Self-assembled monolayers of benzylmercaptan and paracyanoebnzylmercaptan on gold: surface infrared spectroscopic characterization

  • Autor: Rajalingam, K. / Hallmann, L. / Strunskus, T. / Bashir, A. / Tuczek, F. / Wöll, C. (2010)

  • Quelle: PhysChemChemPhys 12 (2010), 4273-4274

  • Datum: 2010

  • Rajalingam, K. / Hallmann, L. / Strunskus, T. / Bashir, A. / Tuczek, F. / Wöll, C. (2010): „Self-assembled monolayers of benzylmercaptan and paracyanoebnzylmercaptan on gold: surface infrared spectroscopic characterization“. In: PhysChemChemPhys 12 (2010), 4273-4274

Abstract

Self-assembled monolayers (SAMs) on gold substrates were prepared from benzylmercaptan ( BM) and para-cyanobenzylmercaptan (pCBM), and the resulting surfaces were investigated using conventional infrared reflection-absorption spectroscopy (IRRAS) as well as polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS).

IRRAS data are analyzed by comparison with transmission IR spectra and theoretical (DFT) simulations. The spectroscopic results indicate the presence of well-ordered monolayers of BM and pCBM with an orientation perpendicular to the surface. IRRAS and PM-IRRAS data are compared to each other and the respective merits of both methods are discussed.