Gold-Induced Desulfurization in a Bis(ferrocenyl) Alkane Dithiol

Research output: Contribution to journalArticle

Authors

  • Evangelina Pensa
  • Rafał Karpowicz
  • Artur Jabłoński
  • Damian Trzybiński
  • Krzysztof Woźniak
  • Davor Šakić
  • Valerije Vrček
  • Nicholas J. Long
  • Konrad Kowalski

Colleges, School and Institutes

Abstract

Thiol-modified ferrocenes on gold have been archetypical model systems for many fundamental charge transfer and other studies, since both thiol-gold and ferrocene redox chemistry are considered to be well-understood. Thus unexpectedly, we found that for a representative of a new class of flexibly linked bis-ferrocenyl compounds, namely, 1-10-bis(1-ferrocenyl)decane dithiol, surface immobilization on gold failed. Instead, in the presence of gold, molecular decomposition took place, resulting in sulfur-based adlayers and well-defined molecular elimination products, for which we provide spectroscopic evidence. Careful control experiments and comparison with related ferrocene compounds provide insight into the mechanism of the observed elimination reactions, as a combined effect of the molecular structure and the nature of the gold/sulfur bond. These findings, thus, have a broader impact on the design of molecular adlayers, for example, in the context of surface functionalization in sensing or the synthesis of gold nanoparticles.

Details

Original languageEnglish
Pages (from-to)2227-2232
Number of pages6
JournalOrganometallics
Volume38
Issue number9
Early online date17 Apr 2019
Publication statusPublished - 13 May 2019