51802-32-5Relevant academic research and scientific papers
Synthesis, characteristics and photochemical studies of novel porphyrazines possessing peripheral 2,5-dimethylpyrrol-1-yl and dimethylamino groups
Szczolko, Wojciech,Sobotta, Lukasz,Fita, Piotr,Koczorowski, Tomasz,Mikus, Michal,Gdaniec, Maria,Orzechowska, Aleksandra,Burda, Kvetoslava,Sobiak, Stanislaw,Wierzchowski, Marcin,Mielcarek, Jadwiga,Tykarska, Ewa,Goslinski, Tomasz
, p. 2040 - 2044 (2012)
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.
Chemistry of diaminomaleonitrile: Synthesis and structure of two unexpected products from its condensation with 2,5-hexanedione
Mague, Joel T.,Eduok, Etim E.
, p. 311 - 320 (2000)
For the synthesis of precursors to cellulose-based ion exchange materials, the condensation of diaminomaleonitrile with 2,4-pentanedione and 2,5-hexanedione was explored. Whilst the former diketone yielded the expected 1,4-diazepine (2), the latter gave either a pyrrole derivative (3) or an unusual triazabicyclononene (4), depending on the conditions used. Compound 2 crystallizes in the monoclinic space group P21/c with a = 8.9313(10) A, b = 9.0370(7) A, c = 11.4448(9) A, β= 102.48(8)°, V = 901.89(14) A3, and Z = 4. Compound 3 crystallizes in the orthorhombic space group Pna21 with a = 12.0342(8) A, b = 8.3760(8) A, c = 10.7026(11) A, V = 1078.81(17) A3, and Z = 4. Compound 4 crystallizes in the monoclinic space group P21/c with a = 9.0157(5) A, b = 13.5374(9) A, c = 12.8751(16) A, β= 99.506(5)°, V = 1549.82(15) A3, and Z = 4. In both 3 and 4 the aminovinyl substituent shows evidence for involvement of the lone pair on nitrogen with the carbon π-system. Also, 3 and 4 are highly associated in the solid state via hydrogen bonding.
