Orientation and bonding of biphenyldimethyldithiol

Authors

A. N. Caruso, University of Nebraska-LincolnFollow
R. Rajesh, University of Nebraska - Lincoln
Gordon A. Gallup, University of Nebraska-LincolnFollow
Jody G. Redepenning, University of Nebraska-LincolnFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2-18-2004

Comments

Published in Journal of Physics: Condensed Matter 16:6 (18 February 2004), pp. 845–860. Copyright © 2004 IOP Publishing Ltd. Used by permission. Online at stacks.iop.org/JPhysCM/16/845 (DOI: 10.1088/0953-8984/16/6/014)

Abstract

The molecular orbitals of 1, 1′-biphenyl-4,4′-dimethyldithiol (HS– CH₂–C₆H₄–C₆H₄–CH₂–SH) are identified from combined photoemission and inverse photoemission studies and compared with theory for several different surfaces, molecular conformations and molecular orientations. The preferential molecular orientations of biphenyldimethyldithiol, on both Au(111) and polycrystalline Co, are identified from polarization resolved photoemission studies. Two different molecular orientations are adopted by biphenyldimethyldithiol on gold depending on adsorption conditions. Biphenyldimethyldithiol is observed to bond more strongly to cobalt than gold surfaces.