28191-29-9Relevant articles and documents
New Cyanoarylporphyrazines with High Sensitivity of Photophysical Parameters to Viscosity as Promising Agents for Photodynamic Therapy
Balalaeva, I. V.,Boyarskii, V. P.,Klapshina, L. G.,Ladilina, E. Yu.,Lermontova, S. A.,Lyubova, T. S.,Plekhanov, V. I.
, p. 249 - 256 (2020)
Abstract: Photophysical properties and photodynamic activity for a series of cyanoarylporphyrazine pigments have been analyzed depending on the nature of the substituents and their position in the aromatic ring. Replacement of the fluorine atom in the par
Equilibrium acidities of superacids
Kuett, Agnes,Rodima, Toomas,Saame, Jaan,Raamat, Elin,Maeemets, Vahur,Kaljurand, Ivari,Koppel, Ilmar A.,Garlyauskayte, Romute Yu.,Yagupolskii, Yurii L.,Yagupolskii, Lev M.,Bernhardt, Eduard,Willner, Helge,Leito, Ivo
supporting information; scheme or table, p. 391 - 395 (2011/04/17)
In this paper, we report the most comprehensive equilibrium superacidity scale that is available to date. Contrary to most of the past works, this scale is set up in a medium of constant composition and the obtained acidity values characterize the acidities of molecules rather than acidities of media. The current scale is thus complementary to the well-known H0 scale in the information that it provides. The solvent used is 1,2-dichloroethane (DCE). DCE has very weak basic properties (but sufficiently high polarity) and is an appropriate solvent for measuring acidities of very strong acids of diverse chemical nature. DCE acidities of well-known superacids (CF3SO 2OH, (CF3SO2)2NH, cyanocarbon acids, etc.) as well as common mineral acids (H2SO4, HI, HBr, etc.) are reported. Acidities of altogether 62 acids have been determined from 176 interlinked relative acidity measurements. The scale spans 15 orders of magnitude (from picric acid to 1,1,2,3,3-pentacyanopropene) and is expected to be a useful tool in design, use, and further acidity measurements of superacidic molecules.
