Novel Lipophilic Lanthanide Bis-Phthalocyanines Functionalized by Pentadecylphenoxy Groups: Synthesis, Characterization and UV-PhotostabilityReport as inadecuate




Novel Lipophilic Lanthanide Bis-Phthalocyanines Functionalized by Pentadecylphenoxy Groups: Synthesis, Characterization and UV-Photostability - Download this document for free, or read online. Document in PDF available to download.

1

Faculty of Chemistry, Opole University, ul. Oleska 48, 45-052 Opole, Poland

2

Department of Engineering for Innovation, University of Salento, Via Arnesano, 73100 Lecce, Italy





*

Author to whom correspondence should be addressed.



Abstract Novel sandwich-type phthalocyanines containing a rare earth metal core Pr, Nd, Eu–Lu and macrocycles peripherally substituted by pentadecylphenoxy groups were synthesized using a cardanol-based phthalonitrile precursor and the respective lanthanide acetate. Additionally, the metal free-base analog compound was studied for comparison. The purified reaction products were all found to be thick and viscous substances at room temperature, showing liquid crystalline behavior with a distinct increase in fluidity at ca. 40 °C. The complexes are readily soluble in chloroalkyl solvents and dissolve fairly well in DMF with some tendency to form aggregates. Besides they are strongly hydrophobic and reveal a peculiar affinity for lipophilic media. The compounds have been characterized by UV-Vis absorption and emission, FTIR, MS and DSC methods. Photochemical activity in the liquid phase dimethylformamide, dichloromethane, mineral oil and the degree of photodegradation demonstrated under constant UV-irradiation λ = 352 nm have been analyzed and discussed in terms of photostability.

Keywords: lanthanide bis-phthalocyanines; cardanol; UV-Vis spectroscopy; photostability lanthanide bis-phthalocyanines; cardanol; UV-Vis spectroscopy; photostability





Author: Rudolf Słota 1,* , Gabriela Dyrda 1, Maria Hofer 1, Giuseppe Mele 2, Ermelinda Bloise 2 and Roberta del Sole 2

Source: http://mdpi.com/



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