Adsorption of triphenylamine, triphenylphosphine, triphenylarsine, triphenylstibine, and triphenylbismuthine on gold and copper

Abstract

The triphenyl compounds of the elements of the 15th group (N, P, As, Sb, Bi) adsorb from solution onto gold and copper. The adsorption was confirmed by reflection infrared spectroscopy at grazing incidence, ellipsometry, contact angle measurements, and in two cases, X-ray photoelectron spectroscopy. The results suggest that at least three types of surface layers can occur: monolayer formation (typical examples NPh3, PPh3, and AsPh3 on gold), reaction of XPh3 with metal atoms forming a multilayer (typical example PPh3 on copper), and oxidation to oligomeric or polymeric products (typical example BiPh3 on gold). The wetting properties are characteristic for the type of metal rather than the adsorbate, apart from BiPh3 on gold. With the exception of SbPh3 and BiPh3 on gold, XPh3 desorbs at reduced pressure. Desorption in pure ethanol takes place within several minutes for the adsorbates on copper and within hours or days on gold.following, these compounds are abbreviated as NPh3, PPh3, AsPh3, SbPh3, and BiPh3 and generically as XPh3.

Reaction mechanism of the Me3AuPMe3–H2 plasma-enhanced ALD process

“…Reports in literature indicate that phosphorous based molecules can form strong bonds with a gold surface, [19][20][21][22][23][24] in line with the in-situ RAIRS and in-vacuo XPS measurements, confirming the presence of TMP groups on the gold surface after the precursor exposure. The in-situ RAIRS data also revealed the presence of CH 3 groups on the gold surface.…”

Predictive Gold Nanocluster Formation Controlled by Metal‐Ligand Complexes

“…We show that bidentate phosphine ligands can control the nascent cluster distribution as well or better than other kinetic controls in MPC syntheses 2. Other strong complexing ligands such as amines, thiols or other polymers are also reported to control the distribution of oxidized metal precursors;41–43 therefore, we predict the reduction of these metal‐ligand complexes should also have similar product control.…”

Reaction of Long-Chain Iodoalkanes with Gold Surfaces

“…In particular, the above mentioned substances: polycrystalline gold slides sulfur-containing compounds such as alkanethiols, dialkyl were prepared by condensation from the vapor, and the disulfides, and thioethers were studied (1,2). In addition, freshly prepared slides were exposed at room temperature surface modifications with alkaneselenols (3), alkanenitriles to dilute solutions of the compounds to be adsorbed under (4), phosphines (5)(6)(7), tricosylisocyanide (7), imides (8), inert gas atmosphere. triphenylamine (6), triphenylarsine (6), triphenylstibine (6), and triphenylbismuthine (6) among others were also EXPERIMENTAL described.…”

“…In addition, freshly prepared slides were exposed at room temperature surface modifications with alkaneselenols (3), alkanenitriles to dilute solutions of the compounds to be adsorbed under (4), phosphines (5)(6)(7), tricosylisocyanide (7), imides (8), inert gas atmosphere. triphenylamine (6), triphenylarsine (6), triphenylstibine (6), and triphenylbismuthine (6) among others were also EXPERIMENTAL described. The thicknesses of the adsorbed layers are typically in the range expected for monolayers, i.e., 0.5-3 nm, Materials depending on the system.…”