Standard redox potentials, E8s and redox processes of U, Np and Pu ions in acidic aqueous solutions are reviewed and evaluated critically. The E8s of reversible redox processes, MO2 /MO2 ‡ and M/M (M: U, Np or Pu) adopted are those proposed mainly by Riglet et al. on the basis of the precise correction of formal potentials, E8 s, according to the improved theoretical approach to estimate the ac...

Abstract. Sensitive and selective detection of biologically and environmentally important anions has been a vast growing field in supramolecular chemistry [1,2]. Much research has been devoted to designing sensors that can selectively recognize anions. Recently, we have reported an anionic and solvatochromatic sensor [5]. (Scheme 1) In this investigation, the effect of various anions on the red...

Organic chemistry plays an important role in the development of high-performance rechargeable batteries exceeding Li-ion batteries using LiCoO2 as a cathode-active material. The authors implemented the high-capacity rechargeable batteries using trioxotriangulene (TOT) stable neutral radicals with four-stage redox ability as cathode-active materials. These batteries showed the capacity of 311 A ...

Azotobacter vinelandii flavodoxin II serves as a physiological reductant of nitrogenase, the enzyme system mediating biological nitrogen fixation. Wildtype A. vinelandii flavodoxin II was electrochemically and crystallographically characterized to better understand the molecular basis for this functional role. The redox properties were monitored on surfactant-modified basal plane graphite elect...

Intramolecular electron transfer within proteins is an essential process in bioenergetics. Redox cofactors are embedded in proteins, and this matrix strongly influences their redox potential. Several cofactors are usually found in these complexes, and they are structurally organized in a chain with distances between the electron donor and acceptor short enough to allow rapid electron tunneling....

Thioredoxins are small soluble proteins that contain a redox-active disulfide (CXXC). These disulfides are tuned to oxidizing or reducing potentials depending on the function of the thioredoxin within the cell. The mechanism by which the potential is tuned has been controversial, with two main hypotheses: first, that redox potential (Em) is specifically governed by a molecular 'rheostat'-the XX...

Redox titrations followed by visible spectroscopy were performed at various pH values with the nine-haem cytochrome c from Desulfovibrio desulfuricans ATCC 27774 (Dd27774). Macroscopic midpoint reduction potentials of the haems and pKa ox and pKa red values of acid /base centres that interact with the redox centres were estimated by using a thermodynamic model, in which the haems are grouped in...

Theoretical studies on the DNA-photocleavage efficiencies of Ru(II) polypyridyl complexes 1-4 have been carried out using density functional theory (DFT). First, an evaluation of the computational accuracy of the redox potentials for [Ru(bpy)(3)](2+) in the ground state and the excited state was tested by different computational methods. Secondly, the redox potentials of complexes 1-4 in the ex...

Density functional theory method at the level of B3LYP/6-31G(d,p) in combination with the polarizeable continuum model have been used to compute one-electron oxidation potentials for eighteen N-hydroxy compounds in aqueous solution. Analysis of correlation between the experimental oxidation potentials and the theoretically calculated values revealed that notable relations existed between the ex...