Molecular Suction Pads: Self-Assembled Monolayers of Subphthalocyaninatoboron Complexes on Gold

TitleMolecular Suction Pads: Self-Assembled Monolayers of Subphthalocyaninatoboron Complexes on Gold
Publication TypeJournal Article
Year of Publication2013
AuthorsGlebe U, Baio JE, rnadóttir LÁ, Siemeling U, Weidner T
JournalChemPhysChem
Volume14
Pagination1155-1160
Date Published2013
ISBN Number1439-7641
Keywordsmonolayers, nexafs spectroscopy, Self-assembly, subphthalocyaninatoboron complexes, X-ray photoelectron spectroscopy
Abstract

Subphthalocyaninatoboron complexes with six long-chain alkylthio substituents in their periphery are applicable for the formation of self-assembled monolayers (SAMs) on gold. Such films are prepared from solution with the axially chlorido-substituted derivatives and characterised by near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The results are in accord with the formation of SAMs assembled by the chemisorption of both covalently bound thiolate-type as well as coordinatively bound thioether units. The adsorbate molecules adopt an essentially flat adsorption geometry on the substrate, resembling a suction pad on a surface.

DOI10.1002/cphc.201300074