Experimental and DFT study of the effect of mercaptosuccinic acid on cyanide-free immersion gold deposition

Abstract

A cyanide-free gold plating bath was prepared and the complexing capacity of mercaptosuccinic acid with Au(i) was studied through density functional theory.

New Mobilization Pathway of Antimonite: Thiolation and Oxidation by Dissimilatory Metal-Reducing Bacteria via Elemental Sulfur Respiration

“…The Gibbs free energy changes (Δ G ) for the target reactions were calculated using the Gaussian 09 program . In addition, the nucleophilic attack susceptibility of Sb and the electrophilic attack susceptibility of S among Sb V -S and Sb III -S were calculated by the condensed local softness (s A ) according to a previous study . The detailed information is shown in the Supporting Information.…”

Electroless deposition of Ni–P/Au coating on Cu substrate with improved corrosion resistance from Au(iii)–DMH based cyanide-free plating bath using hypophosphite as a reducing agent

“…In our previous work, 18 we reported the stability of Au(I)-DMH based immersion gold plating bath, that precipitated gold particles could be observed obviously aer storage for 200 days at room temperature. However, in this work, the Au(III)-DMH based cyanide-free plating bath was more stable than Au(I)-DMH immersion bath, even adding NaH 2 PO 2 as the reduction agent.…”

“…Recently, mercaptosuccinic acid and L-cysteine have been used as cyanide-free ligands for Au + . 18,19 The sulydryl group has a very strong coordination ability, and can even replace part of CN À in Au(CN) 2 À . 20 However, the smell of mercaptosuccinic acid and Lcysteine are unpleasant, especially under high-temperature reaction conditions.…”

New Mobilization Pathway of Antimonite: Thiolation and Oxidation by Dissimilatory Metal-Reducing Bacteria via Elemental Sulfur Respiration

“…Further, to compare the nucleophilic attack susceptibility of Sb and electrophilic attack susceptibility of S among Sb V -S and Sb III -S, condensed local softness is calculated using the Multiwfn program 8 according to a previous study. 9 In detail, the condensed Fukui function (f A ) was obtained using Multiwfn program. 8 Condensed local softness was calculated, 9 according to the equations:…”

“…9 In detail, the condensed Fukui function (f A ) was obtained using Multiwfn program. 8 Condensed local softness was calculated, 9 according to the equations:…”