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The single-electron detachment (SED) cross sections for Co- and Ir- in collision with Ar in the energy region of 10-30 keV are obtained in our laboratory. As our previous paper reported, the SED cross sections have velocity and electron affinity dependency. Using the least-squares method, we analyze the available experimental data of SED cross sections for different negative ions in collision with Ar, and get empirical formulas for different sets of anionic projectiles. For most anionic projectiles, there is a clear correlation between increasing electron affinity and decreasing SED cross sections. Co and Ir, however, are an exception, and we discuss how other physical parameters can be taken into account in the search for general scaling rules for SED cross sections. As the incident velocity increases, the cross section dependence of the anion's electron affinity becomes weaker, and the relation between the SED cross sections and [v.sub.p] is supposed to be [v.sup.1.5.sub.p]/[(2/3) + [v.sup.2.5.sub.p]]. PACS Nos.: 34.10.+X, 34.54.-s, 34.90.+q. Resume: Nous obtenons en laboratoire les sections efficaces de detachement d'un seul electron (SED) dans les collisions de Coet de Ir- sur de l'argon a des energies de 10 a 30 keV. Comme nous l'avons deja rapporte, les sections efficaces SED montrent une dependance en vitesse et en affinite electronique. Utilisant la methode des moindres carres, nous analysons les donnees experimentales sur les sections efficaces SED pour differents ions negatifs avec de l'argon et obtenons une relation empirique pour differents ensembles de projectiles anioniques. Pour la plupart des projectiles anioniques, il y a une claire correlation entre l'augmentation de l'affinite electronique et la decroissance de la section efficace SED. Cependant, le cobalt et l'iridium sont une exception et nous discutons comment d'autres parametres physiques peuvent etre pris en compte dans la recherche de regles d'echelle pour les sections efficaces SED. A mesure que la vitesse augmente, la dependance de la section efficace sur l'affinite faiblit et la relation entre la section efficace SED et [v.sub.p] est supposee etre [v.sup.1.5.sub.p]/[(2/3) + [v.sup.2.5.sub.p]]. [Traduit par la Redaction], Introduction Collision detachment is the process through which negative ions lose their electrons by collision with other atoms. Studying the collision detachment of a negative ion is significant for plasma [...]

Abstract: A detailed spectral model has been developed for the computer simulation of the 2p → 1s Kα X-ray emission from highly charged Fe ions in the electron beam ion [...]

The reactivity of Fe(super +) toward OCS on both quartet and sextet potential energy surfaces was investigated in this study at the B3LYP/6-311+G(d) level of theory. The studies results indicate that both the C-O and C-S bond activations proceed according to an insertion elimination mechanism would be general for the reaction of first-row transition with small sulfide molecules.

The recent discovery of novel ferroelectricity arising from the polar ordering of [Fe.sup.3+] and [Fe.sup.2+] in a mixed valence triangular lattice oxide Lu[Fe.sub.2][O.sub.4] is discussed. Findings reveal the development of the polar superlattice of [Fe.sup.3+] and [Fe.sup.2+] below 350 K.

A tunable synthesis of iron nanoparticles (NPs) based on the decomposition of [{Fe[[N[(Si[Me.sub.3]).sub.2]].sub.2]}.sub.2] in the presence of organic superstructure composed of palmitic acid and hexadecylamine is described. The studies have involved an anisotropic growth process inside organic superstructures, leading to monocrystalline cubic NPs and isotropic growth outside these superstructures, yielding polycrystalline spherical NPs.

The fate of the iron complex nitrilotriacetic acid-Fe(III) (FeNTA) is examined during the photo- and biodegradation processes. The results have proposed mechanistic schemes for FeNTA degradation by solar light and by Rhodococcus rhodochrous.

The aqueous two-phase systems formed by adding poly(ethylene oxide) to an aqueous salt solution are used to study the partitioning behavior of pentacyanonitrosilmetallate complexes. The results showed that the presence of anions in the polymer-rich phase is caused by an EO-[[M[(CN).sub.5]NO].sup.x-] (M = Fe, Mn, or Cr) enthalpic interaction.

The iron 2p and carbon 1s near-edge X-ray absorption fine structure (NEXAFS) spectra of substituted ferrocene compounds are interpreted with the help of extended Huckel molecular orbital (EHMO) theory and density functional theory (DFT). The substituent effects are related to the electron donating/withdrawing properties of the cyclopentadienyl ligands and their substituents as well as the presence of [pi]* conjugation between the cyclopentadienyl ligand and unsaturated substituents.