Title of article :
Synthesis, characteristics and photochemical studies of novel porphyrazines possessing peripheral 2,5-dimethylpyrrol-1-yl and dimethylamino groups
Author/Authors :
Piotr and Szczolko، نويسنده , , Wojciech and Sobotta، نويسنده , , Lukasz and Fita، نويسنده , , Piotr and Koczorowski، نويسنده , , Tomasz and Mikus، نويسنده , , Michal and Gdaniec، نويسنده , , Maria and Orzechowska، نويسنده , , Aleksandra and Burda، نويسنده , , Kvetoslava and Sobiak، نويسنده , , Stanislaw and Wierzchowski، نويسنده , , Marcin and Mielcarek، نويسنده , , Jadwiga and Tykarska، نويسنده , , Ewa a، نويسنده ,
Abstract :
The synthesis and physicochemical properties of novel porphyrazines possessing an alternate system of two peripheral substituents, 2,5-dimethylpyrrol-1-yl and dimethylamino, are presented. All the macrocycles were subjected to HPLC purity studies. Spectroscopic studies of magnesium(II) porphyrazine encompassed steady state absorption, emission measurements, including fluorescence decays, transient absorption spectra, and thermoluminescence. Additionally, magnesium(II) porphyrazine was found to be a moderate photosensitizer with singlet oxygen generation values of 0.12 and 0.14 in DMF and DMSO, respectively. Comparison of the quantum yields of singlet oxygen generation before and after deoxygenation showed that the photodynamic effect of magnesium(II) porphyrazine is governed by the photosensitization mechanism II. Magnesium(II) and manganese(III) porphyrazines were characterized using X-ray crystallography.
Keywords :
Linstead macrocyclization , Porphyrazine , singlet oxygen , X-Ray , photochemistry
