title: Synthesis and spectral evaluation of some unsymmetrical mesoporphyrinic complexes.
abstract: Synthesis and spectral evaluation of new zinc and copper unsymmetrical mesoporphyrinic complexes are reported. Zn(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20- tris-(4-carboxymethylphenyl)porphyrin, Zn(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20- tris-(4-carboxymethylphenyl)porphyrin, Cu(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20- tris-(4-carboxymethylphenyl)porphyrin and Cu(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20- tris-(4-carboxymethylphenyl)porphyrin were synthesized using microwave-assisted synthesis. The complexes were characterized by elemental analysis, FT-IR, UV-Vis, EPR and NMR spectroscopy, which fully confirmed their structure. The spectral absorption properties of the porphyrinic complexes were studied in solvents with different polarities. Fluorescence emission and singlet oxygen formation quantum yields were evaluated for the compounds under study, revealing high yields for the zinc derivatives. The copper complexes are not emissive and only display residual capacity for singlet oxygen formation.
authors.affiliation: Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, 6 Traian Vuia St., Bucharest 020956, Romania.
authors.forename: Rica
authors.initials: R
authors.lastname: Boscencu
authors.affiliation: Molecular Physical Chemistry Center, IN-Institute of Nanoscience and Nanotechnology, Technical University of Lisbon, Av. Rovisco Pais, Lisbon 1049-001, Portugal.|School of Technology and Business, Polytechnic Institute of Portalegre, Lugar da Abadessa, Apartado 148, Portalegre 7301-901, Portugal.
authors.forename: Anabela Sousa
authors.initials: AS
authors.lastname: Oliveira
authors.affiliation: Molecular Physical Chemistry Center, IN-Institute of Nanoscience and Nanotechnology, Technical University of Lisbon, Av. Rovisco Pais, Lisbon 1049-001, Portugal.
authors.forename: Diana P
authors.initials: DP
authors.lastname: Ferreira
authors.affiliation: Molecular Physical Chemistry Center, IN-Institute of Nanoscience and Nanotechnology, Technical University of Lisbon, Av. Rovisco Pais, Lisbon 1049-001, Portugal.
authors.forename: Luís Filipe Vieira
authors.initials: LFV
authors.lastname: Ferreira
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D008872:Microwaves; D008968:Molecular Conformation; D026082:Singlet Oxygen / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D015032:Zinc / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D026082:Singlet Oxygen; D003300:Copper; D015032:Zinc