Ion Solvation of Some Copper(II) Salts in Water + N-Methyl-2-pyrrolidinone Solvent Mixtures at 30 °C

Abstract

The preferential solvation of copper(II) iodate, benzoate, formate, salicylate, p-methylbenzoate, and p-nitrobenzoate has been studied in water + N-methyl-2-pyrrolidinone mixtures at 30 °C by Gibbs energies of transfer and solvent transport number measurements. The Gibbs transfer energies of the salts were split into their ionic values using the transfer energies of copper ion determined on the basis of the negligible liquid junction potential method. These results were also compared with those obtained on the basis of the tetraphenylarsonium tetraphenylborate method. These results have been interpreted in terms of heteroselective solvation of all the salts with the copper ion being selectively solvated by N-methyl-2-pyrrolidinone and anions by water.

Tribocorrosion Study of Copper During Chemical Mechanical Polishing in Potassium Periodate-Based Slurry

“…Therefore, the patches of passivation film will contribute to the local galvanic corrosion, thus pitting will happen. Thirdly, it is reported that the copper iodate and copper periodate have a high solubility product and this could enhance the CMP MRR [28,35,51]. Therefore, the comparatively high solubility of the surface products could also enhance the static chemical corrosion in acidic solutions.…”

Synergetic Effect of 5-Methyl-1H-Benzotriazole and Sodium Dodecyl Benzene Sulfonate on CMP Performance of Ruthenium Barrier Layer in KIO4-Based Slurry

“…29 Moreover, both Cu (IO 4 ) 2 and Cu (IO 3 ) 2 are more soluble than cpper oxides. 29,41,42 Therefore, it is probable that, with the enhancement of the concentration of KIO 4 , the further growth of copper RR is resulted from the augment of the proportion of Cu(IO 4 ) 2 and Cu(IO 3 ) 2 in the passivating film. Ruthenium and its oxides convert into soluble RuO 4 2− species by reactions 8 to 10.…”