scholarly journals Acid–base and electrochemical properties of manganese meso(ortho- and meta-N-ethylpyridyl)porphyrins: potentiometric, spectrophotometric and spectroelectrochemical study of protolytic and redox equilibria

2010 ◽  
Vol 39 (48) ◽  
pp. 11568 ◽  
Author(s):  
Tin Weitner ◽  
Ana Budimir ◽  
Ivan Kos ◽  
Ines Batinić-Haberle ◽  
Mladen Biruš
Keyword(s):  
Electrochemical Properties ◽  
Acid Base ◽  
Redox Equilibria

Acid−Base and Electrochemical Properties of the MLCT Excited States and One-Electron-Reduced Forms of Ruthenium(II) Complexes Containing 2-(2‘-Pyridyl)pyrimidine and 2,2‘-Bipyridine in Aqueous Solution

1997 ◽  
Vol 36 (11) ◽  
pp. 2252-2257 ◽  
Author(s):  
Fiorella Casalboni ◽  
Quinto G. Mulazzani ◽  
Catherine D. Clark ◽  
Morton Z. Hoffman ◽  
Peter L. Orizondo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Properties ◽  
Excited States ◽  
Acid Base ◽  
Reduced Forms

Influence of β-octabromination on free-base triarylcorroles: Electrochemistry and protonation-deprotonation reactions in nonaqueous media

2017 ◽  
Vol 21 (10) ◽  
pp. 633-645 ◽  
Author(s):  
Yang Song ◽  
Yuanyuan Fang ◽  
Zhongping Ou ◽  
Jan Capar ◽  
Chenyi Wang ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Published Data ◽  
Free Base ◽  
Acid Base ◽  
Nonaqueous Media ◽  
Strong Electron ◽  
Ring Distortion ◽  
Base Properties

Electrochemical and acid-base properties of four free-base triarylcorroles were examined in nonaqueous media. These compounds are represented here as (tdcc)H[Formula: see text], (tpfc)H[Formula: see text], (Br[Formula: see text]tdcc)H[Formula: see text] and (Br[Formula: see text]tpfc)H[Formula: see text], where tdcc and tpfc are the trianions of tris(2,6-dichlorophenyl)corrole and tris(pentafluorophenyl)corrole, respectively. Different spectroscopic and electrochemical properties were observed for the [Formula: see text]-brominated corroles as compared to the non-brominated derivatives, due in part to the corrole ring distortion and in part to the strong electron-withdrawing properties of the Br groups. The brominated free-base corroles are easier to deprotonate than the non-brominated corroles in solution, which was confirmed by electrochemistry and spectroelectrochemistry as well as protonation/deprotonation reactions of the compounds with acid or base in PhCN. The electrochemistry of the protonated and deprotonated corroles is presented and comparisons made with previously published data for other protonated and deprotonated free-base corroles under the same solution conditions.

Acid–base behavior, electrochemical properties and DFT study of redox non-innocent phenol–imidazole ligands and their Cu complexes

Polyhedron ◽  
2015 ◽  
Vol 99 ◽  
pp. 34-46 ◽  
Author(s):  
Arfa Parween ◽  
Tarun Kanti Mandal ◽  
Régis Guillot ◽  
Subhendu Naskar
Keyword(s):  
Electrochemical Properties ◽  
Dft Study ◽  
Acid Base ◽  
Cu Complexes ◽  
Imidazole Ligands

scholarly journals Species-Specific, pH-Independent, Standard Redox Potential of Selenocysteine and Selenocysteamine

Antioxidants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 465
Author(s):  
Tamás Pálla ◽  
Arash Mirzahosseini ◽  
Béla Noszál
Keyword(s):  
Redox Potential ◽  
Equilibrium Constants ◽  
Biological Significance ◽  
Redox Potentials ◽  
Acid Base ◽  
Redox Equilibrium ◽  
Standard Redox Potential ◽  
Ph Dependent ◽  
Species Specific ◽  
Redox Equilibria

Microscopic redox equilibrium constants and standard redox potential values were determined to quantify selenolate-diselenide equilibria of biological significance. The highly composite, codependent acid-base and redox equilibria of selenolates could so far be converted into pH-dependent, apparent parameters (equilibrium constants, redox potentials) only. In this work, the selenolate-diselenide redox equilibria of selenocysteamine and selenocysteine against dithiothreitol were analyzed by quantitative nuclear magnetic resonance (NMR) methods to characterize the interfering acid-base and redox equilibria. The directly obtained, pH-dependent, conditional redox equilibrium constants were then decomposed by our method into pH-independent, microscopic constants, which characterize the two-electron redox transitions of selenocysteamine and selenocysteine. The 12 different, species-specific parameter values show close correlation with the respective selenolate basicities, providing a tool to estimate otherwise inaccessible site-specific selenolate-diselenide redox potentials of related moieties in large peptides and proteins.

Study of Acid-Base and Redox Equilibria for the C60/C60H2 System in Dimethyl Sulfoxide Solvent

1994 ◽  
Vol 98 (49) ◽  
pp. 13093-13098 ◽  
Author(s):  
Murat E. Niyazymbetov ◽  
Dennis H. Evans ◽  
Susan A. Lerke ◽  
Paul A. Cahill ◽  
Craig C. Henderson
Keyword(s):  
Dimethyl Sulfoxide ◽  
Acid Base ◽  
Redox Equilibria
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