Chromomycin A3 (Chro) is capable of forming a stable dimeric complex via chelation with Ni(II), Fe(II) and Co(II). According to the circular dichroism study, the dimer conformations are significantly different among the Fe(II)-, Co(II)-, and Ni(II)-containing dimeric Chro complexes; however, the dimer conformations were preserved at high temperatures. Furthermore, we conducted a systematic stud...

The formation and growth process of precipitates in Cu-Ni-Si alloys during aging were investigated by anomalous small angle scattering (ASAXS) and X-ray absorption fine structure (XAFS). ä-Ni2Si precipitates with wide nanometer size distribution were formed in the Cu-Ni-Si alloys after a long aging time of 10 s. However, the addition of a small amount of Fe appears to reduce the wide-size distr...

Despite their relatively simple mineralogical composition (olivine + Fe–Ni metal + FeS ± pyroxene), the origin of pallasite meteorites remains debated. It has been suggested that catastrophic mixing of olivine fragments with Fe–(Ni)–S followed by various degrees of annealing could explain pallasites bearing solely or prevalently fragmented or rounded olivines. In order to verify this hypothesis...

Two cyano-bridged single-molecule magnets of {Fe(III)(4)Ni(II)(2)} and {Fe(III)(6)Ni(II)(3)} stoichiometry are described via their magnetic properties described in the frame of geometrical core distortions and orientations of their local anisotropy axes.

A cyano-bridged ferromagnetic {Fe(III)Ni(II)} alternating chain {[Fe(pzTp)(CN)3][Ni(chxn)2]}·ClO4·H2O (1) (pzTp = tetrakis(pyrazolyl)borate, chxn = (1R,2R)-1,2-diaminocyclohexane) was synthesized via rational design. Crystal structure analysis and magnetic studies demonstrated that compound had a one-dimensional zigzagging chain-like structure and slow magnetic relaxation.

The step-wise assembly of the high nuclearity cluster, {[Ni(II)(H2O)5]6[Co(III)(tmphen)2]3[Fe(II)(CN)6]2}13+, is achieved by treating {[Co(tmphen)2]3[Fe(CN)6]2} with six equivalents of Ni(ClO4)2 in aqueous MeOH.

Introduction: Data on the Ni concentration and distribution in kamacite (α) and taenite (γ) of meteoritic metal can be used to determine the cooling rates of meteorites. Several metallographic cooling rate methods have been used to determine the cooling rates of meteorites and have been recently reviewed [1]. The reliability of these models depends on the accuracy of the phase diagram and diffu...

The partial Wills-Harrison effective pair potentials in liquid equiatomic Co-Ni alloy are considered. It is shown that the account of the non-diagonal d-d couplings between electrons leads to similar changes in characteristics of the pair-potential first minimum as for Fe-Co and Fe-Ni equiatomic alloys.

We report the effect of UV-Vis light on the membrane-bound [Ni-Fe] hydrogenase from Aquifex aeolicus under turnover conditions. Using electrochemistry, we show a potential dependent light sensitivity and propose that a light-induced structural change of the [Ni-Fe] active site is related to an enhanced reactivation of the hydrogenase under illumination at high potentials.