Tetsuya Maruo

Structural determination of solvated copper species in formamide solution by EXAFS

The EXAFS studies on CuBr2 –LiBr solutions in formamide showed that the existing species remained to be [Cu(formamide)4 ]2+ with the Cu–O distance of 1.97 A even when the bromide concentration was increased. From the analysis of two other peaks in the EXAFS Fourier transform, the structure of the solvated species has been proposed.

EXAFS studies on the methanol and ethanol solutions of cobalt(II) bromides

The results of an EXAFS investigation of methanol and ethanol solutions of CoBr2 are reported. The curve fitting analysis gives the coordination numbers and the Co−Br and Co-solvent distances. The results for both 0.2M and 3.8M CoBr2 in ethanol show the existence of [CoBr2(C2H5OH)2] as the dominant species, although a considerable amount of octahedral species also exists in the solutions. In 0.2 and 3.3M CoBr2 methanol solutions, the dominant species are [Co(CH3OH)6]2+ and [CoBr(CH3OH)5]+, respectively.

An exafs study of aqueous cyanocuprate(I) solutions with a position-sensitive photodiode array

Abstract Aqueous cyanocuprate solutions have been studied with a laboratory EXAFS apparatus. EXAFS spectra obtained for [Cu(CN)3]2− and [Cu(CN)4]3− solutions are analyzed by the curve-fitting method. A comparison with solid cyano complexes gives the structural parameters of aqueous cyanocuprates.

EXAFS study of solute–solute and solute–solvent interactions in acetonitrile solutions of CuBr2+nLiBr (n=0, 1, and 2)

The EXAFS studies of acetonitrile solutions of CuBr2, CuBr2+LiBr, and CuBr2+2LiBr have been carried out. The EXAFS spectra of Cu and Br edges were measured and transformed to radial distribution functions around Cu and Br ions, respectively. The curve‐fitting analysis shows that the main species are [CuBr2(NCCH3)2], [CuBr3(NCCH3)]−, and [CuBr4]2− in the solutions containing Br− and Cu2+ in the Br−/Cu2+ ratio of 2, 3, and 4, respectively.