmuir–Blodgett layer; Metallic phthalocyanine; Molecular aggregation; UV–Vis–NIR–IR–Raman spectra