Self-Assembled Monolayers Based on Pd-Containing Organometallic Thiols:Preparation and Structural Characterization

Abstract

Multilayers and self-assembled monolayers of on-purpose-preparedorganometallic thiolates, trans-[Pd(PBu3)(2)(SCOCH3)(2)], trans-[(C6H5CC)Pd(PBu3)(2)(SCOCH3)], and trans, trans-[(CH3COS)Pd(PBu3)(2)-(CC-C6H4-C6H4-C C)(PBu3)(2)Pd(SCOCH3)] Were deposited onto goldsurfaces. High-resolution X-ray photoelectron spectroscopy andnear-edge X-ray absorption fine structure measurements allowed us toassess the anchoring of the organometallic thiols onto gold substrates;the interaction occurring at the interface; and their molecularorientation oil the surface with tilt angles of about 30 degrees-40degrees, depending on. the investigated molecule. The molecule packingdensity/coverage was also assessed.