2158-79-4Relevant academic research and scientific papers
PHENAZINE-BASED COMPOUNDS AND USE THEREOF AS REDOX FLOW BATTERY ELECTROLYTE
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Page/Page column 63-64, (2021/08/27)
The present invention relates to novel phenazine-based compounds of formula (l)(a) and (l)(b) and compositions comprising the same and their use as redox flow battery electrolytes.(l)(a), (l)(b)
HALOGENATED BENZOXAZINES AND THEIR USE
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Paragraph 0141; 0142; 0143; 0144, (2015/06/24)
The present invention relates to novel halogenated benzoxazines, methods for their production, their use for the diagnosis of diseases and their use for the production of medicaments for the diagnosis of diseases, preferably dementia diseases and in parti
Quinone-quinol equilibria in solutions of 2-(β-hydroxyethyl)amino-benzo-1,4-quinones. A spectrophotometric and polarographic study
Berg, Hermann,Zuman, Petr
, p. 1459 - 1464 (2007/10/03)
2-(β-Hydroxyethyl)aminobenzo-1,4-quinones are electrochemically reduced in two steps. The more positive wave corresponds to the reduction of the quinone form, the second at a potential more negative by 0.7 V is attributed to the reduction of the less conjugated quinol. Electronic spectra enabled determination of equilibrium constants (K = [quinone]/[quinol]) as well as the equilibrium constants for the addition of hydroxide ions to the 1-carbonyl group. Changes of polarographic limiting current with pH indicated that the conversion of the quinone into quinol is base catalyzed. The addition of OH- ions is followed by a ring formation, resulting from an attack of the -O- group on the β-carbon in the side chain. Structural effects on the measured overall constant K indicate that substituents on the quinone ring and in the side chain exert different effects on addition of OH- and on the rate-determining step. Oxidation-reduction potentials of these quinones follow linear free energy relationships as expected. As 2-(β-hydroxyethyl)aminobenzoquinones are formed by hydrolysis of ethyleneiminoquinones, used as cancerostatics, observed equilibria may occur under physiological conditions.
