35754-82-6Relevant articles and documents
1,2,5-chalcogenadiazole-annulated tripyrazinoporphyrazines: Synthesis, spectral characteristics, and influence of the heavy atom effect on their photophysical properties
Svec, Jan,Zimcik, Petr,Novakova, Lucie,Rakitin, Oleg A.,Amelichev, Stanislav A.,Stuzhin, Pavel A.,Novakova, Veronika
, p. 596 - 604 (2015/01/30)
A series of low-symmetry ZnII, MgII, and metal-free porphyrazine derivatives with one 1,2,5-chalcogenadiazole ring (with S, Se or Te) and three pyrazines bearing tert-butylsulfanyls were synthesized. The absorption maxima of ZnII complexes lay at 660, 674, and 707 nm for S, Se, and Te, respectively, indicating increasing contribution of the 1,2,5-chalcogenadiazole rings to the π-electronic system. Photophysical studies revealed that introduction of Se as a chalcogen and ZnII as a central metal causes an increase in the singlet oxygen quantum yield, reaching a value of 0.81, whereas the combination of S and MgII gives only 0.39. This takes place on the account of the fluorescence quantum yields that differ significantly from 0.072 (ZnII+Se) to 0.51 (MgII+S). These results demonstrated the two-dimensional heavy atom effect combining the role of the chalcogen (first dimension) as well as the central metal (second dimension). Attempts to prepare oxygen-containing isologues led to the formation of an unexpected side product.
Synthesis, photophysical and electrochemical properties of a D-σ-A ensemble derived from porphyrazine and tetrathiafulvalene
Hou, Ruibin,Qiu, Han,Chen, Tie,Yin, Bingzhu
experimental part, p. 1799 - 1805 (2009/12/07)
Cis/trans 1,2-dicyanoethylenes bearing tetrathiafulvalene units linked by a ethylenedithio spacer were prepared. The eis isomer was converted to eight tetrathiafulvalene unit substituted magnesium porphyrazine upon a metal-templated cyclotetramerization with magnesium propoxide in propanol. The dicyanoethylenes and target compound were characterized by EA, NMR, and MALDI-TOF mass and photophysical and Electrochemical properties were discussed.
Process for the preparation of pure alkaline earth alkoxides
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Page/Page column 3; 4, (2008/06/13)
Production of a metal-free Group II alkaline earth dimethanolate involves alcoholysis of the corresponding diethanolate with an excess of methanol.