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Interaction of Bis-(sodium-sulfopropyl)-Disulfide and Polyethylene Glycol on the Copper Electrodeposited Layer by Time-of-Flight Secondary-Ion Mass Spectrometry.
- Source :
-
Molecules (Basel, Switzerland) [Molecules] 2023 Jan 03; Vol. 28 (1). Date of Electronic Publication: 2023 Jan 03. - Publication Year :
- 2023
-
Abstract
- The interactions of the functional additives SPS (bis-(sodium-sulfopropyl)-disulfide) and polyethylene glycol (PEG) in the presence of chloride ions were studied by time-of-flight secondary-ion mass spectrometry (TOF-SIMS) in combination with cyclic voltammetry measurements (CV). The PEG, thiolate, and chloride surface coverages were estimated and discussed in terms of their electrochemical suppressing/accelerating abilities. The conformational influence of both the gauche/trans thiolate molecules, as well as around C-C and C-O of PEG, on the electrochemical properties were discussed. The contribution of the hydrophobic interaction of -CH <subscript>2</subscript> -CH <subscript>2</subscript> - of PEG with chloride ions was only slightly reduced after the addition of SPS, while the contribution of Cu-PEG adducts diminished strongly. SPS and PEG demonstrated significant synergy by significant co-adsorption. It was shown that the suppressing abilities of PEG that rely on forming stable Cu-PEG adducts, identified in the form C <subscript>2</subscript> H <subscript>4</subscript> O <subscript>2</subscript> Cu <superscript>+</superscript> and C <subscript>3</subscript> H <subscript>6</subscript> OCu <superscript>+</superscript> , were significantly reduced after the addition of SPS. The major role of thiolate molecules adsorbed on a copper surface in reducing the suppressing abilities of PEG rely on the efficient capture of Cu <superscript>2+</superscript> ions, diminishing the available copper ions for the ethereal oxygen of PEG.
Details
- Language :
- English
- ISSN :
- 1420-3049
- Volume :
- 28
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Molecules (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 36615624
- Full Text :
- https://doi.org/10.3390/molecules28010433