title: Dipodal ferrocene-based adsorbate molecules for self-assembled monolayers on gold.
abstract: 1,1'-Difunctionalised ferrocene derivatives have been studied, which contain groups suitable for chemisorption on gold substrates, namely -NC, -PR(2) as well as a range of sulfur-containing units like -NCS, -SR, and thienyl. Thin films on gold have been fabricated from solution with most of these adsorbate species. Film thickness, composition and structure were investigated primarily by X-ray photoelectron and near-edge X-ray absorption fine-structure spectroscopy. The quality of self-assembled monolayers fabricated from 1,1'-diisocyanoferrocene (1) and 1,1'-diisothiocyanatoferrocene (2) turned out to be superior to that of films based on the other adsorbate species investigated. In addition to the surface coordination behaviour of 1 towards gold substrates, relevant aspects of the molecular coordination chemistry of 1 have also been addressed, including the synthesis and characterisation of [(mu-1){Cr(CO)(5)}(2)], [Ag(2)(mu-1)(2)](NO(3))(2) x H(2)O and [(mu-1)(AuCl)(2)]. The crystal structure of the gold complex is governed by aurophilic interactions and can be taken as a model for the arrangement of 1 in self-assembled monolayers on gold.
authors: Applied Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany.
authors: Tobias
authors: T
authors: Weidner
authors: Nirmalya
authors: N
authors: Ballav
authors: Michael
authors: M
authors: Zharnikov
authors: Andreas
authors: A
authors: Priebe
authors: Nicholas J
authors: NJ
authors: Long
authors: Jörg
authors: J
authors: Maurer
authors: Rainer
authors: R
authors: Winter
authors: Alexander
authors: A
authors: Rothenberger
authors: Dieter
authors: D
authors: Fenske
authors: Dag
authors: D
authors: Rother
authors: Clemens
authors: C
authors: Bruhn
authors: Heinrich
authors: H
authors: Fink
authors: Ulrich
authors: U
authors: Siemeling